实用转绿型叶色标记不育系白丰A的应用研究  

Development of a Greenable Leaf Colour Mutant Baifeng A and Its Application in Hybrid Rice Production

作　　者：沈圣泉[1] 舒庆尧[1] 包劲松[1] 吴殿星[1] 崔海瑞[1] 夏英武[1] 

机构地区：[1]浙江大学原子核农业科学研究所,浙江杭州310029

出　　处：《中国水稻科学》2004年第1期34-38,共5页Chinese Journal of Rice Science

基　　金：国家 8 63计划重大育种专项;国家核技术应用攻关资助项目;浙江省 8812计划资助项目

摘　　要：用γ射线诱变Ⅱ 32B干种子 ,筛选出苗期转绿型叶色突变体 ,并经回交选育 ,获得带转绿型叶色标记不育系白丰A。经考查 ,白丰A苗期第 1～ 3叶表现叶片或叶缘白化 ,白化程度前 2叶相对较高 ,4叶期开始转绿。该叶色突变性状受隐性单基因控制。白丰A主要花器性状和不育特性与Ⅱ 32A相似 ,配合力仍保持Ⅱ 32A的强优特点。不论稀播或密播 ,白丰A苗期生长均略慢于正常绿苗对照 ,但不会造成竞争致死。模拟杂交稻生产和制种繁种 ,表明利用苗期叶色标记结合人工去杂 ,可有效提高田间纯度。A greenable leaf colour mutant, Baifeng A, was screened and developed after a series of backcrosses from Ⅱ32B with gamma ray irradiation. Baifeng A was an albino during the first three leaves growth stage, especially the first two leaves, the leaf colour began to turn back to green at the fourth leaf. Genetic analysis indicated that the leaf colour mutant was controlled by a single recessive gene. Baifeng A had similar flower organs and sterility characters and kept high combination ability as its parent Ⅱ32A. The growth speed of Baifeng A was slower than that of its parent when sown in either high or low density, but the mutant could survive under competition. Simulation test of hybrid rice production demonstrated that the purity of hybrid rice would be improved greatly by using leaf colour as a marker to eliminate the false hybrid rice at early stage.

关 键 词：杂交水稻 不育系 叶色标记 突变体 

分 类 号：S511.21[农业科学—作物学]