Genome-Wide Association Study Reveals the QTLs for Seed Storability in World Rice Core Collections
Fangxi Wu,
Xi Luo,
Lingqiang Wang,
Yidong Wei,
Jianguo Li,
Huaan Xie,
Jianfu Zhang,
Guosheng Xie
Affiliations
Fangxi Wu
Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
Xi Luo
Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
Lingqiang Wang
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
Yidong Wei
Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
Jianguo Li
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, Guangxi University, Nanning 530004, China
Huaan Xie
Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
Jianfu Zhang
Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
Guosheng Xie
MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
Seed storability is a main agronomically important trait to assure storage safety of grain and seeds in rice. Although many quantitative trait loci (QTLs) and associated genes for rice seed storability have been identified, the detailed genetic mechanisms of seed storability remain unclear in rice. In this study, a genome-wide association study (GWAS) was performed in 456 diverse rice core collections from the 3K rice genome. We discovered the new nine QTLs designated as qSS1-1, qSS1-2, qSS2-1, qSS3-1, qSS5-1, qSS5-2, qSS7-1, qSS8-1, and qSS11-1. According to the analysis of the new nine QTLs, our results could well explain the reason why seed storability of indica subspecies was superior to japonica subspecies in rice. Among them, qSS1-2 and qSS8-1 were potentially co-localized with a known associated qSS1/OsGH3-2 and OsPIMT1, respectively. Our results also suggest that pyramiding breeding of superior alleles of these associated genes will lead to new varieties with improved seed storability in the future.
