%0 Journal Article %T 267份青藏高原青稞种质材料的表型多样性分析<br>The Genotypic Diversity Analysis of 267 Six-rowed Hulless Barley Accessions from the Qinghai-Tibetan Plateau %A 夏腾飞 %A 王 %A 蕾 %A 徐金青 %A 王寒冬 %A 张怀刚 %A 刘登才 %A 沈裕虎 %A 昌 %A 西 %J 西北农业学报 %D 2018 %R 10.7606/j.issn.1004-1389.2018.02.005 %X 为了解青藏高原地区青稞种质材料的表型变异和遗传多样性，为育种亲本选配提供参考，对267份青稞种质的10个质量性状和9个数量性状，采用模糊数学的方法进行数量遗传和群体遗传学分析。结果表明：10个质量性状的Shannon-weaver多样性指数变幅为0.03~1.41，平均值为0.54，粒色和穗密度多样性较为丰富；9个数量性状在品种间的遗传差异均达到极显著水平，变异系数为2.84%~42.22%，多样性指数变幅为1.84~2.09，平均值为2.03，表型多样性十分丰富。9个数量性状的相关性分析显示，大多数性状间存在显著或极显著正相关或负相关关系。经主成分分析将相关变量转化为穗粒数因子、粒质量因子、分蘖和穗长因子、株高因子和籽粒体积质量因子等5个特征根，代表全部9个考察性状的89.05% 的表型变异；聚类分析可将供试材料划分为4个类群，第Ⅰ类群多为青稞育成品系，主要为矮秆、高分蘖和密穗型材料。第Ⅱ类群主要是青稞地方品种，主要为中高秆、多分蘖和小穗型材料，其产量较低。第Ⅲ类群主要为高秆、分蘖力适中，中穗大粒型材料，产量适中。第Ⅳ类群主要为中高秆、低分蘖、大穗多粒型品种，产量较高。研究认为青藏高原青稞种质资源具有丰富的遗传多样性，尤其是地方品种可作为宝贵的遗传资源在今后的育种工作中加以利用。<br>In order to explore phenotypic variation and diversity of six-rowed hulless barley from the Qinghai-Tibetan Plateau and provide guidelines for parental selection in the barley breeding program,10 qualitative traits and 9 quantitative traits were selected to conduct quantitative and population genetic analysis with fuzzy mathematic methods in this study.The results showed that Shannon-weaver diversity indexes of 10 qualitative traits ranged from 0.03 to 1.41,with the average genetic diversity index of 0.54,respectively,diversity of kernel color and spike density were abundance; variance of the 9 quantitative traits were significantly difference,the CV ranged from 2.84% to 42.22%,and diversity indexes ranged from 1.84 to 2.09 with average of 2.03.Significantly positive/negative correlations amongthe 9 quantitative traits were revealed by correlation analysis(P<0.05,or 0.01).Principal components analysis was conducted with 9 significantly different quantitative traits,and five principal components were chosen with the cumulative rate of 89.05%.Those five components including spike and kernel number index,kernel mass index,tillering and spike length index,plant height index and kernel volume mass index.Cluster analysis using Ward’s method revealed that 267 six-rowed hulless barley accessions can be divided into four groups when semi-partial R was 0.05.Accessions in Cluster Ⅰ were majorly six-rowed hulless barley lines,charactering with dwarf plant height,highest tiller number and dense spike.Accessions in Cluster Ⅱ　were majorly six-rowed hulless barely landraces,charactering with temperate plant height,higher tiller number and small spike.Accessions in Cluster Ⅲ were majorly cultivars charactering with tall plant height,large grain,temperate tiller number and spike length.Accessions in Cluster Ⅳ were cultivars charactering with moderate plant height,low tiller number,big spike and more grain number per spike.The genetic diversity of six-rowed hulless barley was well revealed through phenotypic traits in %K 青稞 表型性状 多样性指数 主成分分析 聚类分析< %K br> %K Six-rowed hulless barley Phenotype trait Shannon-weaver index Principal component analysis Cluster analysis %U http://xbnyxb.alljournals.cn/ch/reader/view_abstract.aspx?file_no=20180205&flag=1