Abstract: In order to screen the best common buckwheat varieties suitable for local cultivation, the agronomic traits and yields traits of 12 common buckwheat varieties (lines) were collected in field trials from 2014 to 2016 in Northern Shanxi. Using high stability coefficient method, combining with the coefficient of variation of yield, high yield stability of varieties were evaluated.
Their adaptability were analyzed using principal component analysis. The results showed that the varieties of Qiaoza1, Tongqiao 1 had better yields. The stability of Zongtianqiao 2 and Tongqiao 1 were better. The cumulative contribution rate of three principal components of 12 common buckwheat varieties (lines) was 85947%. According to the comprehensive scores of varieties (lines), Youyutianqiao, Meng 0530 and Ningqiao1 were selected as the best varieties, and these varieties had the best traits in Northern Shanxi area. 12 common buckwheat varieties (lines) were divided into two categories by cluster analysis. Common buckwheat varieties in Type Ⅰhad the higher plant height, larger node number of main stems, larger branches number and heavier grain quality than those in Type Ⅱ.  The present research provided theoretical reference for the breeding of common buckwheat.

Key words: common buckwheat, agronomic traits, high stability coefficient (HSC), principal component analysis

摘要： 为筛选适宜当地种植的优异甜荞麦品种，于2014—2016年通过田间种植、考种对晋北地区引进的12份甜荞麦品种（系）农艺性状和产量进行观测和测量，运用高稳系数法结合产量变异系数对不同甜荞麦品种（系）的稳产丰产性进行评价，主成分分析法对其适应性进行分析。结果表明，荞杂1、通荞1号等品种具有较好的丰产性；综甜荞2号和通荞1号静态稳定性较好。12份甜荞麦品种（系）的前3个主成分的累计贡献率为85947%，根据各品种（系）的综合得分，筛选出3份在晋北地区综合性状表现良好的甜荞麦品种，分别为右玉甜荞、蒙0530和宁荞1号。聚类分析表明，12个甜荞麦品种（系）可划分为两大类，其中第Ⅰ类的株高相对较高，主茎节数和一级分枝数较多，籽粒重、单株粒数多；优于第Ⅱ类。研究为当地甜荞育种提供理论参考。

关键词: 甜荞麦, 农艺性状, 高稳系数法, 主成分分析