用GGE双标图分析苦荞品种的产量稳定性及试验地点相似性

GGE biplot based yield stability and test site similarity of tartary buckwheat varieties

【目的】更准确有效地分析苦荞品种适应性,筛选优良苦荞品种和评价试验地点,为苦荞品种推广应用和区域试验试点的科学布局提供参考。【方法】采用变异分析和GGE双标图对国家区域试验中第8轮苦麦区域试验的生育期、株高、主茎分枝数、主茎节数、千粒质量及产量进行分析。【结果】(1)参试品种(系)在生育期、株高、主茎分枝数、主茎节数4个性状上的平均值表现为北方高于南方,而千粒质量和产量的平均值表现为南方高于北方。参试品种(系)间各个性状的变异小,稳定性较好,但类型不丰富。(2)南、北方各有其适宜的高产稳定品种。云荞67、昭苦2号、西苦7-3为适宜于南方的高产稳产品种;西农9940、凉苦-4和威苦02-286为适宜于北方的高产稳产品种。【结论】利用GGE双标图可以对试验地点分组,但对于试验点的评价和取舍要结合地理环境条件进行客观分析。

[Objective] This study aimed to analyze the adaptability of tartary buckwheat, selection of elite varieties, and evaluation of test sites, and to provide information for application of buckwheat varieties and distribution of test sites. [Method] Variance analysis and GGE biplot were conducted to analyze growing period, plant height, stem branch, nodes per plant, thousand grain weight and yield from the 8th national variety regional test. [Result] （1） Growing period, plant height, stem branch and nodes per plant in northern region were higher than in southern region, while thousand grain weight and yield in southern region were higher than in northern region. The traits were steady and trait variations were low while variety types were not rich. （2） Varieties that adapted to northern and southern regions were identified. Yunqiao 67,Zhaoku 2 and Xiku 7-3 were good for southern region while Xinong 9940,Liangku 4 and Weiku 02-286 were good for northern region. [ConclusionI GGE biplot could be used to group test sites. But, selection and evaluation of test sites needs combination of geographical environment conditions.