数字农科院2.0

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

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

作者机构：

关键词： Gene ontology analysis;Genome-wide association study;Maize;P stress;Phosphorus use efficiency;Phylogenetic characterization

期刊名称： International Journal of Molecular Sciences

ISSN： 1661-6596

年卷期： 2021 年 22.0 卷 17.0 期

页码：

收录情况： JCR（2021版）

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-re-lated 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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