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园艺学报 ›› 2012, Vol. 39 ›› Issue (3): 469-476.

• 蔬菜 • 上一篇    下一篇

大白菜hau胞质雄性不育系的鉴定及不育相关基因结构分析

施  展,万正杰*,徐跃进,李雪红,邹瑞昌   

  1. 华中农业大学园艺林学学院,华中农业大学园艺植物生物学教育部重点实验室,武汉 430070
  • 收稿日期:2011-12-19 修回日期:2012-02-21 出版日期:2012-03-25 发布日期:2012-03-25
  • 通讯作者: 万正杰 E-mail:wanzj@mail.hzau.edu.cn

Characterization of the Chinese Cabbage hau Cytoplasmic Male-sterile Line and Sequence Analysis of the Fertility-related Gene

SHI Zhan,WAN Zheng-jie*,XU Yue-jin,LI Xue-hong,and ZOU Rui-chang   

  1. College of Horticulture and Forestry,Huazhong Agricultural University,Education Ministry Key Laboratory of Horticultural Plant Biology,Huazhong Agricultural University,Wuhan 430070,China
  • Received:2011-12-19 Revised:2012-02-21 Online:2012-03-25 Published:2012-03-25
  • Contact: WAN Zheng-jie E-mail:wanzj@mail.hzau.edu.cn

摘要: 采用染色体压片法和形态观察法,对大白菜hau胞质雄性不育材料6w-9605A的2个遗传世代(F1和BC6)的染色体数和花器官进行鉴定。结果表明:F1染色体数为28条;BC6染色体数为20条,与白菜的染色体数相同。6w-9605A的花药呈三角形,干瘪无花粉,败育彻底。利用芸薹属作物雄性不育基因线粒体保守序列设计3对引物,在6w-9605A中扩增出867 bp的片段。基因预测显示,在线粒体基因atp6的下游产生1个新的开放阅读框为orf288,与目前报道的芸薹属作物细胞质雄性不育相关基因orf224orf138等均不相同,这种新的基因结构特点极有可能就是大白菜hau胞质不育系6w-9605A产生不育的原因。

关键词: 大白菜, 雄性不育, hau胞质, 不育基因

Abstract: The male-sterility of the Chinese cabbage(Brassica campestris L. ssp. pekinensis)line 6w-9605A,a cytoplasmic male-sterile line,was studied in this research. Chromosome squashing revealed that the chromosome numbers in the F1 and BC6 of 6w-9605A were 28 and 20,respectively,and morphologic observation in the BC6 of 6w-9605A showed that the anthers of this line were degenerated and completely abortive. Further,primers were designed based on the conserved sequence of known cytoplasmic male sterility genes in the Brassica species,and a new open reading frame(ORF)of 867 base pairs was amplified from 6w-9605A. Sequence analysis showed that this ORF located downstream from the mitochondrial gene apt6 and was predicted as orf288. Sequence alignment demonstrated that the ORF is different from the sterile genes of pol CMS and ogu CMS,and it may cause the sterility of 6w-9605A.

Key words: Chinese cabbage, male-sterility, hau cytoplasm male-sterile line, infertility genes