�ݺ�ߣshows by User: jrossibarra

�ݺ�ߣshows by User: jrossibarra / http://www.slideshare.net/images/logo.gif �ݺ�ߣshows by User: jrossibarra / Sat, 24 Mar 2018 08:04:02 GMT �ݺ�ߣShare feed for �ݺ�ߣshows by User: jrossibarra A bad genetic history of maize /slideshow/a-bad-genetic-history-of-maize/91777328 mgctopresent-180324080402
Deleterious alleles have played an important role in the evolution of maize and teosinte. Although they vary in their strength and effect across populations or environments, such mutations have played a role in local adaptation in teosinte, the accumulation of load during domestication and dispersal of maize, local adaptation of maize landraces, and ultimately in hybrid vigor for agronomic traits in breeding programs.]]>
Deleterious alleles have played an important role in the evolution of maize and teosinte. Although they vary in their strength and effect across populations or environments, such mutations have played a role in local adaptation in teosinte, the accumulation of load during domestication and dispersal of maize, local adaptation of maize landraces, and ultimately in hybrid vigor for agronomic traits in breeding programs.]]> Sat, 24 Mar 2018 08:04:02 GMT /slideshow/a-bad-genetic-history-of-maize/91777328 jrossibarra@slideshare.net(jrossibarra) A bad genetic history of maize jrossibarra Deleterious alleles have played an important role in the evolution of maize and teosinte. Although they vary in their strength and effect across populations or environments, such mutations have played a role in local adaptation in teosinte, the accumulation of load during domestication and dispersal of maize, local adaptation of maize landraces, and ultimately in hybrid vigor for agronomic traits in breeding programs. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/mgctopresent-180324080402-thumbnail.jpg?width=120&height=120&fit=bounds" /> Deleterious alleles have played an important role in the evolution of maize and teosinte. Although they vary in their strength and effect across populations or environments, such mutations have played a role in local adaptation in teosinte, the accumulation of load during domestication and dispersal of maize, local adaptation of maize landraces, and ultimately in hybrid vigor for agronomic traits in breeding programs.

A bad genetic history of maize from jrossibarra

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0 Adaptation in plant genomes: bigger is different /slideshow/adaptation-in-plant-genomes-bigger-is-different/86659688 pag18ajb-180124220348
Here we have proposed the functional space hypothesis, positing that mutational target size scales with genome size, impacting the number, source, and genomic location of beneficial mutations that contribute to adaptation. Though motivated by preliminary evidence, mostly from Arabidopsis and maize, more data are needed before any rigorous assessment of the hypothesis can be made. If correct, the functional space hypothesis suggests that we should expect plants with large genomes to exhibit more functional mutations outside of genes, more regulatory variation, and likely less signal of strong selective sweeps reducing diversity. These differences have implications for how we study the evolution and development of plant genomes, from where we should look for signals of adaptation to what patterns we expect adaptation to leave in genetic diversity or gene expression data. While flowering plant genomes vary across more than three orders of magnitude in size, most studies of both functional and evolutionary genomics have focused on species at the extreme small edge of this scale. Our hypothesis predicts that methods and results from these small genomes may not replicate well as we begin to explore large plant genomes. Finally, while we have focused here on evidence from plant genomes, we see no a priori reason why similar arguments might not hold in other taxa as well. ]]>
Here we have proposed the functional space hypothesis, positing that mutational target size scales with genome size, impacting the number, source, and genomic location of beneficial mutations that contribute to adaptation. Though motivated by preliminary evidence, mostly from Arabidopsis and maize, more data are needed before any rigorous assessment of the hypothesis can be made. If correct, the functional space hypothesis suggests that we should expect plants with large genomes to exhibit more functional mutations outside of genes, more regulatory variation, and likely less signal of strong selective sweeps reducing diversity. These differences have implications for how we study the evolution and development of plant genomes, from where we should look for signals of adaptation to what patterns we expect adaptation to leave in genetic diversity or gene expression data. While flowering plant genomes vary across more than three orders of magnitude in size, most studies of both functional and evolutionary genomics have focused on species at the extreme small edge of this scale. Our hypothesis predicts that methods and results from these small genomes may not replicate well as we begin to explore large plant genomes. Finally, while we have focused here on evidence from plant genomes, we see no a priori reason why similar arguments might not hold in other taxa as well. ]]> Wed, 24 Jan 2018 22:03:48 GMT /slideshow/adaptation-in-plant-genomes-bigger-is-different/86659688 jrossibarra@slideshare.net(jrossibarra) Adaptation in plant genomes: bigger is different jrossibarra Here we have proposed the functional space hypothesis, positing that mutational target size scales with genome size, impacting the number, source, and genomic location of beneficial mutations that contribute to adaptation. Though motivated by preliminary evidence, mostly from Arabidopsis and maize, more data are needed before any rigorous assessment of the hypothesis can be made. If correct, the functional space hypothesis suggests that we should expect plants with large genomes to exhibit more functional mutations outside of genes, more regulatory variation, and likely less signal of strong selective sweeps reducing diversity. These differences have implications for how we study the evolution and development of plant genomes, from where we should look for signals of adaptation to what patterns we expect adaptation to leave in genetic diversity or gene expression data. While flowering plant genomes vary across more than three orders of magnitude in size, most studies of both functional and evolutionary genomics have focused on species at the extreme small edge of this scale. Our hypothesis predicts that methods and results from these small genomes may not replicate well as we begin to explore large plant genomes. Finally, while we have focused here on evidence from plant genomes, we see no a priori reason why similar arguments might not hold in other taxa as well. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/pag18ajb-180124220348-thumbnail.jpg?width=120&height=120&fit=bounds" /> Here we have proposed the functional space hypothesis, positing that mutational target size scales with genome size, impacting the number, source, and genomic location of beneficial mutations that contribute to adaptation. Though motivated by preliminary evidence, mostly from Arabidopsis and maize, more data are needed before any rigorous assessment of the hypothesis can be made. If correct, the functional space hypothesis suggests that we should expect plants with large genomes to exhibit more functional mutations outside of genes, more regulatory variation, and likely less signal of strong selective sweeps reducing diversity. These differences have implications for how we study the evolution and development of plant genomes, from where we should look for signals of adaptation to what patterns we expect adaptation to leave in genetic diversity or gene expression data. While flowering plant genomes vary across more than three orders of magnitude in size, most studies of both functional and evolutionary genomics have focused on species at the extreme small edge of this scale. Our hypothesis predicts that methods and results from these small genomes may not replicate well as we begin to explore large plant genomes. Finally, while we have focused here on evidence from plant genomes, we see no a priori reason why similar arguments might not hold in other taxa as well.

Adaptation in plant genomes: bigger is different from jrossibarra

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0 Parallel Altitudinal Clines Reveal Adaptive Evolution Of Genome Size In Zea mays /slideshow/parallel-altitudinal-clines-reveal-adaptive-evolution-of-genome-size-in-zea-mays/86659577 pag18pgen-180124220144
While the vast majority of genome size variation in plants is due to differences in repetitive sequence, we know little about how selection acts on repeat content in natural populations. Here we investigate parallel changes in intraspecific genome size and repeat content of domesticated maize (Zea mays) landraces and their wild relative teosinte across altitudinal gradients in Mesoamerica and South America. We combine genotyping, low coverage whole-genome sequence data, and flow cytometry to test for evidence of selection on genome size and individual repeat abundance. We find that population structure alone cannot explain the observed variation, implying that clinal patterns of genome size are maintained by natural selection. Our modeling additionally provides evidence of selection on individual heterochromatic knob repeats, likely due to their large individual contribution to genome size. To better understand the phenotypes driving selection on genome size, we conducted a growth chamber experiment using a population of highland teosinte exhibiting extensive variation in genome size. We find weak support for a positive correlation between genome size and cell size, but stronger support for a negative correlation between genome size and the rate of cell production. Reanalyzing published data of cell counts in maize shoot apical meristems, we then identify a negative correlation between cell production rate and flowering time. Together, our data suggest a model in which variation in genome size is driven by natural selection on flowering time across altitudinal clines, connecting intraspecific variation in repetitive sequence to important differences in adaptive phenotypes. ]]>
While the vast majority of genome size variation in plants is due to differences in repetitive sequence, we know little about how selection acts on repeat content in natural populations. Here we investigate parallel changes in intraspecific genome size and repeat content of domesticated maize (Zea mays) landraces and their wild relative teosinte across altitudinal gradients in Mesoamerica and South America. We combine genotyping, low coverage whole-genome sequence data, and flow cytometry to test for evidence of selection on genome size and individual repeat abundance. We find that population structure alone cannot explain the observed variation, implying that clinal patterns of genome size are maintained by natural selection. Our modeling additionally provides evidence of selection on individual heterochromatic knob repeats, likely due to their large individual contribution to genome size. To better understand the phenotypes driving selection on genome size, we conducted a growth chamber experiment using a population of highland teosinte exhibiting extensive variation in genome size. We find weak support for a positive correlation between genome size and cell size, but stronger support for a negative correlation between genome size and the rate of cell production. Reanalyzing published data of cell counts in maize shoot apical meristems, we then identify a negative correlation between cell production rate and flowering time. Together, our data suggest a model in which variation in genome size is driven by natural selection on flowering time across altitudinal clines, connecting intraspecific variation in repetitive sequence to important differences in adaptive phenotypes. ]]> Wed, 24 Jan 2018 22:01:44 GMT /slideshow/parallel-altitudinal-clines-reveal-adaptive-evolution-of-genome-size-in-zea-mays/86659577 jrossibarra@slideshare.net(jrossibarra) Parallel Altitudinal Clines Reveal Adaptive Evolution Of Genome Size In Zea mays jrossibarra While the vast majority of genome size variation in plants is due to differences in repetitive sequence, we know little about how selection acts on repeat content in natural populations. Here we investigate parallel changes in intraspecific genome size and repeat content of domesticated maize (Zea mays) landraces and their wild relative teosinte across altitudinal gradients in Mesoamerica and South America. We combine genotyping, low coverage whole-genome sequence data, and flow cytometry to test for evidence of selection on genome size and individual repeat abundance. We find that population structure alone cannot explain the observed variation, implying that clinal patterns of genome size are maintained by natural selection. Our modeling additionally provides evidence of selection on individual heterochromatic knob repeats, likely due to their large individual contribution to genome size. To better understand the phenotypes driving selection on genome size, we conducted a growth chamber experiment using a population of highland teosinte exhibiting extensive variation in genome size. We find weak support for a positive correlation between genome size and cell size, but stronger support for a negative correlation between genome size and the rate of cell production. Reanalyzing published data of cell counts in maize shoot apical meristems, we then identify a negative correlation between cell production rate and flowering time. Together, our data suggest a model in which variation in genome size is driven by natural selection on flowering time across altitudinal clines, connecting intraspecific variation in repetitive sequence to important differences in adaptive phenotypes. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/pag18pgen-180124220144-thumbnail.jpg?width=120&height=120&fit=bounds" /> While the vast majority of genome size variation in plants is due to differences in repetitive sequence, we know little about how selection acts on repeat content in natural populations. Here we investigate parallel changes in intraspecific genome size and repeat content of domesticated maize (Zea mays) landraces and their wild relative teosinte across altitudinal gradients in Mesoamerica and South America. We combine genotyping, low coverage whole-genome sequence data, and flow cytometry to test for evidence of selection on genome size and individual repeat abundance. We find that population structure alone cannot explain the observed variation, implying that clinal patterns of genome size are maintained by natural selection. Our modeling additionally provides evidence of selection on individual heterochromatic knob repeats, likely due to their large individual contribution to genome size. To better understand the phenotypes driving selection on genome size, we conducted a growth chamber experiment using a population of highland teosinte exhibiting extensive variation in genome size. We find weak support for a positive correlation between genome size and cell size, but stronger support for a negative correlation between genome size and the rate of cell production. Reanalyzing published data of cell counts in maize shoot apical meristems, we then identify a negative correlation between cell production rate and flowering time. Together, our data suggest a model in which variation in genome size is driven by natural selection on flowering time across altitudinal clines, connecting intraspecific variation in repetitive sequence to important differences in adaptive phenotypes.

Parallel Altitudinal Clines Reveal Adaptive Evolution Of Genome Size In Zea mays from jrossibarra

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0 Genome size and adaptation in plants /slideshow/genome-size-and-adaptation-in-plants/80817541 cuboulder17-171015005907
Intraspecific adaptive variation in genome size in maize. The effects of genome size on adaptation across species.]]>
Intraspecific adaptive variation in genome size in maize. The effects of genome size on adaptation across species.]]> Sun, 15 Oct 2017 00:59:07 GMT /slideshow/genome-size-and-adaptation-in-plants/80817541 jrossibarra@slideshare.net(jrossibarra) Genome size and adaptation in plants jrossibarra Intraspecific adaptive variation in genome size in maize. The effects of genome size on adaptation across species. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/cuboulder17-171015005907-thumbnail.jpg?width=120&height=120&fit=bounds" /> Intraspecific adaptive variation in genome size in maize. The effects of genome size on adaptation across species.

Genome size and adaptation in plants from jrossibarra

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0 Adaptive evolution of genome size across altitudinal clines in maize /slideshow/adaptive-evolution-of-genome-size-across-altitudinal-clines-in-maize/77542815 smbe17ross-ibarra-170705161113
Genome size in plants can vary by orders of magnitude, but this variation has long been considered to be of little to no functional consequence. Studying three independent adaptations to high elevation in Zea mays, we find that genome size experiences parallel pressure from natural selection, causing a linear reduction in genome size with increasing altitude. Though reductions in repetitive content are responsible for the genome size change, we find that repeats are not targeted uniformly, but that the same repetitive sequences are removed as Z. mays taxa move to higher altitude. To identify the phenotype influenced by genome size, we study how 20% variation in genome size in a single teosinte population impacts leaf growth. We find that genome size variation correlates negatively with cell production rate but not cell size, suggesting that individuals with larger genomes require longer to complete a mitotic cycle. We reanalyze data from maize inbreds to show that slower cell production can lead to a delay in flowering time, suggesting that genome size can be used as a developmental clock to help adapt maize to different altitudes.]]>
Genome size in plants can vary by orders of magnitude, but this variation has long been considered to be of little to no functional consequence. Studying three independent adaptations to high elevation in Zea mays, we find that genome size experiences parallel pressure from natural selection, causing a linear reduction in genome size with increasing altitude. Though reductions in repetitive content are responsible for the genome size change, we find that repeats are not targeted uniformly, but that the same repetitive sequences are removed as Z. mays taxa move to higher altitude. To identify the phenotype influenced by genome size, we study how 20% variation in genome size in a single teosinte population impacts leaf growth. We find that genome size variation correlates negatively with cell production rate but not cell size, suggesting that individuals with larger genomes require longer to complete a mitotic cycle. We reanalyze data from maize inbreds to show that slower cell production can lead to a delay in flowering time, suggesting that genome size can be used as a developmental clock to help adapt maize to different altitudes.]]> Wed, 05 Jul 2017 16:11:13 GMT /slideshow/adaptive-evolution-of-genome-size-across-altitudinal-clines-in-maize/77542815 jrossibarra@slideshare.net(jrossibarra) Adaptive evolution of genome size across altitudinal clines in maize jrossibarra Genome size in plants can vary by orders of magnitude, but this variation has long been considered to be of little to no functional consequence. Studying three independent adaptations to high elevation in Zea mays, we find that genome size experiences parallel pressure from natural selection, causing a linear reduction in genome size with increasing altitude. Though reductions in repetitive content are responsible for the genome size change, we find that repeats are not targeted uniformly, but that the same repetitive sequences are removed as Z. mays taxa move to higher altitude. To identify the phenotype influenced by genome size, we study how 20% variation in genome size in a single teosinte population impacts leaf growth. We find that genome size variation correlates negatively with cell production rate but not cell size, suggesting that individuals with larger genomes require longer to complete a mitotic cycle. We reanalyze data from maize inbreds to show that slower cell production can lead to a delay in flowering time, suggesting that genome size can be used as a developmental clock to help adapt maize to different altitudes. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/smbe17ross-ibarra-170705161113-thumbnail.jpg?width=120&height=120&fit=bounds" /> Genome size in plants can vary by orders of magnitude, but this variation has long been considered to be of little to no functional consequence. Studying three independent adaptations to high elevation in Zea mays, we find that genome size experiences parallel pressure from natural selection, causing a linear reduction in genome size with increasing altitude. Though reductions in repetitive content are responsible for the genome size change, we find that repeats are not targeted uniformly, but that the same repetitive sequences are removed as Z. mays taxa move to higher altitude. To identify the phenotype influenced by genome size, we study how 20% variation in genome size in a single teosinte population impacts leaf growth. We find that genome size variation correlates negatively with cell production rate but not cell size, suggesting that individuals with larger genomes require longer to complete a mitotic cycle. We reanalyze data from maize inbreds to show that slower cell production can lead to a delay in flowering time, suggesting that genome size can be used as a developmental clock to help adapt maize to different altitudes.

Adaptive evolution of genome size across altitudinal clines in maize from jrossibarra

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0 Gene flow and cross-incompatibility in maize and teosinte /slideshow/gene-flow-and-crossincompatibility-in-maize-and-teosinte/76578381 cpbworkshop-170602013546
Maize and teosinte introgression, gametophytic factors, cross-incompatibility, adaptation.]]>
Maize and teosinte introgression, gametophytic factors, cross-incompatibility, adaptation.]]> Fri, 02 Jun 2017 01:35:45 GMT /slideshow/gene-flow-and-crossincompatibility-in-maize-and-teosinte/76578381 jrossibarra@slideshare.net(jrossibarra) Gene flow and cross-incompatibility in maize and teosinte jrossibarra Maize and teosinte introgression, gametophytic factors, cross-incompatibility, adaptation. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/cpbworkshop-170602013546-thumbnail.jpg?width=120&height=120&fit=bounds" /> Maize and teosinte introgression, gametophytic factors, cross-incompatibility, adaptation.

Gene flow and cross-incompatibility in maize and teosinte from jrossibarra

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0 Evolutionary genetics of hybrid maize /slideshow/evolutionary-genetics-of-hybrid-maize/72472998 hm2017-170222191315
research and unasked for opinions on the evolution of hybrid maize]]>
research and unasked for opinions on the evolution of hybrid maize]]> Wed, 22 Feb 2017 19:13:15 GMT /slideshow/evolutionary-genetics-of-hybrid-maize/72472998 jrossibarra@slideshare.net(jrossibarra) Evolutionary genetics of hybrid maize jrossibarra research and unasked for opinions on the evolution of hybrid maize <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/hm2017-170222191315-thumbnail.jpg?width=120&height=120&fit=bounds" /> research and unasked for opinions on the evolution of hybrid maize

Evolutionary genetics of hybrid maize from jrossibarra

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0 Evolutionary Genetics of Complex Genome /slideshow/evolutionary-genetics-of-complex-genome/60939955 ua2016-160415032600
Seminar in School of Plant Sciences, U. Arizona]]>
Seminar in School of Plant Sciences, U. Arizona]]> Fri, 15 Apr 2016 03:26:00 GMT /slideshow/evolutionary-genetics-of-complex-genome/60939955 jrossibarra@slideshare.net(jrossibarra) Evolutionary Genetics of Complex Genome jrossibarra Seminar in School of Plant Sciences, U. Arizona <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/ua2016-160415032600-thumbnail.jpg?width=120&height=120&fit=bounds" /> Seminar in School of Plant Sciences, U. Arizona

Evolutionary Genetics of Complex Genome from jrossibarra

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0 JGI: Genome size impacts on plant adaptation /slideshow/jgi-genome-size-impacts-on-plant-adaptation/59957711 jgi2016alt-160323224228
Genome size may impact how plant genomes adapt, offering larger mutational targets leading to more adaptation from standing variation and more adaptation in noncoding regions.]]>
Genome size may impact how plant genomes adapt, offering larger mutational targets leading to more adaptation from standing variation and more adaptation in noncoding regions.]]> Wed, 23 Mar 2016 22:42:28 GMT /slideshow/jgi-genome-size-impacts-on-plant-adaptation/59957711 jrossibarra@slideshare.net(jrossibarra) JGI: Genome size impacts on plant adaptation jrossibarra Genome size may impact how plant genomes adapt, offering larger mutational targets leading to more adaptation from standing variation and more adaptation in noncoding regions. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/jgi2016alt-160323224228-thumbnail.jpg?width=120&height=120&fit=bounds" /> Genome size may impact how plant genomes adapt, offering larger mutational targets leading to more adaptation from standing variation and more adaptation in noncoding regions.

JGI: Genome size impacts on plant adaptation from jrossibarra

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0 Demography and deleterious alleles in maize /slideshow/demography-and-deleterious-alleles-in-maize/59399595 usc2016-160311003441
Seminar to USC Computational Biology Feb. 2016]]>
Seminar to USC Computational Biology Feb. 2016]]> Fri, 11 Mar 2016 00:34:41 GMT /slideshow/demography-and-deleterious-alleles-in-maize/59399595 jrossibarra@slideshare.net(jrossibarra) Demography and deleterious alleles in maize jrossibarra Seminar to USC Computational Biology Feb. 2016 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/usc2016-160311003441-thumbnail.jpg?width=120&height=120&fit=bounds" /> Seminar to USC Computational Biology Feb. 2016

Demography and deleterious alleles in maize from jrossibarra

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0 Langebio 2015 /slideshow/langebio-2015/55439370 langebio2015-151123230044-lva1-app6891
Selection and demography talk at Langebio Nov. 2015]]>
Selection and demography talk at Langebio Nov. 2015]]> Mon, 23 Nov 2015 23:00:44 GMT /slideshow/langebio-2015/55439370 jrossibarra@slideshare.net(jrossibarra) Langebio 2015 jrossibarra Selection and demography talk at Langebio Nov. 2015 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/langebio2015-151123230044-lva1-app6891-thumbnail.jpg?width=120&height=120&fit=bounds" /> Selection and demography talk at Langebio Nov. 2015

Langebio 2015 from jrossibarra

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0 Corn: Diversity and Origins /slideshow/2015-sf-exploratorium-lecture-corn-diversity-and-origins/54910275 exploratorium2015-151109142519-lva1-app6891
Public lecture at the San Francisco Exploratorium on corn. Part of their Science of Food series http://www.exploratorium.edu/press-office/press-releases/science-food-series-launches-exploratorium]]>
Public lecture at the San Francisco Exploratorium on corn. Part of their Science of Food series http://www.exploratorium.edu/press-office/press-releases/science-food-series-launches-exploratorium]]> Mon, 09 Nov 2015 14:25:19 GMT /slideshow/2015-sf-exploratorium-lecture-corn-diversity-and-origins/54910275 jrossibarra@slideshare.net(jrossibarra) 2015 SF Exploratorium Lecture: "Corn: Diversity and Origins" jrossibarra Public lecture at the San Francisco Exploratorium on corn. Part of their Science of Food series http://www.exploratorium.edu/press-office/press-releases/science-food-series-launches-exploratorium <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/exploratorium2015-151109142519-lva1-app6891-thumbnail.jpg?width=120&height=120&fit=bounds" /> Public lecture at the San Francisco Exploratorium on corn. Part of their Science of Food series http://www.exploratorium.edu/press-office/press-releases/science-food-series-launches-exploratorium

2015 SF Exploratorium Lecture: "Corn: Diversity and Origins" from jrossibarra

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0 Toronto 2015 /slideshow/toronto-2015-54050851/54050851 toronto2015-151017060607-lva1-app6891
Seminar on linked selection and demography in maize, U of Toronto, October 2015]]>
Seminar on linked selection and demography in maize, U of Toronto, October 2015]]> Sat, 17 Oct 2015 06:06:07 GMT /slideshow/toronto-2015-54050851/54050851 jrossibarra@slideshare.net(jrossibarra) Toronto 2015 jrossibarra Seminar on linked selection and demography in maize, U of Toronto, October 2015 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/toronto2015-151017060607-lva1-app6891-thumbnail.jpg?width=120&height=120&fit=bounds" /> Seminar on linked selection and demography in maize, U of Toronto, October 2015

Toronto 2015 from jrossibarra

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0 Danforth 2015 /slideshow/danforth-2015/54050788 danforth2015-151017060154-lva1-app6892
Seminar at Danforth center, Sept. 2015]]>
Seminar at Danforth center, Sept. 2015]]> Sat, 17 Oct 2015 06:01:54 GMT /slideshow/danforth-2015/54050788 jrossibarra@slideshare.net(jrossibarra) Danforth 2015 jrossibarra Seminar at Danforth center, Sept. 2015 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/danforth2015-151017060154-lva1-app6892-thumbnail.jpg?width=120&height=120&fit=bounds" /> Seminar at Danforth center, Sept. 2015

Danforth 2015 from jrossibarra

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0 Presentation at SMBEBA /slideshow/presentation-at-smbeba/49104741 smbeba-150608032254-lva1-app6891
Presentation on selection and linked diversity at SMBEBA in May 2015]]>
Presentation on selection and linked diversity at SMBEBA in May 2015]]> Mon, 08 Jun 2015 03:22:54 GMT /slideshow/presentation-at-smbeba/49104741 jrossibarra@slideshare.net(jrossibarra) Presentation at SMBEBA jrossibarra Presentation on selection and linked diversity at SMBEBA in May 2015 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/smbeba-150608032254-lva1-app6891-thumbnail.jpg?width=120&height=120&fit=bounds" /> Presentation on selection and linked diversity at SMBEBA in May 2015

Presentation at SMBEBA from jrossibarra

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0 Complex adaptation in Zea /slideshow/complex-adaptation-in-zea-39662070/39662070 isu7-140929115552-phpapp01
Some thoughts on the complexities of adaptation in a big plant genome.]]>
Some thoughts on the complexities of adaptation in a big plant genome.]]> Mon, 29 Sep 2014 11:55:52 GMT /slideshow/complex-adaptation-in-zea-39662070/39662070 jrossibarra@slideshare.net(jrossibarra) Complex adaptation in Zea jrossibarra Some thoughts on the complexities of adaptation in a big plant genome. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/isu7-140929115552-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds" /> Some thoughts on the complexities of adaptation in a big plant genome.

Complex adaptation in Zea from jrossibarra

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0 Introgression and the origin of maize in Mexico and the Southwest US /slideshow/introgression-and-the-origin-of-maize-in-mexico-and-the-southwest-us/39636096 langebio-140929003930-phpapp02
Introgression and the origin of maize in Mexico and the Southwest US]]>
Introgression and the origin of maize in Mexico and the Southwest US]]> Mon, 29 Sep 2014 00:39:29 GMT /slideshow/introgression-and-the-origin-of-maize-in-mexico-and-the-southwest-us/39636096 jrossibarra@slideshare.net(jrossibarra) Introgression and the origin of maize in Mexico and the Southwest US jrossibarra Introgression and the origin of maize in Mexico and the Southwest US <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/langebio-140929003930-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds" /> Introgression and the origin of maize in Mexico and the Southwest US

Introgression and the origin of maize in Mexico and the Southwest US from jrossibarra

]]> 1421 3 https://cdn.slidesharecdn.com/ss_thumbnails/langebio-140929003930-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post

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0 Population genetics of maize domestication, adaptation, and improvement /slideshow/population-genetics-of-maize-domestication-adaptation-and-improvement/30880458 guelph-140205220459-phpapp02
The domestication of maize ~10,000 years ago resulted in dramatic differentiation from its wild ancestor teosinte. Subsequently, maize spread rapidly across the Americas, adapting to a number of new environments. Beginning in the 20th century, maize has also been subjected to intensive artificial selection by breeders. Each of these periods of adaptation have left their mark on patterns of genetic diversity. I will discuss some of our recent work using population genetics to learn about the history and process of adaptation in maize. ]]>
The domestication of maize ~10,000 years ago resulted in dramatic differentiation from its wild ancestor teosinte. Subsequently, maize spread rapidly across the Americas, adapting to a number of new environments. Beginning in the 20th century, maize has also been subjected to intensive artificial selection by breeders. Each of these periods of adaptation have left their mark on patterns of genetic diversity. I will discuss some of our recent work using population genetics to learn about the history and process of adaptation in maize. ]]> Wed, 05 Feb 2014 22:04:59 GMT /slideshow/population-genetics-of-maize-domestication-adaptation-and-improvement/30880458 jrossibarra@slideshare.net(jrossibarra) Population genetics of maize domestication, adaptation, and improvement jrossibarra The domestication of maize ~10,000 years ago resulted in dramatic differentiation from its wild ancestor teosinte. Subsequently, maize spread rapidly across the Americas, adapting to a number of new environments. Beginning in the 20th century, maize has also been subjected to intensive artificial selection by breeders. Each of these periods of adaptation have left their mark on patterns of genetic diversity. I will discuss some of our recent work using population genetics to learn about the history and process of adaptation in maize. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/guelph-140205220459-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds" /> The domestication of maize ~10,000 years ago resulted in dramatic differentiation from its wild ancestor teosinte. Subsequently, maize spread rapidly across the Americas, adapting to a number of new environments. Beginning in the 20th century, maize has also been subjected to intensive artificial selection by breeders. Each of these periods of adaptation have left their mark on patterns of genetic diversity. I will discuss some of our recent work using population genetics to learn about the history and process of adaptation in maize.

Population genetics of maize domestication, adaptation, and improvement from jrossibarra

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0 Bottlenecks -- some ramblings and a bit of data from maize PAGXXII /slideshow/bottlenecks-some-ramblings-and-a-bit-of-data-from-maize/29946136 pagbneck-140112233425-phpapp02
Some thoughts on bottlenecks and a bit of data from maize.]]>
Some thoughts on bottlenecks and a bit of data from maize.]]> Sun, 12 Jan 2014 23:34:25 GMT /slideshow/bottlenecks-some-ramblings-and-a-bit-of-data-from-maize/29946136 jrossibarra@slideshare.net(jrossibarra) Bottlenecks -- some ramblings and a bit of data from maize PAGXXII jrossibarra Some thoughts on bottlenecks and a bit of data from maize. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/pagbneck-140112233425-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds" /> Some thoughts on bottlenecks and a bit of data from maize.

Bottlenecks -- some ramblings and a bit of data from maize PAGXXII from jrossibarra

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0 Deleterious Alleles in maize, talk from PAGXXII /slideshow/deleterious-alleles-in-maize-for-pagxxii/29929887 pagdeleterious-140112105336-phpapp01
Talk on deleterious alleles in maize. From PAGXXII]]>
Talk on deleterious alleles in maize. From PAGXXII]]> Sun, 12 Jan 2014 10:53:36 GMT /slideshow/deleterious-alleles-in-maize-for-pagxxii/29929887 jrossibarra@slideshare.net(jrossibarra) Deleterious Alleles in maize, talk from PAGXXII jrossibarra Talk on deleterious alleles in maize. From PAGXXII <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/pagdeleterious-140112105336-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds" /> Talk on deleterious alleles in maize. From PAGXXII

Deleterious Alleles in maize, talk from PAGXXII from jrossibarra

]]> 1750 3 https://cdn.slidesharecdn.com/ss_thumbnails/pagdeleterious-140112105336-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post

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0 https://cdn.slidesharecdn.com/profile-photo-jrossibarra-48x48.jpg?cb=1683812045 https://cdn.slidesharecdn.com/ss_thumbnails/mgctopresent-180324080402-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/a-bad-genetic-history-of-maize/91777328 A bad genetic history ... https://cdn.slidesharecdn.com/ss_thumbnails/pag18ajb-180124220348-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/adaptation-in-plant-genomes-bigger-is-different/86659688 Adaptation in plant ge... https://cdn.slidesharecdn.com/ss_thumbnails/pag18pgen-180124220144-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/parallel-altitudinal-clines-reveal-adaptive-evolution-of-genome-size-in-zea-mays/86659577 Parallel Altitudinal C...