【摘要】 【目的】挖掘西藏大麦种质资源的优良基因，为育种提供优质材料。【方法】以西藏不同地区的140份种质资源为材料，利用Excel和SPSS 21.0软件对13个农艺性状进行遗传多样性、聚类分析和主成分分析。【结果】西藏大麦资源存在着丰富的遗传多样性，8个农艺性状中单株穗数的变异系数43.7%。系统聚类分析方法将140份材料在遗传距离6水平上聚为5个类群，第Ⅰ类群包含35份材料，第Ⅱ类群包含29份材料，第Ⅲ类群包含33份材料，第Ⅳ类群包含15份材料，第Ⅴ类群包含28份材料。主成分分析结果表明，将8个农艺性状简化为3个主成分，其累计贡献率为72.587%,以单株穗数的贡献率最高，为0.829。【结论】本研究为西藏种质资源保护和利用提供了科学依据。更多还原

【Abstract】 【Objective】The present paper aimed to explore the excellent genes of germplasm resources of Tiebt barley and provide high-quality materials for breeding.【Method】The genetic diversity, clustering and principal component analysis of 13 agronomic traits were carried out by using Excel and SPSS 21.0 software with 140 germplasm resources from different areas of Tibet.【Result】There was rich genetic diversity in barley resources in Tibet, and the coefficient of variation of panicle number per plant among 8 agronomic traits was 43.7%.Cluster analysis divided the 140 materials into five groups at the genetic distances of 6 level, of which 35 materials were in groupⅠ,29 materials were in groupⅡ,33 materials were in groupⅢ,15 materials were in group Ⅳ and 28 materials were in group Ⅴ.The results of principal component analysis showed that when the 8 agronomic traits were simplified into 3 principal components, the cumulative contribution rate was 72.587%,and the contribution rate of panicle per plant was the highest, which was 0.829.【Conclusion】The study provides a scientific basis for the protection and utilization of germplasm resources in Tibet.更多还原