Abstract:

Common deficiencies existed in previous studies on early generation stability of rice due to similar methods used in these studies in the past decade.A single type of materials was used in these studies,leading to declined total variation among hybrid progenies.Researchers neglected the influence of sampling error,and small samples from F2 populations further reduced the variation.These deficiencies may result in wrong conclusions.Therefore,it was suggested that more qualitative traits should be investigated to obtain more credible conclusions.The relationship between phenotypic uniformity and genetic stability,and the influence of early generation stability on rice breeding program were discussed.

Key words: rice, early generation stability, suggestion, deficiency

摘要： 十年来有关水稻早世代稳定特性的研究虽有不少报道，但研究方法雷同，因而存在不少具有共性的问题。在该项研究中，多个研究者采用的材料类型单一，降低了杂交后代分离的总变异量；研究者对抽样误差的影响估计不足，所谓F2株系的小样本抽样，又进一步缩小了株系内变异程度，这就有可能出现假阳性的结果。建议在水稻早世代稳定特性的研究中，增加多个质量性状的研究内容，从而使研究结果更加接近真实。还对表型整齐度与遗传稳定性之间的关系，以及早世代稳定对育种工作的影响等提出了与研究者不同的观点。

关键词: 水稻, 早世代稳定特性, 建议, 问题