Quantitative trait loci mapping for heading date and spikelet number in wheat (Triticum aestivum L.)based on two recombinant inbred line populations
文献类型： 外文期刊
作者： Hu, Wenjing 1 ; Zhu, Dongmei 3 ; Zhang, Yu 4 ; Liu, Jiang 3 ; Zhao, Die 3 ; Liao, Sen 3 ; Jia, Jizeng 5 ; Xu, Weigang 4 ;
作者机构： 1.Henan Agr Univ, Coll Agron, Zhengzhou 450046, Henan, Peoples R China
2.Henan Agr Univ, Ctr Crop Genome Engn, Zhengzhou 450046, Henan, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Wheat Biol & Genet Improvement Low & Midd, Lixiahe Inst Agr Sci, Yangzhou 225007, Jiangsu, Peoples R China
4.Henan Acad Agr Sci, Zhengzhou 450002, Peoples R China
5.Chinese Acad Agr Sci CAAS, Inst Crop Sci, Beijing 100081, Peoples R China
关键词： Candidate genes; Heading date; KASP; QTL mapping; Total spikelet number per spike; Triticum aestivum L
期刊名称：GENETIC RESOURCES AND CROP EVOLUTION （ 影响因子：1.876； 五年影响因子：1.864 ）
ISSN： 0925-9864
年卷期：
页码：
收录情况： SCI
摘要： Heading date (HD) and total spikelet number per spike (SNS) play important roles in the yield improvement of wheat. HD often influences the formation of total spikelets. Identifying various genes that control HD and SNS is vital for the yield improvement of wheat. Here, we used two recombinant inbred line (RIL) populations derived from crosses of Yangmai 12 (YM12)/Yanzhan 1 (YZ1) and Yangmai 4 (YM4)/YZ1 to construct two genetic linkage maps and identify QTL for HD and SNS. A total of sixteen QTL were detected, among which three QTL for HD and three QTL for SNS detected in the YM12/YZ1 population overlapped those detected in the YM4/YZ1 population, respectively. Two pleiotropic QTL regions (Cluster-2B and Cluster-7D) simultaneously controlling HD and SNS were detected in both two populations. Among the QTL for SNS, only the favored allele of QSns.Y12Y-2A/QSns.Y4Y-2A had a significantly positive effect on grain number per spike without negatively affecting thousand-grain weight. A kompetitive allele-specific PCR (KASP) marker for QSns.Y12Y-2A/QSns.Y4Y-2A had been developed and verified in a set of 256 diverse cultivars/lines to facilitate its applications. Then the genes within the physical interval of QSns.Y12Y-2A/QSns.Y4Y-2A were analyzed based on the spatiotemporal expression patterns, gene annotation, and orthologous search. Six candidate genes were expressed specially in spike or spikelet. These results provide a solid foundation for future fine mapping and cloning of QSns.Y12Y-2A/QSns.Y4Y-2A.
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