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细胞质雄性不育海岛棉的选育和细胞学观察
引用本文:张小全,王学德,朱云国,朱伟,蒋培东.细胞质雄性不育海岛棉的选育和细胞学观察[J].中国农业科学,2007,40(1):34-40.
作者姓名:张小全  王学德  朱云国  朱伟  蒋培东
作者单位:浙江大学农业与生物技术学院农学系
基金项目:国家高技术研究发展计划(863计划);国家重点基础研究发展计划(973计划);浙江省科技攻关项目
摘    要:【目的】利用细胞质雄性不育海岛棉和陆地棉种间的杂种优势。【方法】采用回交育种技术,选育了一套具有哈克尼西棉细胞质的海岛棉不育系“海A”和保持系“海B”,并用石蜡切片的方法对所选育的海岛棉不育系和保持系的小孢子发生进行了细胞学观察。【结果】育成的海岛棉不育系,虽然核背景由陆地棉被置换成了海岛棉,但败育的基本特征没有发生明显改变:“海A”的败育时期主要在小孢子母细胞减数分裂时期,花药无花粉粒,具有败育早、稳定和不受环境影响的特性;“海A”与陆地棉恢复系杂交,杂种F1花粉育性好,结铃率高,铃重增大,衣分提高。【结论】选育的“海A”在海岛棉与陆地棉种间杂种优势利用研究中具有良好的利用前景。

关 键 词:海岛棉  细胞质雄性不育  种间杂种优势
收稿时间:2005-11-11
修稿时间:2005-11-02

Breeding of Cytoplasmic Male Sterile Line in G. Barbadense and Microsporogenesis Cytological Observation
ZHANG Xiao-quan,WANG Xue-de,ZHU Yun-guo,ZHU Wei,JIANG Pei-dong.Breeding of Cytoplasmic Male Sterile Line in G. Barbadense and Microsporogenesis Cytological Observation[J].Scientia Agricultura Sinica,2007,40(1):34-40.
Authors:ZHANG Xiao-quan  WANG Xue-de  ZHU Yun-guo  ZHU Wei  JIANG Pei-dong
Institution:Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029
Abstract:A Gossypium barbadense male-sterility line ‘Hai A’ with G. harknessii cytoplasm and its maintainer ‘Hai B’ were developed by replacing nuclear genome from G. hirsutum to G. barbadense in a backcross breeding program. Its male cell abortion was observed by light microscope through paraffin slice for H.E staining technique. The results showed that the abortion characteristics in ‘Hai A’ were not significantly changed at the cytological level although G. hirsutum nuclear genome of sterile line was replaced by G. barbadense nuclear genome, and its abortion mainly took place at the stage of microspore mother cell meiosis. ‘Hai A’ sterility was very stable because of its early abortion and no-pollens in anthers. Hybrids between ‘Hai A’ and G. hirsutum restorers were high in pollen viability, boll setting rate, boll weight and lint percentage which contributed to high yield heterosis. It is suggested that ‘Hai A’ is of value in the application of cotton interspecific hybrid seed production.
Keywords:Gossypium barbadense  Cytoplasmic male sterility  Intersp  ecific heterosis
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