Techniques of hybrid Cucurbitaceous
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This document discusses hybridization techniques for crops like tomato, chilli, and onion. It explains that hybridization is the process of crossing genetically dissimilar parents to create hybrids with benefits like greater productivity, longer harvests, and better tolerance to diseases. The most common hybridization technique is interspecies hybridization, which involves crossing between two species in the same genus. The document outlines the process of interspecies hybridization, which removes male flowers and uses chemicals to introduce female plants, but it is time-consuming and labor-intensive. Future advances in biotechnology may help overcome the current limitations.
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The document discusses hybridization, including interspecific and intraspecific processes, and techniques like emasculation, bagging, and tagging. It covers various types of hybridization such as intervarietal, double cross, three-way cross, and triple cross hybrids, detailing their production methods and advantages. Additionally, it mentions specific examples of hybrid plants and ongoing research on developing resistant varieties.Heterosis breeding in Vegetables
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This document provides information about the development of hybrid varieties in maize. There are three main steps: 1) Developing inbred lines through continued self-pollination over multiple generations, selecting for desirable traits. 2) Evaluating inbred line performance in test crosses and single crosses to identify high-yielding combinations. 3) Producing hybrid seed by planting parental inbred lines in isolation and removing pollen from the female parent to ensure cross-pollination and high genetic purity of the seed. Hybrid varieties take advantage of heterosis and offer benefits like increased yield and uniformity compared to open-pollinated varieties.Hybridisation
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The document provides an overview of hybridisation, detailing its definition, historical context, and procedures involved, including emasculation, bagging, and tagging. It outlines various techniques such as intervarietal and distant hybridisation, along with examples of hybrid plants. Notably, the hybrid 'fatshedera lizei' serves as an example of a successful cross between different species.Distant hybridization
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Distant hybridization involves crossing individuals from different plant species or genera. It has been used to transfer desirable traits like disease resistance between crops. Some key challenges include hybrid sterility and incompatible crosses due to genetic differences between parental species. Techniques like embryo rescue and colchicine treatment have helped produce new crops through wide crosses, such as Nerica rice and triticale wheat-rye hybrids. Distant hybridization remains limited by barriers like hybrid breakdown but has achieved successes in improving crop varieties.Production of inbred lines & hybrid variety
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Techniques of hybrid Cucurbitaceous
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- 2. Prepared By: Suvro Basak Reg. No. : 11-04633 Faculty Of Agribusiness Management Sher-e-Bangla Agricultural University, Dhaka 2
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- 4. 4 Introduction Male Sterility Tomato Chilli Onion Self Incompatibility Cauliflower Radish Conclusion Future thrust 4 Hybridization Floral Biology Hybridization Technique Interspecies hybridization Limitation Future 4
- 5. Hybridization 5 Hybridization is the process of forming a hybrid or number of hybrids by crossing between two genetically dissimilar homozygous parents for the betterment for human being.
- 6. Greater productivity Longer harvest duration Better adaptability to variable environments Better tolerance to diseases and pests Uniform produce Better market acceptability Better nutritional quality 6
- 8. Hybridization Technique The most commonly utilized mechanisms for developing commercial cucurbitaceous crops is interspecies hybridization 8
- 10. Interspecies hybridization Crossing between two species belonging to the same genus. Cucumis hardwickii Cucumis trigonus Cucumis melo 10
- 11. Process Remove male flower Late male flowering Use chemical (250ppm Ethophenol) Introduce of female plant 11
- 12. Limitations Interspecies hybridization Time consuming Labour intensive (Skill is necessary for commercial seed production) Increased cost of production 12
- 13. In the light of rapid advancement of bio-technology, it may be this systems can be increasingly utilized in near future. Future 13
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