小麦抗穗发芽种质鉴评及其初步应用
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Section>江苏徐淮地区淮阴农业科学研究所

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江苏省农业科技自主创新资金项目(CX(21)3104);淮安市农业科学研究院发展基金(HNY202007);淮安市农业科学研究院高层次引进人才科研启动发展(0052023016B);江苏省种业振兴“揭榜挂帅”项目(JBGS〔2021〕051)


Evaluation of Wheat Pre-Harvest Sprouting Resistant Germplasm Resources and Their Preliminary application
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1.Huaiyin Institute of Agricultural Science in Xu-Huai Region of Jiangsu Province,Huai'2.'3.an 223001;4.Jiangsu Provincial Collaborative Innovation Center of Modern Industrial Technology for Grain Crops

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Jiangsu Province Agricultural Science and Technology Autonomous Innovation Fund Project (CX(21)3104); Development Fund of Huai''an Institute of Agricultural Science (HNY202007); Scientific Research Development of High-level Talents Introduced by Huai''an Institute of Agricultural Science (0052023016B); Jiangsu Province Seed Industry Revitalization

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    摘要:

    小麦穗发芽会造成小麦产量和品质的显著降低,近年来在黄淮地区逐渐加重,威胁我国、特别是黄淮区域小麦生产安全,抗性种质及功能分子标记的筛选和利用是减轻穗发芽危害的根本途径。本研究以多年田间自然鉴定的77份抗穗发芽种质及128份导入了5个抗性种质的轮回群体创制的高代品系为材料,采用整穗发芽法和籽粒发芽法对穗发芽抗性鉴定和评价,明确穗发芽功能标记Vp1B3、Dorm-B1和PM19在抗性种质中的分布并评估其育种效果。结果表明种质资源中49.35%(38份)达到中抗水平,其中仅57.89%(22份)含有Vp1Ba或(和)Dorm-B1b抗性标记,西农172、Kalango、淮麦40、豫农186同时含有2个功能标记;轮回选择对抗性改良具有较高的效率,高代品系中36.72%(47份)达到中抗以上,其中87.23%含有抗性位点,8份(17.02%)同时含有2个功能标记。抗性位点的累加可提升抗性水平,自然群体中穗发芽率和发芽指数从不含的36.45%和34.99%降至含有2个抗性位点的18.17%和25.87%,高代材料也呈现相同的趋势。高代材料中抗以上与其他材料在含有抗性位点数目间差异显著,含有2个标记材料在前者达到17.02%而在后者仅4.94%,表明利用功能标记可显著改良抗性。本研究将分子标记和表型鉴定相结合进行抗穗发芽种质筛选,并利用小麦轮回选择进行种质创新,为加速提升黄淮麦区的小麦穗发芽抗性水平提供依据。

    Abstract:

    Wheat pre-harvest sprouting reduces yield and flour quality significantly. It has been gradually aggravated in the Huanghuai region in recent times, jeopardizing the safety of wheat production in China, particularly in the Huanghuai region. Screening for pre-harvest sprouting resistant germplasm and available functional molecular markers is key to accelerating pre-harvest sprouting resistant breeding and mitigating its damage. In this study, 77 pre-harvest sprouting resistant germplasm identified naturally over many years and 128 advanced lines created from a rotational population introduced with five resistant germplasms were used as materials for pre-harvest sprouting resistance identification and evaluation by the whole-split germination and seed germination methods, as well as for identifying the distributions of the functional markers of spike germination, Vp1B3, Dorm-B1, and PM19, in the germplasm and evaluating the breeding effect of these markers. The results showed that 49.35% (38 out of 77) of germplasm resources reached the level of intermediate resistance, and 57.90% of them contained functional markers of Vp1Ba and/or Dorm-B1b for resistance, the germplasm resources of Xinong 172, Kalango, Huaimai 40 and Yunong 186 contained both of functional markers. Dwarf failing rotation selection had a high efficiency in improving resistance, with 36.72% (47) of the advanced lines achieved above intermediate resistance, of which 87.23% contained resistance loci and 8 (17.02%) contained two functional loci. The accumulation of resistance loci can enhance the level of resistance. In natural populations, the whole-split germination and seed germination decreased from 36.45% and 34.99%, respectively, in non-resistant individuals to 18.17 % and 25.87 % in individuals with two resistance loci The same pattern has been observed in advanced lines. There was a significant difference in the number of resistant loci between advanced materials and others, with a rate of 17.02 % for those with two markers compared to only 4.94 % for others indicating that using functional markers can significantly improve resistance. In this study, molecular markers and phenotypic characterization were combined for spike germination resistance germplasm screening, and germplasm innovation was carried out by using dwarf failing rotation selection, which provided a basis for accelerating the improvement of spike germination resistance level of wheat in the Yellow and Huaihai wheat areas.

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  • 收稿日期:2023-11-06
  • 最后修改日期:2023-12-14
  • 录用日期:2024-01-22
  • 在线发布日期: 2024-01-26
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