欢迎访问《麦类作物学报》编辑部网站

作者	单位
宋科峰，邢远航，赵慧玲，张传量，李月月，宋鹏博，赵文莎，张傲琰，简俊涛，孙道杰	（1.西北农林科技大学农学院,陕西杨凌 712100； 2.南阳市农科院,河南南阳 473000）

摘要点击次数: 409

全文下载次数: 124

中文摘要:

为解析小麦产量相关农艺性状遗传规律，对319份小麦材料进行16K SNP芯片检测，通过全基因组关联分析（GWAS）方法，对株高、穗长、每穗小穗数、千粒重、粒长、粒宽和粒长宽比共7个产量相关性状进行了5个环境下的相关分析。结果表明，7个性状均表现出广泛的表型变异，变异系数为5.97%~15.77%，广义遗传力为82.42%~96.62%。在5个环境中，共检测到98个显著且稳定的SNP位点，表型变异解释率为2.9%~12.1%，其中1D-325966494、2D-645942075、7D-166300030共3个SNP位点表现出多效性。通过单倍型分析，获得2个显著降低株高的优异单倍型，它们分别位于2A和3A染色体特定区域。筛选到1个与株高相关的候选基因TraesCS2A02G457400，其功能尚未明确。

英文摘要:

To analyze the genetic rules of agronomic traits related to wheat yield, in this study, 319 wheat materials and 16K SNP array data were utilized. Through the method of genome-wide association study(GWAS), seven yield-related traits, namely plant height, spike length, number of spikelets per spike, 1 000-grain weight, grain length, grain width, and grain length-to-width ratio, were analyzed in five environments. The results showed that all the seven traits exhibited extensive phenotypic variations, with the coefficient of variation ranging from 5.97% to 15.77%, and the broad-sense heritability ranging from 82.42% to 96.62%. The results of the genome-wide association analysis indicated that a total of 98 significant and stable SNP loci were detected in five environments, explaining 2.9% to 12.1% of the phenotypic variations. Among them, three SNP loci, namely 1D-325966494, 2D-645942075, and 7D-166300030, showed pleiotropy. Through haplotype analysis, two excellent haplotypes that significantly reduced the plant height were obtained, which were located in specific regions of chromosomes 2A and 3A. One candidate gene TraesCS2A02G457400 related to plant height was identified, and its function has not been clarified yet.

查看全文查看/发表评论下载PDF阅读器

关闭