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在玉米-大豆带状间作下,对55份大豆品种的15项农艺及产量性状进行综合分析与评价。结果表明:参试品种表型性状的变异系数为6.35%~55.76%,各性状平均遗传多样性指数达到1.984 3,说明各地的种质资源有着比较丰富的表型多样性;相关性分析表明单株粒重与茎粗、单株荚数、百粒重等9项指标呈现极显著的正相关关系,说明选择品种应着重考虑茎粗、单株荚数、百粒重等9项性状指标;通过主成分分析可以提取出5个主成分来反映这14项性状指标的信息,累计贡献率达67.29%,根据主成分得分并借助权重计算的综合得分把55份大豆品种聚类成3类,其中茎秆粗壮、单株荚数多、百粒重高、生育期适中的第一类大豆品种比较适合在黄淮海地区与玉米进行带状间作种植。
Fifteen agronomic and yield traits of 55 soybean cultivars were comprehensively analyzed and evaluated under the intercropping of corn and soybean. The results showed that the coefficient of variation of phenotypic traits was 6.35% -55.76%, and the average genetic diversity index of each trait reached 1.984 3, which indicated that the germplasm resources in all areas had abundant phenotypic diversity. The correlation analysis showed that the single There were extremely significant positive correlations between the grain weight and the stem diameter, the number of pods per plant and the weight of one hundred seeds, which indicated that the selection of varieties should consider the 9 traits indexes such as stem diameter, pods per plant, and 100 - kernel weight. According to the principal component analysis, five principal components can be extracted to reflect the information of the 14 traits. The cumulative contribution rate reached 67.29%. According to the principal component score and the comprehensive score calculated by weight, 55 soybean varieties were clustered into three categories, The stalks with stalks, pods per plant, high kernel weight and moderate growth period were suitable for planting intercropping with maize in Huang-Huai-Hai region.