冬小麦抗旱种质资源遗传多样性研究  

Genetic Diversity of Winter Wheat Germplasm Resources with Drought-Resistance

作　　者：王淑英[1] 樊廷录[1] 李兴茂[1] 

机构地区：[1]甘肃省农业科学院

出　　处：《麦类作物学报》2008年第3期402-409,共8页Journal of Triticeae Crops

基　　金：“十一五”国家科技支撑计划项目(2006BAD29B07);黄土高原土壤侵蚀与旱地农业国家重点实验室项目(10501-162)

摘　　要：为了给小麦抗旱育种的亲本选配提供理论依据,应用Shannon-weaver多样性指数和非加权配对算术平均聚类法(UPGMA)分析了42份冬小麦抗旱种质资源在6个农艺性状及4个抗旱生理指标(灌浆前期、中期、后期冠层温度和水分利用效率)水平上的遗传多样性,同时进行了聚类分析。结果表明,冬小麦灌浆前期和后期冠层温度、小穗数和产量的多样性指数较大,分别为1.96、2.03、2.01、1.94;灌浆前期冠层温度、水分利用效率、小穗数、穗粒数和产量的变异系数较大,分别为13.18%、11.55%、11.87%、11.43%和10.96%;供试材料可分为6个类群,国外材料间的欧氏遗传距离(4.46)大于国内材料间的欧氏遗传距离(3.66)。Data of 42 winter wheat with drought-resistance, were analyzed to study the genetic diversity of winter wheat germplasm resources in six agronomic traits and four physiological indicators rela- tive to drought-resistance, using Weaver-shannon diversity index and non-matching weighted arithme- tic mean clustering method （UPGMA） for supplying information on selection of male and female parents in drought resistance and water-saving breeding. Preliminary results showed that the diversity in- yield were relatively large; variant coefficient of canopy temperature in early-filling stage, water use efficiency, the number of spikelet and seeds per spike, and the output of grain is comparatively large. Genetic distance between varieties was calculated using DPS data analysis software. The systematic cluster analysis of genetic distance showed that 42 experimental materials could be divided into six groups. between drought sistance The mean Euclidean genetic distance between foreign materials （4.46） was larger than that domestic materials （3. 66）. Therefore, foreign winter wheat germplasm resources with resistance should be introduced actively and used fully to broaden genetic base for drought resistance and water-saving breeding of winter wheat and to improve breeding efficiency.

关 键 词：冬小麦 种质资源 遗传多样性 

分 类 号：S512.1[农业科学—作物学] S324