河南农业科学 ›› 2021, Vol. 50 ›› Issue (4): 8-16.DOI: 10.15933/j.cnki.1004-3268.2021.04.002

• 作物栽培·遗传育种 • 上一篇    下一篇

利用EMS诱变创制抗除草剂粳稻新种质

王付华1,李自超2,王亚1,付景1,杨文博1,尹海庆1,王生轩1,王越涛1,白涛1,张珍3   

  1. (1.河南省农业科学院 粮食作物研究所,河南 郑州 450002; 2.中国农业大学 农学院,北京 100193;3.河南省农业科学技术展览馆,河南 郑州 450000)
  • 收稿日期:2021-01-18 出版日期:2021-04-15 发布日期:2021-04-15
  • 通讯作者: 尹海庆(1965-),男,河南南阳人,研究员,主要从事水稻分子育种工作。 E-mail:yinhq98@163.com
  • 作者简介:王付华(1966-),男,湖南祁阳人,副研究员,博士,主要从事水稻分子育种工作。E-mail:wangfuhuahunan@163.com
  • 基金资助:
    国家重点研发计划项目(2017YFD0100400,2016YFD0100101)

New Herbicide-Resistant Japonica Rice Germplasms Created by EMS Mutagenesis

WANG Fuhua1,LI Zichao2,WANG Ya1,FU Jing1,YANG Wenbo1,YIN Haiqing1,WANG Shengxuan1,WANG Yuetao1,BAI Tao1,ZHANG Zhen3   

  1. (1.Institute of Cereal Crops,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.Agricultural College,China Agricultural University,Beijing 100193,China;3.Henan Agricultural Science and Technology Exhibition Hall,Zhengzhou 450000,China)
  • Received:2021-01-18 Published:2021-04-15 Online:2021-04-15

摘要: 为了创制抗除草剂水稻新种质,用EMS(甲基磺酸乙酯)溶液浸泡郑稻19干种子,在M2幼苗三叶期分别喷施112.5 g/hm2的甲咪唑烟酸和60 g/hm2的烟嘧磺隆,14 d后筛选抗除草剂突变体,并对突变体ALS(Acetolactate synthase)基因序列进行分析,找出ALS基因突变位点。结果表明,喷施甲咪唑烟酸14 d后,抗除草剂植株生长正常、叶色偏绿,敏感植株黄化、生长受抑制;喷施烟嘧磺隆14 d后,抗除草剂植株表现前期受抑制,但能缓慢恢复。用甲咪唑烟酸筛选63 000份M2家系,获得抗除草剂突变体6份(HF1—HF6),包括2种ALS氨基酸突变类型:Ser-627-Asn和Gly-628-Glu。用烟嘧磺隆筛选M2家系30 000份,获得抗除草剂突变体2份(HF7—HF8),包括2种ALS氨基酸突变类型:Pro-171-Ser和Ala-179-Val。在M2筛选到1个特定ALS碱基突变平均需23 250份M2家系。筛选到的抗甲咪唑烟酸突变体HF1(Gly-628-Glu)和HF2(Ser-627-Asn)在1倍大田常规除草剂剂量(112.5 g/hm2)下鲜质量减退率分别为13.09%和20.03%,显著小于郑稻19(P<0.05);在8倍大田常规除草剂剂量(900 g/hm2)下突变体仍能正常生长,表现强的甲咪唑烟酸抗性。对HF1、HF2分别喷施30 g/hm2和60 g/hm2烟嘧磺隆,其鲜质量减退率分别为24.81%、13.13%和34.13%、28.01%,显著小于郑稻19(P<0.05),表现一定的烟嘧磺隆抗性。综上,筛选到8份抗除草剂突变体材料,2份抗烟嘧磺隆,6份抗甲咪唑烟酸,其中2份抗甲咪唑烟酸突变体兼具烟嘧磺隆抗性,创制的抗除草剂材料可用于选育非转基因抗除草剂品种,也可作为创制ALS多位点突变种质的基础材料,进一步增强突变体对除草剂的抗性。

关键词: 粳稻; 抗烟嘧磺隆; 抗甲咪唑烟酸, 抗除草剂; EMS诱变; 种质创建

Abstract: In order to create new herbicide-resistant rice germplasms,the dry seeds of Zhengdao 19 were soaked in ethylmethane sulfonate( EMS) solution.At three-leaf stage,M2 seedlings were sprayed with imazapic(112.5 g/ha)and nicosulfuron(60 g/ha).The herbicide-resistant mutants were screened after 14 days.The ALS (acetolactate synthase) gene sequences of mutants were analyzed to find out the mutation sites.The results showed that the herbicide-resistant plants grew normally after spraying imazapic,the leaf kept green,while the leaves of sensitive lines yellowed,and their growth were inhibited;after spraying nicosulfuron,the growth of herbicide-resistant plants were inhibited in the early stage,but could recover slowly.A total of 63 000 M2 lines were screened with imazapic,and 6 imazapic-resistant mutants (HF1—HF6) were obtained,including two types of ALS mutations,Ser-627-Asn and Gly-628-Glu.A total of 30 000 M2 lines were screened with nicosulfuron, and 2 herbicide-resistant mutants(HF7—HF8) were obtained,including two types of ALS mutations, Pro-171-Ser and Ala-179-Val. To
obtain a specific ALS nucleotide mutation,an average of 23 250 M2 lines were needed to screen.The fresh weight reduction rates of imazapic-resistant mutants HF1 ( Gly-628-Glu) and HF2 ( Ser-627-Asn) were 13.09% and 20.03% respectively after spraying 1 time the conventional herbicide dose(112. 5 g/ha),which were significantly less than that of Zhengdao 19 (P<0.05); the mutants could still grow normally after spraying 8 times the conventional herbicide dose in the field,showing strong resistance to imazapic herbicides.The fresh weight reduction rates of mutants HF1 and HF2 were 24.81% and 13.13% after spraying 30 g/ha nicosulfuron,and were 34.13% and 28.01% after spraying 60 g/ha nicosulfuron,respectively,which were significantly less than those of Zhengdao 19 (P<0.05), showing certain nicosulfuron resistance. In summary, 8 herbicide-resistant mutant lines were obtained, 2 lines were resistant to nicosulfuron,6 lines were resistant to imazapic,and two of the imazapic-resistant mutants exhibited nicotinsulfuron resistance.The screened herbicide-resistant mutants could be used to breed non-GMO herbicide-resistant varieties,and also be used as a basic germplasm for the multi-site mutation of ALS,so as to further strengthen the herbicide resistance of mutants.

Key words: Japonica rice, Resistance to nicosulfuron, Resistance to imazapic, Resistance to herbicide;EMS mutagenesis, Germplasm innovation

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