| 著者 |
Andi Madihah Manggabarani, Takuyu Hashiguchi, Masatsugu Hashiguchi, Atsushi Hayashi, Masataka Kikuchi, Yusdar Mustamin, Masaru Bamba, Kunihiro Kodama, Takanari Tanabata, Sachiko Isobe, Hidenori Tanaka, Ryo Akashi, Akihiro Nakaya, Shusei Sato
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| Abstract |
As soybean cultivars are adapted to a relatively narrow range of latitude, the effects of climate changes are estimated to be severe. To address this issue, it is important to improve our understanding of the effects of climate change by applying the simulation model including both genetic and environmental factors with their interactions (G×E). To achieve this goal, we conducted the field experiments for soybean core collections using multiple sowing times in multi-latitudinal fields. Sowing time shifts altered the flowering time (FT) and growth phenotypes, and resulted in increasing the combinations of genotypes and environments. Genome-wide association studies for the obtained phenotypes revealed the effects of field and sowing time to the significance of detected alleles, indicating the presence of G×E. By using accumulated phenotypic and environmental data in 2018 and 2019, we constructed multiple regression models for FT and growth pattern. Applicability of the constructed models was evaluated by the field experiments in 2020 including a novel field, and high correlation between the predicted and measured values was observed, suggesting the robustness of the models. The models presented here would allow us to predict the phenotype of the core collections in a given environment.
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