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Characterization of a wheat stable QTL for spike length and its genetic effects on yield-related traits

文献类型： 外文期刊

作者： Ding, Hongke 1 ; Wang, Chenyang 1 ; Cai, Yibiao 1 ; Yu, Kai 2 ; Zhao, Haibo 2 ; Wang, Faxiang 1 ; Shi, Xinyao 1 ; Cheng, Jiajia 1 ; Sun, Han 1 ; Wu, Yongzhen 1 ; Qin, Ran 1 ; Liu, Cheng 3 ; Zhao, Chunhua 1 ; Sun, Xiaohui 4 ; Cui, Fa 1 ;

作者机构： 1.Ludong Univ, Univ Shandong, Coll Agr, Key Lab Mol Module Based Breeding High Yield & Abi, Yantai 264025, Peoples R China

2.Yantai Agr Technol Extens Ctr, Yantai 264001, Peoples R China

3.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Peoples R China

4.Yantai Acad Agr Sci, Yantai 265500, Shandong, Peoples R China

关键词： Wheat (Triticum aestivum L.); Spike length; QTL; Molecular markers; Genetic effect analysis; Breeding selection effect

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.3； 五年影响因子：5.9 ）

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Spike length (SL) is one of the most important agronomic traits affecting yield potential and stability in wheat. In this study, a major stable quantitative trait locus (QTL) for SL, i.e., qSl-2B, was detected in multiple environments in a recombinant inbred line (RIL) mapping population, KJ-RILs, derived from a cross between Kenong 9204 (KN9204) and Jing 411 (J411). The qSl-2B QTL was mapped to the 60.06-73.06 Mb region on chromosome 2B and could be identified in multiple mapping populations. An InDel molecular marker in the target region was developed based on a sequence analysis of the two parents. To further clarify the breeding use potential of qSl-2B, we analyzed its genetic effects and breeding selection effect using both the KJ-RIL population and a natural mapping population, which consisted of 316 breeding varieties/advanced lines. The results showed that the qSl-2B alleles from KN9204 showed inconsistent genetic effects on SL in the two mapping populations. Moreover, in the KJ-RILs population, the additive effects analysis of qSl-2B showed that additive effect was higher when both qSl-2D and qSl-5A harbor negative alleles under LN and HN. In China, a moderate selection utilization rate for qSl-2B was found in the Huanghuai winter wheat area and the selective utilization rate for qSl-2B continues to increase. The above findings provided a foundation for the genetic improvement of wheat SL in the future via molecular breeding strategies. A major stable QTL for spike length was identified in wheat, and its genetic effect on yield related-traits as well as its potential use value in molecular breeding programs were characterized.

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