Phenotypic characterization of the International Wheat Yield Partnership-Hub (IWYP-HUB) panels
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ArticleLanguage: English Publication details: Mexico : CIMMYT, 2017.Subject(s):
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Proceedings of the 3rd International TRIGO Wheat Yield Potential p. 64-73Summary: Systematic screening of genetic resources from a number of different sources, including IWIN nurseries, materials from physiological traits (PT) crosses, mapping populations, exotic genetic resources including landraces, durums and primary synthetic hexaploids, enabled the selection of lines that were included in a set of different panels that represented the core material for research conducted at IWYP-HUB. Almost 1,500 accessions from the different panels were phenotyped to identify lines with "source" and "sink" complementary traits to be incorporated in the pre-breeding pipeline. In addition, these panels were the base of various IWYP research projects. These populations were grown at the IWYP-HUB in Cd. Obregon, NW Mexico, during 2015-2016 for physiological and agronomic characterization and additional genetic analyses were carried out (Sukumaran et al., 2017, these proceedings). The present study shows that between 73 to 93% of the lines were comprised in a phenological range of 10 days for anthesis date. This effect was taken into account and experimental designs were used to block lines of different phenology classes. High genetic variation in final biomass was observed in all the panels, and lines showing almost 50% more biomass than the check with the highest biomass (Sokoll) were identified. However, a trade-off with HI was observed in the panels with high BM. Wide genotypic variation was observed for all partitioning traits in the studied panels, highlighting the correlation between HI and YLD in all panels. As previously demonstrated in a set of elite lines, the investment in internodes 2 and 3 and stems+lamina was negatively correlated with yield and HI, while SPI was positively correlated in most panels, suggesting competition for resources during spike development and the impact on grain yield. Regarding source:sink balance, adaptation to density (ADi) was highly correlated with yield, biomass and number of grains per m2, indicating that lines better adapted to density have higher yield potential.
| Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|
| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | Available |
Open Access
Systematic screening of genetic resources from a number of different sources, including IWIN nurseries, materials from physiological traits (PT) crosses, mapping populations, exotic genetic resources including landraces, durums and primary synthetic hexaploids, enabled the selection of lines that were included in a set of different panels that represented the core material for research conducted at IWYP-HUB. Almost 1,500 accessions from the different panels were phenotyped to identify lines with "source" and "sink" complementary traits to be incorporated in the pre-breeding pipeline. In addition, these panels were the base of various IWYP research projects. These populations were grown at the IWYP-HUB in Cd. Obregon, NW Mexico, during 2015-2016 for physiological and agronomic characterization and additional genetic analyses were carried out (Sukumaran et al., 2017, these proceedings). The present study shows that between 73 to 93% of the lines were comprised in a phenological range of 10 days for anthesis date. This effect was taken into account and experimental designs were used to block lines of different phenology classes. High genetic variation in final biomass was observed in all the panels, and lines showing almost 50% more biomass than the check with the highest biomass (Sokoll) were identified. However, a trade-off with HI was observed in the panels with high BM. Wide genotypic variation was observed for all partitioning traits in the studied panels, highlighting the correlation between HI and YLD in all panels. As previously demonstrated in a set of elite lines, the investment in internodes 2 and 3 and stems+lamina was negatively correlated with yield and HI, while SPI was positively correlated in most panels, suggesting competition for resources during spike development and the impact on grain yield. Regarding source:sink balance, adaptation to density (ADi) was highly correlated with yield, biomass and number of grains per m2, indicating that lines better adapted to density have higher yield potential.
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