关键词: 谷子, 种质资源, 生态区, 多样性指数, 聚类分析

Abstract: In order to identify the phenotype of foxtail millet germplasm resources from different ecological regions, 435 varieties were introduced from early-maturing spring-sowing region, middle-maturing spring-sowing region and late-maturing spring-sowing region, and their phenotypic identification and comparative analysis were carried out in Chifeng area. The results showed that there were significant differences in growth period, agronomic characters and yield characters among the three eco-regions (P<0.05). The average growth period of varieties in early-maturing spring-sowing region was (98.35±13.00) d, with many tillers, short plant, thick main stem, short flag leaf, small main panicle, high grain weight and milled millet percentage, medium yield, and low genetic diversity of phenotypic traits. The average growth period of varieties in-middle-maturing spring-sowing region was (113.07±8.63) d, with few tillers, high plant height, long peduncle, thin main stem, short flag leaf, large main panicle, high grain weight and milled millet percentage, low yield, and high genetic diversity of yield traits. The average growth period of varieties in late-maturing spring-sowing region was (125.80±6.76) d,with short peduncle, thick main stem, long flag leaf, big main panicle, light weight of grain, low milled millet percentage, high yield, and the high genetic diversity of agronomic traits. By cluster analysis of 16 phenotypes after standardized, the varieties could be divided into 4 groups,varieties of groupⅠhadmedium maturity, large biomass, high milled millet percentage and yield, varieties of groupⅡhadlate maturity, small biomass, low milled millet percentage and yield, varieties of groupⅢhad early maturity, small biomass and high yield, groupⅣvarieties had medium late maturity, large biomass and high yield.

Key words: foxtail millet, germplasmresources, ecological region, diversity index, cluster analysis