茄子果实绵疫病病原菌鉴定与种质资源抗性评价
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江苏省农业科学院蔬菜研究所/江苏省高效园艺作物遗传改良重点实验室

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江苏省重点研发计划(编号BE2021377)


Identification of Pathogens Conferring Phytophthora Fruit Rot and Their Reactions in Eggplant Germplasm Resource
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Institute of Vegetable Crops, Jiangsu Academy of Agricultural Sciences/Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing, 210014

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Key R&D Program of Jiangsu Province(No. BE2021377)

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    摘要:

    果实绵疫病是茄子生产上的重要病害,明确病原菌并筛选出抗病种质对茄子抗绵疫病品种选育具有重要意义。本研究对采自江苏省南京市和徐州市的茄子绵疫病果实进行病原菌的分离、纯化和鉴定,并利用获得的病原菌对146份国内外茄子种质资源进行抗性鉴定。结果表明:从两个地区的病样中各分离出一株菌株,两株菌株具有辣椒疫霉菌的典型特征,通过rDNA-ITS序列分析确定两株均为辣椒疫霉菌,接种茄子果实后发病症状为典型的绵疫病症状,分别命名为NJ1和XZ1。抗病性鉴定结果表明,种质资源间的抗性存在明显差异,抗病种质较少。3份种质资源对2个菌株具有良好抗性,可作为茄子抗绵疫病育种的抗源,其中G42和G114兼抗菌株NJ1和XZ1,G135抗菌株XZ1、中抗NJ1。本研究为茄子抗绵疫病遗传育种研究奠定了重要基础。

    Abstract:

    Phytophthora fruit rot is an important disease in eggplant. Identification of the disease-causing pathogens and the resistant germplasm accessions against these pathogens is useful in breeding of resistant varieties. In this study, the pathogens were isolated from the diseased eggplant fruit from Xuzhou city and Nanjing city of Jiangsu province, followed by tests for disease resistances in 146 globally-collected eggplant germplasm accessions. One strain was obtained from each of the samples in the two regions. Two strains (named NJ1 and XZ1) had typical characteristics of the phytophthora capsici, and both were P. capsici as revealed by rDNA-ITS sequence analysis. The eggplants post inoculation showed typical disease symptoms of phytophthora fruit rot. A variation on resistance among germplasm accessions was observed, and only several genotypes represented ideal resistance. Three germplasm accessions with ideal resistance to both strains could be used as a source of resistance for breeding eggplant against phytophthora fruit rot. Especially, G42 and G114 were resistant to both strains, while G135 was resistant to strain XZ1 and moderate resistant to strain NJ1. Collectively, this study has laid an important foundation for genetic breeding research on phytophthora fruit rot in eggplant.

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王 谧,周晓慧,刘松瑜,等.茄子果实绵疫病病原菌鉴定与种质资源抗性评价[J].植物遗传资源学报,2022,23(5):1281-1286.

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历史
  • 收稿日期:2022-02-07
  • 最后修改日期:2022-03-11
  • 录用日期:2022-04-01
  • 在线发布日期: 2022-09-09
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