Analysis of genetic mechanism determining the crop environmental response by coordinating crop growth model and genetic model

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The crop genotypes and environment interaction has long been a major field of the study in both breeding and crop physiology, and will become more important in the future under climate change. Up to now, the effects of genotypes and environments on crop phenotypes are analyzed rather independently, but should be analyzed more interactively. In this study, we grew 174 rice genotypes derived form Koshihikari/Kasalath whose genetic information is known at five sites that are widely different in their growth environments. We then analyzed environmental responses of heading stage with a new analytical method coupling crop growth model and genetic model. This proposed method detected specific regions of chromosomes that are linked to environmental responses of heading, some of which could not be detected with a conventional method using single-environment data, so can be used to bridge gaps between genes and environmental responses of the crop.