黄淮麦区部分小麦和国外引进小麦GS2等位基因的检测及其与农艺性状的关联分析

发布时间：2018-04-15 12:38

本文选题：小麦 + TaGS　；参考：《麦类作物学报》2016年03期

【摘要】：为明确黄淮麦区TaGS2等位基因的分布状况及其与主要农艺性状的关系,对黄淮麦区2008年之前育成的种质材料、新育成的品种(系)及国外引进材料,用TaGS2-A1、TaGS2-B1和TaGS2-D1等功能标记鉴定对应的基因,并结合相关农艺性状发掘优势单倍型。结果表明,黄淮麦区2008年之前育成的种质材料和新育成品种(系)中TaGS2等位基因分布频率存在一定的差异;TaGS2-A1b、TaGS2-B1b和TaGS2-D1a是优势TaGS2等位基因,TaGS2-A1b在小麦抽穗期、株高和小穗数的改良上是优势单倍型,但在新育成的品种(系)中有下降的趋势,TaGS2-D1a能够显著增加小穗数、穗粒数和穗粒重,在各类材料中的比例都较高;TaGS2-B1b是提高千粒重的优势单倍型。因此,在黄淮麦区小麦穗部性状改良中TaGS2-B1b和TaGS2-D1a的作用显著,尤其是TaGS2-D1a,同时黄淮麦区种植小麦遗传多样性在减少,一些优势单倍型未受到重视,应对地方品种和一些国外引进材料加以利用。
[Abstract]:In order to clarify the distribution of TaGS2 alleles and their relationship with main agronomic traits in Huang-Huai wheat region, germplasm materials, newly bred varieties (lines) and imported materials from other countries were collected before 2008 in Huang-Huai wheat region.TaGS2-A1 TaGS2-B1 and TaGS2-D1 were used to identify the corresponding genes and to explore the dominant haplotypes in combination with related agronomic traits.The results showed that there were some differences in the distribution frequency of TaGS2 alleles between the germplasm and newly bred varieties (lines) in Huang-Huai wheat region before 2008. TaGS2-A1b and TaGS2-D1a were the dominant TaGS2 alleles in heading stage of wheat.The improvement of plant height and spikelet number was dominant haplotype, but TaGS2-D1a could significantly increase spikelet number, grain number per spike and grain weight per spike in newly bred varieties (lines).The ratio of TaGS2-B1b in all kinds of materials is higher than that of other materials, which is the dominant haplotype to increase the 1000-grain weight.Therefore, TaGS2-B1b and TaGS2-D1a played a significant role in the improvement of ear traits of wheat in Huang-Huai wheat region, especially TaGS2-D1a, while the genetic diversity of wheat planted in Huang-Huai wheat region was decreased, and some dominant haplotypes were not paid attention to.Local varieties and some imported materials from abroad should be utilized.
【作者单位】：西北农林科技大学农学院;杨凌区种子站;
【基金】：国家重点基础研究计划项目(2014CB138100) 陕西省自然科学基金项目(2015JM3094) 陕西省重点科技创新团队资助项目(2014KCT-25)
【分类号】：S512.1

【共引文献】