Parallel session 2 1 modeling the dynamics of starch content in cassava_patricia_moreno
- 1. www.iita.org | www.cgiar.org | www.acai-project.org Update on PhD: Modeling the dynamics of starch content in cassava Patricia Moreno-Cadena
- 2. OUTPUTS INPUT FACTORS GLOBAL SENSITIVITY ANALYSIS A B C A B C Apportions output variance into input factors UNCERTAINTY ANALYSIS Propagates input factor variability into output Uncertainty *Adapted from Mu単oz-Carpena, 2017: Advanced modeling system class time Yield Importance of genetic parameters and uncertainty 16 crop parameters
- 3. Importance of genetic parameters and uncertainty www.iita.org | www.cgiar.org | www.acai-project.org Parameter Parameter description PDF n Source of parameter values B01ND Thermal time from planting to first branching (属Cd) Triangular 22 (Bola単os, 1987; Irikura et al., 1979; Lian and Cock, 1979; Veltkamp, 1986) B12ND Mean thermal time between branching levels after the first branching (属Cd) Triangular 22 (Bola単os, 1987; Irikura et al., 1979; Lian and Cock, 1979; Veltkamp, 1986) LAXS Maximum individual leaf area (cm2) Lognormal 60 (Alves, 2002; Alves and Setter, 2004, 2000; Ceballos and Cruz, 2012; CIAT, 1975, 1978; Connor et al., 1981; Gabriel et al., 2014; Irikura et al., 1979; Keating et al., 1982; Lian and Cock, 1979; Matthews and Hunt, 1994; Okogbenin et al., 2013; Pellet and El-Sharkawy, 1993; Pinheiro et al., 2014; Santhosh Mithra et al., 2013; Streck et al., 2014; Veltkamp, 1986) SLAS Specific leaf area (cm2/g) Normal 22 (Fukai and Hammer, 1987; Gabriel et al., 2014; Gijzen et al., 1990; Keating et al., 1982; Matthews and Hunt, 1994; Pellet and El-Sharkawy, 1993; Rosenthal and Ort, 2012; Vandegeer et al., 2013) LLIFA Active leaf area duration in thermal time (属Cd) after full expansion Weibull 338 (Alves, 2002; Bola単os, 1987; CIAT, 1978; Connor et al., 1981; Fukai and Hammer, 1987; Howeler, 2012; Irikura et al., 1979; Lian and Cock, 1979; Veltkamp, 1986) LPEFR Leaf-petiole weight fraction (-) Gamma 337 (Cadavid, 1988; CIAT, 2013a; Cock, 2011; De Tafur et al., 1994; Fukai and Hammer, 1987) LNSLP Leaf appearance slope (-) as proportion of the leaf appearance curve of reference Uniform 0 NODWT Individual node weight (g) Weibull 72 (CIAT. Unpublished results., n.d.; CIAT, 2013b; Lian and Cock, 1979; Porto, 1983) NODL Internode length (cm) Lognormal 55 (CIAT. Unpublished results., n.d.) PARUE Radiation use efficiency (g dry matter MJ- 1) Lognormal 27 (De Souza et al., 2016; El-Sharkawy and Mejia de Tafur, 2010; Ezui, 2017; Leepipatpaiboon et al., 2009; Pellet and El-Sharkawy, 1997; Veltkamp, 1986; Yamamoto et al., 2004) TBLSZ Base temperature for leaf development (C) Uniform 3 (Fukai and Hammer, 1987; Keating et al., 1982; Manrique, 1992) BR1F-BR4F Branch number per fork at fork 1-4 (#) Uniform 2e (Ceballos and Cruz, 2012; Lian and Cock, 1979) KCAN Photosynthetically active radiation (PAR) extinction parameter (-) Uniform 12 (Cock, 2011; Ezui, 2017; Fukai and Hammer, 1987; June, 1993; Pellet and El-Sharkawy, 1993; Veltkamp, 1986)
- 4. Importance of genetic parameters and uncertainty www.iita.org | www.cgiar.org | www.acai-project.org Enhanced Sampling for Uniformity (eSU) Qualitative analysis (408 parameter combinations)
- 5. Importance of genetic parameters and uncertainty www.iita.org | www.cgiar.org | www.acai-project.org Sobol Quantitative (15360 parameter combinations)
- 6. Model calibration and evaluation www.iita.org | www.cgiar.org | www.acai-project.org PhD Candidate Joy Adiele (NOT trials-Nigeria) TME 419 Simulated vs. observed harvest weight for the variety TMS 419 in 39 NOT trials
- 7. Model calibration and evaluation www.iita.org | www.cgiar.org | www.acai-project.org PhD Candidate Rebecca Enesi (SPT trials) TMS 0581- TME 419
- 8. Model calibration and evaluation www.iita.org | www.cgiar.org | www.acai-project.org PhD Candidate Rebecca Enesi (SPT trials) TMS 0581- TME 419
- 9. Next steps www.iita.org | www.cgiar.org | www.acai-project.org Evaluate the performance of the cassava model in Tanzania Adding algorithms to modify dry matter content From dry weight to fresh weight.