关键词: 金苦荞, 品质性状, 农艺性状, 变异分析, 相关性分析, 聚类分析

Abstract: Fagopyrum tatari-cymosum is a semi-perennial new buckwheat type developped from the hybridization between F. tataricum and F. cymosum. To explore the genetic laws of agronomic and quality traits of F. tatari-cymosum, 26 lines of F. tatari-cymosum were selected as materials, and their quality traits and agronomic traits were analyzed by variance analysis, correlation analysis and cluster analysis. The results were as follows:(1)The variation coefficient for quality traits of F. tatari-cymosum was gliadin content > glutenin content > flavonoids content > total protein content > globulin content > albumin content>starch content.(2)The variation coefficient for agronomic traits of F. tatari-cymosum was branch number of main stems > node number within 20 cm of the bases > main stem diameter > grain area > 1 000-grain weight > node number of main stems > plant height > grain length to width ratio > grain width > grain length > shell rate > grain perimeter > grain diameter.(3)In the correlation analysis, the flavonoid content was significantly positively correlated with albumin content; the gliadin content was significantly or extremely significantly positively correlated with the main stems diameter, the node number of main stems, the node number within 20 cm of the bases, and significantly or extremely significantly negatively correlated with the 1 000-grain weight, grain area, grain perimeter, grain width, and grain diameter; the starch content was positively correlated with grain area, grain length and grain diameter.(4)By cluster analysis, 26 F. tatari-cymosum lines were divided into three groups. Group I belonged to high starch, short stem, multi branched, low shell rate, large long grain lines, which could be used as parent material for breeding purposes of high starch and low shell rate; Group Ⅱ belonged to high protein, high stem, thick, small grain type lines, which could be used as a material for breeding purposes of high protein and strong stress resistance; Group Ⅲ belonged to high quality, high yield, large grain type lines. The results provide theoretical references for the breeding of F. tatari-cymosum.

Key words: Fagopyrum tatari-cymosum, quality traits, agronomic traits, variation analysis, correlation analysis, cluster analysis