| In order to understand the genetic diversity of oat resources and screen excellent oat germplasm materials, 21 agronomic traits of 102 oat germplasm were compared and analyzed for genetic variation, and their agronomic traits were comprehensively evaluated based on principal component analysis and cluster analysis. The results showed that spikelet shape showed the highest diversity(1.100) among the quality traits, while the 1 000-grain weight had the highest diversity index(2.053) among the quantitative traits, followed by the number of main spikelet(2.046). The coefficient of variation of infertile spikelet number reached 56.00%, and all phenotypic traits showed abundant variation. Using principal component analysis, 14 germplasm materials with excellent comprehensive traits were selected, including 340, Bayou 14, Jiaocao 1, Caoyou 1, Bayou 3, Baiyan 19, Jinyan 8, Dingyou 9, Bayou 13, Bayou 12, 469, Guyan 2, 118 and 114. The 102 oat germplasm resources were divided into 3 groups by cluster analysis. Group Ⅰ can be used as the parents of dwarf varieties; Group Ⅱ can be used as the parents of high-yield varieties for grains, and group Ⅲ can be used as the parents of high-yield varieties for forage. This study provided theoretical basis for the improvement of oat varieties and the efficient utilization of excellent germplasm. |
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