摘要
从理论与实践分析BT型、滇型粳稻不育系具有高度的遗传稳定性,发生混杂退化的主要原因在于①繁殖过程中保持系的机械混杂;②杂交稻或恢复基因的迁移、扩散;③一般常规品种不育基因迁移及其连锁反应。针对BT型不育系混杂退化原因,提出“人工回交株系循环法”不育系原种繁种程序。
Genetic stability of BT type and Dian type cytoplasmic-genetic male sterility was analysied in the article.The three factors including:①mechanical mixture of maintainer line; ②migration and transference of restoring genes of hybrid rice; ③transference and reaction of the cytoplasmic male sterility gene of traditional cultivar were considered to be the key causes of miture and degeneration of cytoplasmic male sterility .New original seed production program 'artifical backcross plant-line cycle method' was designed to solve the problems in production of cytoplasmic male sterility .
出处
《作物研究》
2004年第4期197-200,共4页
Crop Research
关键词
水稻
杂交粳稻
不育系
混杂退化
Three line hybrid japonica rice
Cytoplasmic male sterility
Admixture and degeneration
