Genetic Dissection of Phosphorus Use Efficiency in a Maize Association Population under Two P Levels in the Field

文献类型： 外文期刊

第一作者： Li, Dongdong

作者： Li, Dongdong;Wang, Haoying;Wang, Meng;Li, Guoliang;Lu, Xiaohuan;Wang, Ming;Chen, Shaojiang;Liu, Wenxin;Chen, Zhe;Chen, Fanjun;Yuan, Lixing;Leiser, Willmar L.;Weiss, Thea Mi;Weiss, Thea Mi;Wuerschum, Tobias;Lu, Xiaohuan

作者机构：

关键词： maize; P stress; phosphorus use efficiency; genome-wide association study; gene ontology analysis; phylogenetic characterization

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.924； 五年影响因子：6.132 ）

ISSN：

年卷期： 2021 年 22 卷 17 期

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收录情况： SCI

摘要： Phosphorus (P) deficiency is an important challenge the world faces while having to increase crop yields. It is therefore necessary to select maize (Zea may L.) genotypes with high phosphorus use efficiency (PUE). Here, we extensively analyzed the biomass, grain yield, and PUE-related traits of 359 maize inbred lines grown under both low-P and normal-P conditions. A significant decrease in grain yield per plant and biomass, an increase in PUE under low-P condition, as well as significant correlations between the two treatments were observed. In a genome-wide association study, 49, 53, and 48 candidate genes were identified for eleven traits under low-P, normal-P conditions, and in low-P tolerance index (phenotype under low-P divided by phenotype under normal-P condition) datasets, respectively. Several gene ontology pathways were enriched for the genes identified under low-P condition. In addition, seven key genes related to phosphate transporter or stress response were molecularly characterized. Further analyses uncovered the favorable haplotype for several core genes, which is less prevalent in modern lines but often enriched in a specific subpopulation. Collectively, our research provides progress in the genetic dissection and molecular characterization of PUE in maize.

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