燕麦种质资源重要农艺性状适应性和稳定性评价

为客观评价燕麦种质资源重要农艺性状的适应性和稳定性,本研究利用加权隶属函数法分析了81份燕麦种质材料在7个试验点的株高等7个重要农艺性状的遗传差异,以加权隶属函数值(D值)构建基因型×环境的GGE双标图,分析裸燕麦、皮燕麦在不同试验点的适应性和稳定性。结果表明:主穗粒重是裸燕麦材料在所有试验点中变异程度最大的性状,有效分蘖数是皮燕麦中变异程度最大的性状,其余5个性状的变异程度与皮裸性几乎无关;加权隶属函数法结合GGE双标图在对燕麦农艺性状进行综合分析时具有很好的应用价值;坝莜三号、73014-336、二莜麦、Bauntebue、坝燕一号等材料可用于实际生产,其中的坝莜三号、坝燕一号已是当下河北等地区的主栽品种;晋8609-1、LY03-02、二秋莜麦、64燕麦、品16、Banner、LY01-12等可作为杂交育种的亲本材料。

Evaluation of Adaptability and Stability for Important Agronomic Traits of Oat Germplasm Resources

For comprehensive and objective evaluation the adaptability and stability for important agronomic traits of oat germplasm resources, 81 accessions of oat including naked oat and hulled oat were involved in this study, and genetic differences of seven important agronomic traits such as plant height in seven test sites were investigated and analyzed. On the basis of D value, a weighted subordinate function value, series of GGE biplot of genotype × environment were built with GGE biplot V6.3, and the adaptation and stability of 81 tested oat accessions in different test sites were analyzed according to distribution and relationship of oat accessions and test sites on above biplots. Results showed that grain weight of main ear was the trait with the largest variable coefficient among tested accessions of naked oat in all tested sites, and the number of effective tillers was the largest variable trait among tested accessions of hulled oat, and the rest five traits with no difference between naked oat and hulled oat. It was demonstrated that the method of weighted subordinate function in combination with GGE biplot would have good prospect in comprehensive analysis of oat agronomic traits. These accessions including Bayou No.3, 73014-336, Er Youmai, Bauntebue and Bayan No.1 would be cultivated well in the seven test sites at least, in which Bayou No.3 and Bayan No.1 have been selected as main oat variety in regions including Hebei Province. Such accessions as Jin 8609-1, LY03-02, Erqiu Youmai, 64 Yanmai, Pin 16, Banner and LY01-12 may be fit for breeding.