Correlation Between Seed Oilbearing Rate and Main Agronomic Characters and Their Selection
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摘要: 以5个油菜品种为试验材料,应用方差分析估算了籽粒含油率与主要经济性状间的遗传相关、遗传进度和选择指数等遗传参数。结果表明,一次分枝数、单株有效角果数、每角粒数、单株粒重与含油率为正向关系,千粒重与含油率为负向关系,而且这些性状对含油率有较大的相关遗传进度。在对含油率选择的3种方案中,指数选择优于相关选择和直接选择。采用一次有效分枝数、单株有效角果数、千粒重和单株粒重4个相关性状构成的选择指数对含油率进行综合选择的效果最佳。Abstract: The results of varicance analysis on genetic parameters (genetic correlation,genetic gain and selection index) in rape showed that correlation between some main characters such as numbers of the first order effective branches,effective pods per plant,seed numbers per pod and seed weight per plant and seed oil bearing were positive,while correlation between 1000 seed weight and seed oil bearing was negative.Furthermore all these characters had a great correlated genetic gain (CGS) to seed oil bearing rate;Index selection had an advantage over direct selection and correlative selection;The selection index which consisted of the first order effective branches numbers,the effective pods numbers per plant,1000-seed weight and seed weight per plant had the best effect on selecting oil bearing rate.
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Key words:
- Rape /
- Genetic correlation /
- Genetic gain /
- Selection index
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