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Molecular Marker Based Design for Breeding Wheat Lines with Multiple Resistance and Superior Quality

机译:基于分子标记的育种模具设计,具有多种抗性和优质品质

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摘要

There has not been a major wheat stem rust epidemic worldwide since the 1970s, but the emergence of race TTKSK of Puccinia graminis f. sp. tritici in 1998 presented a great threat to the world wheat production. Single disease-resistance genes are usually effective for only several years before the pathogen changes genetically to overcome the resistance. Stripe rust caused by Puccinia striiformis f. sp. tritici (Pst) is one of the most common and persistent wheat diseases worldwide. The development of varieties with multiple resistance is the most economical and effective strategy for preventing stripe rust and stem rust, the two main rust diseases constraining wheat production. Plateau 448 has been widely used in the spring wheat growing region in northwest China, but it has become susceptible to stripe rust and is susceptible to TTKSK. To produce more durable resistance to race TTKSK as well as to stripe rust, four stem rust resistance genes (Sr33, Sr36, Sr-Cad, and Sr43) and three stripe rust resistance genes (Yr5, Yr18, and Yr26) were simultaneously introgressed into Plateau 448 to improve its stem rust (Ug99) and stripe rust resistance using a marker-assisted backcrossing strategy combined with phenotypic selection. We obtained 131 BC1F5 lines that pyramided two to four Ug99 resistance genes and one to two Pst resistance genes simultaneously. Thirteen of these lines were selected for their TTKSK resistance, and all of them exhibited near immunity or high resistance to TTKSK. Among the 131 pyramided lines, 95 showed high resistance to mixed Pst races. Nine lines exhibited not only high resistance to TTKSK and Pst but also better agronomic traits and high-molecular-weight glutenin subunit compositions than Plateau 448.
机译:自20世纪70年代以来,全世界都没有是全世界的主要小麦茎生锈流行病,而是普昔锡·麦克林尼群岛群体的出现。 SP。 1998年Tritici对世界小麦生产造成了巨大的威胁。单一抗病基因通常仅在病原体转义克服抗性之前几年来有效。由普昔逊素曲霉素F引起的条纹锈。 SP。 Tritici(PST)是全球最常见和最持久的小麦疾病之一。具有多种抗性的品种的发展是预防条纹锈病和茎锈的最经济有效的策略,这两个主要的锈病限制了小麦产量。高原448已广泛应用于中国西北部的春小麦生长区,但它已经变得易受条纹锈蚀,并且易受TTKSK的影响。为了产生更耐用的耐血液TTKSK以及条纹锈病,四根茎锈病(SR33,SR36,SR-CAD和SR43)和三条纹抗锈病基因(YR5,YR18和YR26)同时渗入平台448使用标记辅助的回复策略改善其茎生锈(UG99)和条纹耐锈性,结合表型选择。我们获得了131个BC1F5线,使两到四个UG99抗性基因和一至两个PST抗性基因同时提高。选择这条线的十三个用于它们的TTKSK抗性,并且所有这些线条都表现出接近的免疫或高抗TTKSK。在131个精以大量的线中,95显示出高抗混合PST比赛。九条线不仅表现出高抗TTKSK和PST,而且还具有比平台448的更好的农艺性状和高分子量的谷蛋白亚基组合物。

著录项

  • 来源
    《Plant Disease》 |2020年第10期|共7页
  • 作者单位

    Chinese Acad Sci Northwest Inst Plateau Biol Key Lab Adaptat &

    Evolut Plateau Biota AEPB Xining 810008 Qinghai Peoples R China;

    Agr &

    Agri Food Canada Ottawa Res &

    Dev Ctr Ottawa ON K1A 0C6 Canada;

    Qinghai Prov Key Lab Crop Mol Breeding Xining 810008 Qinghai Peoples R China;

    Chinese Acad Sci Northwest Inst Plateau Biol Key Lab Adaptat &

    Evolut Plateau Biota AEPB Xining 810008 Qinghai Peoples R China;

    Agr &

    Agri Food Canada Ottawa Res &

    Dev Ctr Ottawa ON K1A 0C6 Canada;

    Agr &

    Agri Food Canada Ottawa Res &

    Dev Ctr Ottawa ON K1A 0C6 Canada;

    Agr &

    Agri Food Canada Ottawa Res &

    Dev Ctr Ottawa ON K1A 0C6 Canada;

    Chinese Acad Sci Northwest Inst Plateau Biol Key Lab Adaptat &

    Evolut Plateau Biota AEPB Xining 810008 Qinghai Peoples R China;

    Chinese Acad Sci Northwest Inst Plateau Biol Key Lab Adaptat &

    Evolut Plateau Biota AEPB Xining 810008 Qinghai Peoples R China;

    Sichuan Agr Univ Triticeae Res Inst Chengdu 611130 Sichuan Peoples R China;

    Chinese Acad Sci Northwest Inst Plateau Biol Key Lab Adaptat &

    Evolut Plateau Biota AEPB Xining 810008 Qinghai Peoples R China;

    Chinese Acad Sci Northwest Inst Plateau Biol Key Lab Adaptat &

    Evolut Plateau Biota AEPB Xining 810008 Qinghai Peoples R China;

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

    Ug99; disease resistance; gene pyramiding; HMW-GS; stripe rust;

    机译:UG99;抗病性;基因金字塔;HMW-GS;条纹生锈;

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