小麦中与小穗发育相关的三个基因的有利等位基因的遗传整合
Genetic Incorporation of the Favorable Alleles for Three Genes Associated With Spikelet Development in Wheat.
作者信息
Zhang Xiaojun, Qiao Linyi, Li Xin, Yang Zujun, Liu Cheng, Guo Huijuan, Zheng Jun, Zhang Shuwei, Chang Lifang, Chen Fang, Jia Juqing, Yan Liuling, Chang Zhijian
机构信息
State Key Laboratory of Sustainable Dryland Agriculture (in Preparation), College of Agronomy, Shanxi Agricultural University, Taiyuan, China.
Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, United States.
出版信息
Front Plant Sci. 2022 May 3;13:892642. doi: 10.3389/fpls.2022.892642. eCollection 2022.
The number of spikelets per spike is an important trait that directly affects grain yield in wheat. Three quantitative trait loci (QTLs) associated with spikelet nodes per spike (SNS) were mapped in a population of recombinant inbred lines generated from a cross between two advanced breeding lines of winter wheat based on the phenotypic variation evaluated over six locations/years. Two of the three QTLs are at the () loci and at the () loci. The allele with a 14-bp deletion at was associated with increased spikelets per spike. , as a novel allele at , were regulated at the transcript level that was associated with the SNS trait. The third SNS QTL, on chromosome 7D, was not associated with homoeologous or any other genes known to regulate SNS. The favorable alleles for each of , , and are identified and incorporated to increase up to 3.4 spikelets per spike in the RIL lines. Molecular markers for the alleles were developed. This study has advanced our understanding of the genetic basis of natural variation in spikelet development in wheat.
每穗小穗数是直接影响小麦产量的重要性状。基于在六个地点/年份评估的表型变异，在由两个冬小麦高级育种系杂交产生的重组自交系群体中，定位了三个与每穗小穗节数（SNS）相关的数量性状位点（QTL）。三个QTL中的两个位于（）位点和（）位点。在处具有14 bp缺失的等位基因与每穗小穗数增加相关。作为处的一个新等位基因，在转录水平上受到调控，这与SNS性状相关。第三个SNS QTL位于7D染色体上，与同源或任何其他已知调控SNS的基因无关。已鉴定并整合了、和的有利等位基因，以在重组自交系中使每穗小穗数增加多达3.4个。开发了这些等位基因的分子标记。本研究增进了我们对小麦小穗发育自然变异遗传基础的理解。
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