湖北农业科学 ›› 2020, Vol. 59 ›› Issue (10): 19-22.doi: 10.14088/j.cnki.issn0439-8114.2020.10.004

• 育种·栽培 • 上一篇    下一篇

甘蓝型油菜隐性核三系保持系新材料遗传机理初探

刘念1, 蒙大庆1, 祝捷2, 徐凯2, 汤天泽1, 涂金星2   

  1. 1.绵阳市农业科学研究院,四川 绵阳 621023;
    2.华中农业大学植物科学技术学院,武汉 430070
  • 收稿日期:2019-07-05 出版日期:2020-05-25 发布日期:2020-08-03
  • 通讯作者: 涂金星,教授,主要从事甘蓝型油菜雄性不育和杂种优势机理的基础研究,(电子信箱)tujx@mail.hzau.edu.cn。
  • 作者简介:刘 念(1985-),女,重庆合川人,高级农艺师,硕士,主要从事油菜遗传育种、品质分析研究,(电话)0816-2822092(电子信箱)liunian20030243@163.com。
  • 基金资助:
    国家油菜产业体系建设项目(CARS-12);“十三五”四川省农作物育种攻关项目(2016NYZ0031);四川省创新团队项目(2019-2022)

The preliminary study of the genetic mechanism of recessive nuclear three-lines maintainer in Brasscia Napus L.

LIU Nian1, MENG Da-qing1, ZHU Jie2, XU Kai2, TANG Tian-ze1, TU Jin-xing2   

  1. 1. Mianyang Academy of Agricultural Sciences,Mianyang 621023,Sichuan,China;
    2. College of Plant Science & Technology of Huazhong Agricultural University,Wuhan 430070,China;
  • Received:2019-07-05 Online:2020-05-25 Published:2020-08-03

摘要: 绵阳市农业科学研究院于1993年发现了油菜(Brassica napus L.)核三系保持系新材料绵7MB,在其自交以及兄妹交后代分离群体中,育性分离比例均不符合孟德尔遗传规律,呈现出偏分离现象。通过对绵7MB田间遗传分析和细胞学分析,对其遗传机理进行了初步的探索。结果表明,偏分离现象可能是由于绵7MB在雄配子传递过程中引起的。绵7MB偏分离现象的产生不是由于减数分裂异常,可能由于部分基因型的合子死亡,导致后代比例出现异常。

关键词: 甘蓝型油菜(Brassica napus L.), 偏分离, 雄性不育, 绵7MB

Abstract: The new nuclear three-lines maintainer Mian 7MB was revealed by Mianyang Academy of Agricultural Sciences in 1993. In the segregating population of selfing and sibling offspring, the proportion of fertility segregation did not conform to Mendelian genetic law, showing a partial segregation phenomenon. Through the field genetic analysis and cytological analysis, the genetic mechanism of Mian 7MB was preliminarily explored. The results showed that the segregation distortion in Mian 7MB only happened in the male gamete transference. Mian 7MB segregation was not due to abnormal meiosis, but may be due to the death of zygotes of some genotypes, resulting in abnormal proportion of offspring.

Key words: Brassica napus L., segregation distortion, male sterility, Mian 7MB

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