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Mapping Quantitative Trait Loci for Important Agronomic Traits and Developing Potential Near-Isogenic Lines in Wheat

文献类型： 外文期刊

作者： Yan, Xue 1 ; Sun, Daizhen 1 ; Li, Runzhi 1 ; Wang, Shuguang 1 ; Ma, Gang 2 ; Cao, Yaping 2 ; Yang, Bin 2 ; Jing, Ruilian 3 ;

作者机构： 1.Shanxi Agr Univ, Coll Agron, Taigu 030801, Shanxi, Peoples R China

2.Shanxi Acad Agr Sci, Wheat Res Inst, Linfen 041000, Shanxi, Peoples R China

3.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

关键词： Wheat; Agronomic traits; Introgression Lines; Marker assisted selection; QTL

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2019 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Tailoring wheat cultivars with good agronomic traits and high yield has always been the objective of breeders. However, most of these traits are quantitative. Therefore, it is of great significance to excavate the stable quantitative trait loci (QTL) associated with agronomic characters of wheat for marker assisted selection (MAS) breeding. In the current study, 160BC(3)F(3) introgression lines (ILs) from Lumai14 and Jing411 were used for a linkage map construction. Quantitative trait loci (QTL) for 10 agronomic traits, including heading date (HD), plant height (PH), first internode length (FIL), length from flag leaf pulvinus to spike base (LPSB), spike length (SL), number of valid tillers (NT), fertile spikelet number per main spike (FSN), grain number per main spike (GNS), grain weight per plant (GWP) and thousand grain weight (TGW) were mapped under six environments. One hundred and fifty six SSR markers were anchored in the linkage map of the ILs and every chromosome contained 7.42 markers in average. A total of 46 QTLs for the above traits were identified on all chromosomes except for 2D and 5D. Among them, QHd-7D, QFil-4A, QLpsb-4A-1, QSl-1D-2 and QFsn-7B were detected in 2, 2, 2, 4 and 3 environments, respectively. In addition, 10 QTL clusters were also found. Moreover, analysis of genetic background for 160 lines found that the IL 30 and IL 86 contained 4 and 3 introgressed chromosomal segments from donor parent, Jing411, respectively, and one of these donor segments harbored QFil-4A for FIL and QLpsb-4A-1 for LPSB. So the two lines and the recurrent parent, Lumai14, can be regarded as potential near-isogenic lines for further fine mapping. (C) 2019 Friends Science Publishers

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