Genome-wide association study identifies a gene conferring high physiological phosphorus use efficiency in rice

文献类型： 外文期刊

第一作者： Yan, Ming

作者： Yan, Ming;Feng, Fangjun;Xu, Xiaoyan;Fan, Peiqing;Lou, Qiaojun;Chen, Liang;Zhang, Anning;Luo, Lijun;Mei, Hanwei;Yan, Ming;Feng, Fangjun;Xu, Xiaoyan;Lou, Qiaojun;Chen, Liang;Zhang, Anning;Luo, Lijun;Mei, Hanwei

作者机构： Shanghai Acad Agr Sci, Shanghai Agrobiol Gene Ctr, Shanghai, Peoples R China;Minist Agr & Rural Affairs, Key Lab Grain Crop Genet Resources Evaluat & Utili, Shanghai, Peoples R China

关键词： GWAS; OsAAD; physiological phosphorus use efficiency; biomass; grain yields

期刊名称：FRONTIERS IN PLANT SCIENCE （ 2022影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Phosphate (Pi) is indispensable for the growth and development of plant, and low-Pi stress is a major limitation for crop growth and yield worldwide. The tolerance to low-Pi stress varied among rice germplasm resources. However, the mechanisms underlying the tolerance of rice to low-Pi stress, as a complex quantitative trait, are not clear. We performed a genome-wide association study (GWAS) through a diverse worldwide collection of 191 rice accessions in the field under normal-Pi and low-Pi supply in two years. Twenty and three significant association loci were identified for biomass and grain yield per plant under low-Pi supply respectively. The expression level of OsAAD as a candidate gene from a associated locus was significantly up-regulated after low-Pi stress treatment for five days and tended to return to normal levels after Pi re-supply in shoots. Suppression of OsAAD expression could improve the physiological phosphorus use efficiency (PPUE) and grain yields through affecting the expression of several genes associated with GA biosynthesis and metabolism. OsAAD would be a promising gene for increasing PPUE and grain yield in rice under normal- and low-Pi supply via genome editing.

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