关键词: 野牛草, 种质资源, 种子, 生物学特性, 萌发特性

Abstract: In order to investigate the variation and genetic diversity of the germplasm of Buchloe dactyloides and screen the excellent germplasm resources,50 germplasm resources of buffalograss seeds were selected in this study,and their morphological characteristics,qualitive characteristics and germination characteristics were examined. The results showed that there were significant differences in biological characters of buffalograss seeds among different germplasm resources (P<0.05),those germplasm resources had a rich genetic variation and improvement potential. There were some correlations among the biological characters of seeds. At the same time,50 germplasms were divided into 3 groups based on different character indexes,among which 7 germplasm materials with good character performance could be screened out. The seeds of various resources of buffalograss had a high viability at the harvest year，but their average seedling emergence rate was less than 10% under natural conditions,indicating there was obvious dormancy phenomenon. The removal of glume structure is a prerequisite for breaking the dormancy of buffalograss seeds;but to greatly promote seed germination,the caryopsis after removal of glume still needs an initiator treatment,in which the removal of glume combined with that caryopsis being soaked into GA₃ solution for the best effect. Further,soaked into the GA₃ solution of the concentration of 2 000 mg·L^-1,the dormancy of buffalograss seeds can basically be completely lifted.

Key words: Buchloe dactyloides, Germplasm resource, Seed, Biological character, Germination characteristics