关键词: 豌豆, 种质资源, 农艺性状, 遗传多样性

Abstract: Shortage of legume with high productivity and quality was considered as one of the vital limited factors in husbandry of alpine regions. Breeding legume species with high productivity and good palatability was critical factor to determine the achievement in establishment of artificial grassland. However,little studies have paid an attention to the breeding of strong adaptability and genetic diversity of Pisum sativum germplasm in alpine regions. Therefore,150 P. sativum germplasms originated from domestic and exotic were evaluated on their agronomic traits and genetic diversities through the principal component (PCA) and cluster analysis. Our results revealed that the coefficient of genetic variation of quantitative traits among the 150 examined P. sativum germplasms were relatively large,the average variation coefficient and genetic diversity index of 6 qualitative traits are 32.22% and 0.96,respectively. Similarly,the average variation coefficients and genetic diversity indexes of 17 quantitative traits were 41.39% and 1.79. Agronomic traits of 150 tested germplasms could be classify into 6 principal components,and the cumulative contribution of those components reached to 72.25% according to the PCA. Furthermore,150 tested P. sativum germplasms could be divided into three group as forage yield group,grain quantity group and seed size group based on the methodical cluster analysis. Our results would provide a theoretical foundation and basic support for selecting and breeding of strong adaptive P. sativum germplasm for establishing high quality artificial grassland in alpine regions.

Key words: Pisum sativum, Germplasm resource, Agronomic traits, Genetic diversity