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Identification of QTLs and joint QTL segments of leaflet traits at different canopy layers in an interspecific RIL population of soybean

文献类型： 外文期刊

作者： Zeng, Jian 1 ; Li, Meng 1 ; Qiu, Hongmei 6 ; Xu, Yufei 1 ; Feng, Beibei 1 ; Kou, Fangyuan 1 ; Xu, Xianchao 1 ; Razzaq, Muhammad Khuram 1 ; Gai, Junyi 1 ; Wang, Yueqiang 6 ; Xing, Guangnan 1 ;

作者机构： 1.Nanjing Agr Univ, Soybean Res Inst, Nanjing, Peoples R China

2.Nanjing Agr Univ, MARA Natl Ctr Soybean Improvement, Nanjing, Peoples R China

3.Nanjing Agr Univ, MARA Key Lab Biol & Genet Improvement Soybean, Nanjing, Peoples R China

4.Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing, Peoples R China

5.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing, Peoples R China

6.Jilin Acad Agr Sci, Changchun, Peoples R China

7.Natl Engn Res Ctr Soybean, Changchun, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.574； 五年影响因子：5.662 ）

ISSN： 0040-5752

年卷期： 2022 年 135 卷 12 期

页码：

收录情况： SCI

摘要： Key message A leaflet trait on different canopy layers may have different QTLs; leaflet trait QTLs may cluster to form joint QTL segments; all canopy layer QTLs form a complete QTL system for a leaflet trait. As the main part of the plant canopy structure, leaf/leaflet size and shape affect the plant architecture and yield. To explore the leaflet trait QTL system, a population composed of 199 recombinant inbred lines derived from Changling (annual wild, narrow leaflet) and Yiqianli (landrace, broad leaflet) with their parents was tested for leaflet length (LL), width (LW) and length to width (LLW). The population was genotyped with specific-locus amplified fragment sequencing (SLAF-seq) and applied for linkage mapping of the leaflet traits. The results showed that the leaflet traits varied greatly even within a plant, which supported a stratified leaflet sampling strategy to evaluate these traits at top, middle and bottom canopy layers. Altogether, 13 LL, 10 LW and 9 LLW in a total of 32 plus 3 duplicated QTLs were identified, in which, 17 QTLs were new ones, and 48.6%, 28.6% and 22.8% of QTLs were from the top, middle and bottom layers, respectively, indicating the genetic importance of the top layer leaves. Since a leaflet trait may have layer-specific QTLs, all layer QTLs form a complete QTL system. Five QTL clusters each with their QTL supporting intervals overlapped were designated as joint QTL segments (JQSs). In JQS-16, with its linkage map further validated using PCR markers, two QTLs, qLW-16-1 and qLLW-16-1 of the top layer leaflet, were identified six QTL center dot times. Six candidate genes were predicted, with Glyma.16G127900 as the most potential one for LW and LLW. Three PCR markers, Gm16PAV0653, BARCSOYSSR_16_0796 and YC-16-3, were suggested for marker-assisted selection for LW and LLW in JQS-16.

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