早籼杂交稻新组合选育的综合分析方法

Synthetic Analysis Method Used in Early Indica Hybrid Rice Breeding

对23个早籼杂交稻新组合的14个籽粒性状进行因子分析.选取了5个公因子,其方差累计贡献率为85 99%;通过5个公因子作为综合指标的聚类分析,其结果可分为6类;并以23个组合的5个公因子选择指数,求得每个杂交组合的综合选择指数,结果表明,根据综合选择指数的大小,不但可作为决选杂交组合的依据,而且可衡量决选的杂交组合达到理想组合的程度.

Factor analysis was performed for 14 grain characters of 23 early indica hybrids rice. The results indicated that the contribution of the first five factors to total variation of population studied accounted for over 8599%. Using the first five factors for index, the 23 early indian hybrid rice combinations were grouped into 6 clusters by hierachical clustering method. According to the factor score of promax rotation, comprehensive selection index can be acquired from each hybrid rice combination. The results indicated that the comprehensive selection index, not only can serve as the foundation for deciding the hybrid combination, but also can measure the ideal combined degree that the deciding hybrid combination could be reached.