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Identification of Wheat Leaf Rust Resistance Genes in Chinese Wheat Cultivars and the Improved Germplasms

机译：鉴定麦片锈病在中国小麦品种和改进种质中的抗性基因

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摘要

Leaf rust is an important wheat disease that is a significant hindrance for wheat production in most areas of the world. Breeding resistant cultivars can effectively and economically control the disease. In the present study, a wheat collection consisting of 100 cultivars from China and 18 improved germplasms from global landrace donors together with 36 known single Lr gene lines were tested with 20 strains of Puccinia triticina Eriks. in the seedling stage to postulate the Lr gene in the cultivars and germplasms. In addition, 12 diagnostic molecular markers specific to 10 Lr genes were used to detect the presence of the Lr genes in the wheat collection. Resistance to leaf rust of these cultivars at the adult plant stage was tested in fields under natural infection during the 2016 to 2018 cropping seasons in Baoding, Hebei Province. The gene postulation combined with molecular marker detection showed that six Lr genes (Lr1, Lr26, Lr33, Lr34, Lr45, and Lr46) were identified in 44 wheat accessions, including 37 cultivars and seven improved germplasms. Among the 44 wheat accessions postulated with Lr genes, Lrl was present in four accessions, Lr26 in 12 accessions, Lr33 in two accessions, Lr34 in 14 accessions, Lr45 in three accessions, and Lr46 in 16 accessions. In the collection of 118 cultivars/germplasms, 34 wheat lines displayed adult-plant resistance carrying Lr34, Lr46, and/or underdetermined genes. Therefore, a high level of leaf rust resistance can be achieved through the combination of all-stage resistance and adult-plant resistance genes together in wheat cultivars.
机译：叶锈是一种重要的小麦疾病，这是世界大部分地区的小麦产量的重要障碍。抗性品种可以有效和经济地控制疾病。在本研究中，由来自中国100种品种和来自全球Landrace捐赠者的100种改进种质组成的小麦收集与36种已知的单一LR基因系列进行了20条蛋白氏菌菌菌株。在幼苗阶段，将LR基因分解在品种和种质中。此外，使用12至10LR基因的12个诊断分子标记物用于检测小麦收集中LR基因的存在。在2016至2018年河北省保定季节的自然感染下，在成人植物阶段对成年植物阶段的叶片抗叶片生锈。结合分子标记检测的基因假设显示，在44个小麦涂层中鉴定了六种LR基因（LR1，LR26，LR33，LR34，LR45和LR46），包括37种品种和七种改进的种质。在用LR基因出现的44个小麦种植中，LRL在四个载体中存在，LR26，在12种附加，在两种载体中，LR33，LR34在14个附加，14个中的LR45，在三种附加，LR45中，16个加入中的LR46。在118种品种/种质的收集中，34个小麦线显示成人植物抗性携带LR34，LR46和/或未确定基因。因此，通过在小麦品种中的全阶段抗性和成人植物抗性基因组合，可以实现高水平的叶片抗锈蚀性。

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  • 来源
    《Plant Disease》 |2020年第10期|共12页
  • 作者

    Wu Hui; Kang Zhanhai; Li Xing; Li Yanyan; Li Yi; Wang Shuo; Liu Daqun;

  • 作者单位

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

    Hebei Agr Univ Technol Coll Plant Protect Technol Innovat Ctr Biol Control Crop Dis &

    Insec Baoding 071001 Hebei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物保护;
  • 关键词

    wheat leaf rust; gene postulation; slow-rusting resistance; molecular marker;

    机译：小麦叶锈;基因假设;慢生锈抗性;分子标记;

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