带叶色标记杂交水稻三系不育系的选育

Selection of leaf color marked CMS lines in hybrid rice

用３００ Ｇｙ ６０Ｃｏγ射线直接辐照杂交水稻保持系龙特甫Ｂ干种子，获得了若干叶色突变体，同时选择部分叶色突变体作轮回亲本与不育系龙特甫Ａ 杂交并回交，获得ＢＣ１ 群体。对Ｍ４ 叶色突变体和ＢＣ１ 群体作了初步分析鉴定。遗传研究揭示，叶色标记突变均受一对隐性基因控制。经农艺性状分析， 株高与对照龙特甫Ａ 相仿， 初步筛选４ 个较为理想的带叶色标记不育系。

Some leaf color mutants were obtained through radiation of dry seeds of maintainer line of hybrid rice Longtefu B with 60 Co γ rays at a dosage of 300 Gy,from a part of which cross and backcross were made with CMS line Longtefu A and selected as rotational parent,resulting in producing BC 1 population.Analysis and identification were made on M 4 and BC 1 population.Results of genetic analysis showed that mutant marked with leaf color were all controlled by a pair of recessive gene.Analysis of agronomic characters indicated that CMS lines were roughly similar to Longtefu A the check in plant height.Four promising CMS lines with leaf color were selected.