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Identification of QTL for leaf angle at canopy-wide levels in maize

文献类型： 外文期刊

作者： Tang, Dengguo 1 ; Chen, Zhengjie 1 ; Ni, Jixing 1 ; Jiang, Qin 1 ; Li, Peng 1 ; Wang, Le 1 ; Zhou, Jinhong 1 ; Li, Chenya 1 ;

作者机构： 1.Sichuan Agr Univ, Maize Res Inst, 211 Huimin Rd, Chengdu 611130, Sichuan, Peoples R China

2.Sichuan Acad Agr Sci, Ind Crop Res Inst, 159 Huajin Ave, Chengdu 610300, Sichuan, Peoples R China

关键词： Leaf angle; Eight leaves; Canopy architecture; QTL; QTL  ×   environment interactions; Epistatic interactions; Zea mays

期刊名称：EUPHYTICA （ 影响因子：1.614； 五年影响因子：1.883 ）

ISSN： 0014-2336

年卷期： 2021 年 217 卷 4 期

页码：

收录情况： SCI

摘要： Leaf angle (LA) is one of the most important canopy architecture related traits in maize (Zea mays L.). However, the genetic basis of LA at canopy-wide levels is still not completely understood. In this study, one RIL population derived from two parent lines with distinct plant architecture was used for QTL mapping of LA at eight leaves below the tassel across three environments. Fifty-six QTL for LA of eight leaves were identified in single environment analysis and 44 QTL for LA of eight leaves were detected in joint analysis. Among them, nine common QTL were identified because they were detected for LA more than 1 leaves or in 2 or 3 environments. The single QTL could explain 1.29-20.14% of the phenotypic variation with affecting LA of 1-8 leaves, included qLA5.1 affected LA of all eight leaves, qLA3.1 affected LA of the upper leaves (1stLA-4thLA), and qLA9.1 affected LA of the lower leaves (5thLA-8thLA). Furthermore, the 8thLA was mainly affected by major and minor QTL; the 1stLA, 4thLA and 5thLA were affected by major QTL, minor QTL and epistatic interactions; the other four LAs were simultaneously affected by major QTL, minor QTL, epistatic interactions and environments, inferred that the genetic architecture of LA of eight leaves was different. These results provide a comprehensive understanding of genetic basis of LA at canopy-wide levels, which will be helpful to design the ideal plant architecture in maize.

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