论文部分内容阅读
调查了太湖稻区 １６３ 份粳稻地方品种和 １６ 份 ６０～９０ 年代的高产粳稻品种的１３ 个主要农艺性状的变异， 对其中有显著差异的 １０ 个性状进行了主成分分析； 由主成分分析中提取的５ 个公因子进行聚类分析， 将 １７９ 份材料划分为５ 组 １３类；依据各类的平均值计算理论产量及其主要农艺性状间的偏相关关系。结果表明：各产量构成要素对产量的贡献依次为：单穗重、每株有效穗数、每穗实粒数、千粒重、结实率、总粒数， 说明超高产品种必须有较高的穗重和适宜的穗数基础。
Thirteen major agronomic traits were investigated in 163 japonica rice landraces and 16 high-yielding Japonica rice cultivars from 60 to 90 in the Taihu Lake region. Principal component analysis (PCA) was performed on 10 traits which were significantly different. By principal component analysis Five common factors were extracted for cluster analysis, and 179 materials were divided into 5 groups and 13 categories. According to the average of each class, the partial correlation between theoretical yield and its main agronomic traits was calculated. The results showed that the contribution of yield components to yield were as follows: single panicle weight, panicle per panicle, number of panicle per panicle, grain weight per panicle, seed setting rate, total grain number, which indicated that the ear weight And the appropriate number of spikes.