基于HA-GGE双标图的长江流域棉花区域试验环境评价

采用遗传力校正的GGE (HA-GGE)双标图方法对2000-2010年间27个独立的长江流域棉花品种区域试验的15个试验环境(试验点)在皮棉产量选择上的鉴别力、代表性、理想指数和离优度指数进行分析和综合评价。结果表明，湖北黄冈、江苏南京和湖北荆州是最理想的试验环境，对以长江流域为目标环境的广适性新品种选育和作为区域试验点鉴别理想品种的效率最高，而四川射洪、四川简阳、湖北襄阳和河南南阳不适宜作为针对长江流域的新品种选择与推荐环境。理想试验环境都位于长江流域除南襄盆地以外的中下游棉区，而不理想试验环境中的四川射洪和四川简阳位于长江流域棉区最西边的品种熟期较早且种植密度较高的四川盆地棉区，河南南阳和湖北襄阳位于长江流域棉区最北边, 与黄河流域棉区接壤, 霜期较早且晚秋降温快的南襄盆地棉区。本研究充分展示了HA-GGE双标图在区域试验环境评价方面的应用效果，也为长江流域棉花品种生态区划分和国家棉花区试方案的决策提供了理论依据。

Evaluation of Cotton Regional Trial Environments Based on HA-GGE Biplot in the Yangtze River Valley

The latest heritability adjusted GGE (HA-GGE) biplot analysis was adopted toevaluate cotton regional trial environments (trial locations) in terms of the discriminating ability, representative ability, desirability index and superiority index for cotton lint yield selection in27 independent sets of cotton variety trials in the Yangtze River Valley during 2000–2010 periods. The results showed that Huanggang, Nanjing and Jinzou werethe most ideal trial environments and thereforewere the most effective locations for developing and/or remanding cultivars for broad adaptation selection in the target region. However, Shehong, Jianyang, Xiangyang and Nanyang were not desirable for cotton lint yield selection in the whole regions. The desirable test environments were alllocated in the middle and lower reaches of the Yangtze River Valley, while among the undesirable test environments Nanyang and Xiangyang were located at the inland Nan-Xiang basin bordering with the Yellow River Valley in the north, where the first frost came early and temperature declined sharply in the late autumn, and Shehong and Jianyang were located at the mountainous Sichuan basin in the west area, where cotton planting density was higher and cotton matured earlier. Therefore, this article fully displayed the HA-GGE biplot application efficiency in regional trial environment evaluation and also provided the theory background for the decision-making in national cotton scheme implementation and cotton megaenvironment investigation in the Yangtze River Valley.