干旱地区农业研究2017，Vol.35Issue(6)：95-103,9.DOI:10.7606/j.issn.1000-7601.2017.06.15
宁夏春小麦抗旱性的遗传多样性分析
Genetic diversity of spring wheat germplasm resources based on drought resistance in Ningxia
摘要
Abstract
In order to provide a theoretical basis for wheat breeding against drought,11 agronomic traits of 91 spring wheat germplasm resources,including wheat varieties cultivars,landraces and introduced varieties,were used to analyze their genetic diversity,the drought index and the clustering study.Results showed that sterile spikelet per spike had the largest coefficients of variance(CV)of 63.5% and 51.5% under the conditions of drought stress and normal irrigation, followed by length from flag leaf pulvinus to spike base with CV of 36.9% and 36.3%,respectively.Correlation analy-sis of drought tolerance index(DTI)showed that DTI of the yield had significant negative correlations with the plant height,peduncle length and length from flag leaf pulvinus to spike base,respectively.Genetic diversity index(H′)of DTI among different traits had a large range from 0.99 to 2.48,with an average value of 1.73.The false spikelet num-ber had the largest H′of 2.48.Based on the phenotypic traits,all accessions could be clustered into five groups.Vari-eties from the fourth group were not sensitive to irrigation and may be suitable for cultivation in dryland.Overall,the ge-netic basis of Ningxia spring wheat is relatively limited.Therefore,breeders should widely collect and use germplasm re-sources and proximal species of wheat,broadening the genetic basis in order to lay the foundation for breeding of break-through cultivars.关键词
春小麦/抗旱性/农艺性状/遗传多样性Key words
spring wheat/drought resistance/ogronomic trait/genetic diversity分类
农业科技引用本文复制引用
张维军,袁汉民,王小亮,亢玲,何进尚,陈东升..宁夏春小麦抗旱性的遗传多样性分析[J].干旱地区农业研究,2017,35(6):95-103,9.基金项目
农业部科技基础性工作专项(2011FY110200) （2011FY110200）
宁夏农业育种专项 （）
宁夏科技支撑计划(国际科技合作)项目(2013ZYH196) （国际科技合作）
宁夏农林科学院科技创新先导资金项目(NKYJ-14-02,NKYG-13 -02) （NKYJ-14-02,NKYG-13 -02）
宁夏自然科学基金项目(NZ13108) （NZ13108）
