关键词: 甜荞（Fagopyrum esculentum Moench.）, 种质资源, 评价, 筛选, 内蒙古呼包地区

Abstract: 77 germplasm resources of sweet buckwheat（Fagopyrum esculentum Moench.） were introduced for field identification of agronomic characters, in order to screen excellent germplasm resources suitable for planting in the Hohhot-Baotou area of Inner Mongolia. The results showed that the yield and grain weight per plant had the highest genetic variability, with variation coefficients of 37.1% and 38.5%, respectively. The variation coefficients of the first branch number, grain number per plant, first lateral branch length, stem wall thickness and plant height were relatively high, with variation coefficients of 36.6%, 33.9%, 32.4%, 29.4% and 21.9% respectively. It indicated that these traits had abundant genetic variability. Cluster analysis of 12 agronomic traits showed that 77 sweet buckwheat germplasm resources could be divided into 3 categories, including 21 short-stalk varieties, 34 large-grain and high-yield varieties and 22 high-stalk and lodging-resistant varieties. The traits significantly related to the yield of buckwheat were grain weight per plant, 1 000-grain weight and grain number per plant（P<0.01）. Nine excellent germplasm resources of sweet buckwheat with dwarf, high yield and lodging resistance were screened out, which were suitable for the climatic conditions in the Hohhot-Baotou area of Inner Mongolia.

Key words: sweet buckwheat（Fagopyrum esculentum Moench.）, germplasm resources, evaluation, screen, Hohhot-Baotou of Inner Mongolia Autonomous Region