用GGE双标图分析燕麦区域试验品系产量稳定性及试点代表性

为准确评价燕麦品系的稳产性和适应性,采用GGE双标图对2006—2008年国家燕麦区域试验10个试点的12个裸燕麦品系及6个参试地点的6个皮燕麦品系试验数据进行分析。结果显示,坝莜8号、坝莜3号和张燕2号属于高产、稳产性较好的品系;科燕1号和保罗具有特殊适应性,在局部地区有推广价值。在10个裸燕麦试点中,河北张北最具有代表性,吉林白城、新疆乌鲁木齐、河北崇礼、宁夏固原和内蒙古武川的鉴别力较好,而甘肃会宁和山西右玉的鉴别力较差。在6个皮燕麦试点中,内蒙古武川最具有代表性,青海西宁的鉴别力最好,河北张北的鉴别力较差。本研究为客观评价燕麦参试品系的高产性及稳产性提供了简便、有效的分析手段,也为国家燕麦品种鉴定与推广提供了依据。

Yield Stability and Testing-Site Representativeness in National Regional Trials for Oat Lines Based on GGE-Biplot Analysis

Atpresent, arithmetic mean method is commonly used to evaluate the yield stability and adaptability of oat (Avena sativa) varieties, and analysis of variance is used to estimate the error in national regional trials. However, it is difficult to evaluate the varieties accurately, because of the discrepancies across tests and years. In this study, GGE-biplot method was used to analyze the date from the national regional trials for oat from 2006 to 2008. Twelve lines of naked oat were tested in ten sites, and six lines of oat were tested in six sites. The results showed that Bayou 8, Bayou 3, and Zhangyan 2 had higher yield and better yield stability than other lines. Keyan-1 and Baoluo possessed special adaptabilities. For naked oat, Zhangbei of Hebei province, was the best representative testing site; Baicheng of Jilin, Wuchuan of Inner Mongolia, Urumchi of Xinjiang, Chongli of Hebei, and Guyuan of Gansu had better discrimination than other sites, where as, Huining of Gansu and Youyu of Shanxi were the worst. For the oat test, Wuchuan of Inner Mongolia had the best representative; Xining of Qinghai had the best discrimination, but Zhangbei of Hebei was the worst. This article provides a simple and effective method for analyzing data, and evaluating the yield stability and adaptability of oat varieties involved in national regional trials oat and favorite test sites.