华北农学报 ›› 2020, Vol. 35 ›› Issue (1): 65-72. doi: 10.7668/hbnxb.20190244

所属专题: 玉米

• 作物遗传育种·种质资源·生物技术 • 上一篇    下一篇

玉米矮秆突变体K125d的遗传鉴定

石海春1,2, 陈立1,3, 李开兵1,4, 余学杰1,2, 袁继超1, 曲比伍合2, 柯永培1,2   

  1. 1. 四川农业大学 农学院, 四川 温江 611130;
    2. 四川农大正红生物技术有限责任公司, 四川 双流 610213;
    3. 雅安市科学技术和知识产权局, 四川 雅安 625000;
    4. 毕节市农业农村局, 贵州 毕节 551700
  • 收稿日期:2019-08-09 出版日期:2020-02-28
  • 通讯作者: 柯永培(1963-),男,四川内江人,教授,博士,博士生导师,主要从事玉米遗传育种研究。
  • 作者简介:石海春(1974-),男,四川宣汉人,教授,博士,博士生导师,主要从事玉米遗传育种和种子学教学与科研工作。
  • 基金资助:
    四川省重点研发项目(2019YFN0012);科技支撑计划项目(2016NYZ0006;2011FZ0119);战略性新兴产业发展专项资金(SC2013510122023)

Genetic Analysis of Maize Dwarf Mutant K125d

SHI Haichun1,2, CHEN Li1,3, LI Kaibing1,4, YU Xuejie1,2, YUAN Jichao1, QUBI Wuhe2, KE Yongpei1,2   

  1. 1. College of Agronomy, Sichuan Agricultural University, Wenjiang 611130, China;
    2. Sichuan Nongda Zhenghong Bio Co. Ltd., Shuangliu 610213, China;
    3. Sichuan Ya'an Science and Technology and Intellectual Property Office, Ya'an 625000, China;
    4. Bureau of Agriculture and Rural Affairs of Bijie City, Bijie 551700, China
  • Received:2019-08-09 Published:2020-02-28

摘要: 积极发掘新的玉米矮秆资源并进行研究和利用,有利于玉米矮化育种。对比研究了矮秆突变体K125d和同源自交系K211之间的形态差异,通过与7个不同株高自交系配制正反交F1,回交B1、B2和自交F2群体,分析突变体K125d矮秆性状的遗传模式,其矮秆基因定位用BSA-SSR标记法。结果表明,与K211相比,K125d的生育期极显著增长,株高极显著降低;叶片重叠密集,叶数和叶宽极显著增加,叶片夹角极显著降低。所有群体在2个不同生态点试验结果一致,正反交F1均为高秆;7个B1群体和F2群体株高分离比例分别符合1 ∶ 1和3 ∶ 1;除K123d外,6个B2群体均为高秆,表明突变体K125d的株高由1对隐性细胞核基因控制,暂命名为d125。以(K125d×K236) F2为定位群体,将基因d125定位于1号染色体SSR标记umc2569和umc1278之间,其距离为6.6,5.1 cM。以br2基因模型GRMZM2G315375克隆d125发现, d125在模型第1 651个碱基处有一个9 bp片段插入,在第6 438碱基处有一个232 bp片段缺失,缺失导致移码突变,造成功能位点缺失可能是导致转运功能丧失的主要原因。

关键词: 玉米, 矮秆突变体, K125d, 遗传分析, 基因定位, 基因克隆

Abstract: It is of great significance to explore, study and utilize the new dwarf maize resources in maize dwarf breeding. The study compared and analyzed the morphological differences between dwarf mutant K125d and homologous K211 inbred lines. The reciprocal F1, B1, B2 and F2 populations between K125d and seven inbred lines with different heights were used to analyze the genetic model of dwarf characters in mutant K125d and to locate the dwarf gene by BSA-SSR labeling method. Compared with K211, K125d displayed significantly longer growth period, shorter plant height, dense leaf overlapping, increased leaf number and leaf breadth, and decreased leaf angle. The experiment results were consistent in all populations from two different ecological sites. The height of reciprocal F1 was taller. The separation proportions of B1 and F2 populations were 1:1 and 3:1, respectively. The heights of B2 populations were tall in six populations except K123d. The plant height of dwarf mutant K125d was controlled by a recessive nuclear gene, which was tentatively named d125. The F2 population from k125d×K236 was used as the locating population. The dwarf gene d125 was initially located on the long arm of chromosome 1, between SSR markers umc2569 and umc1278 with the genetic distances of 6.6,5.1 cM, respectively. It was concluded that d125 was cloned from gene ID GRMZM2G315375, which had an insertion of 9 bp fragment at +1 651 locus and a deletion of 232 bp fragment at +6 438 locus compared to K211. The deletion led to frameshift mutation, and the loss of functional sites might be the main reason for the loss of transport function.

Key words: Maize, Dwarf mutant, K125d, Genetic analysis, Gene location, Gene cloning

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引用本文

石海春, 陈立, 李开兵, 余学杰, 袁继超, 曲比伍合, 柯永培. 玉米矮秆突变体K125d的遗传鉴定[J]. 华北农学报, 2020, 35(1): 65-72. doi: 10.7668/hbnxb.20190244.

SHI Haichun, CHEN Li, LI Kaibing, YU Xuejie, YUAN Jichao, QUBI Wuhe, KE Yongpei. Genetic Analysis of Maize Dwarf Mutant K125d[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(1): 65-72. doi: 10.7668/hbnxb.20190244.

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