摘要
本文提出了测定水稻品种对环境稳定性的一个新参数,采用这一参数对美国加利福尼亚州多年多点的水稻品种整米率进行稳定性分析的结果表明,稳定性与熟期类型在统计上有一定的相关性,即整米率稳定性依晚熟品种、早熟品种、特早熟品种而顺序降低,回归分析说明整米率的稳定性有随整米率的提高而增加的趋向,本文还讨论了稳定性系数的优点和局限性。
A new parameter about stability is proposed.The stabilty coefficient over environments can be estimated as the diffrence between unit Ⅰ and the product of 6 and the coefficient of variation of (?),where (?) is the average performance over n environments.Head rice stability coefficient of (?)2 rice varieties in California arc estimated.The result shows some statistic correlation between head rice stability and rice ripe type.Regression analysis indicates that stability increases with head rice.Advantages and disadvantages of stability coefficient are discussed.
关键词
水稻
整米率
品种
稳定性系数
Lowland rice
Brown rice
Cultivars
Stability
