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首页> 外文期刊>Plant Disease >Variation within Lactuca spp. for Resistance to Impatiens necrotic spot virus
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Variation within Lactuca spp. for Resistance to Impatiens necrotic spot virus

机译：Lactuca SPP内的变异。 抗抗病症的坏死斑点病毒

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摘要

Lettuce (Lactuca sativa L.) production in coastal California, one of the major lettuce-producing areas of the United States, is regularly affected by outbreaks of Impatiens necrotic spot virus (INSV), a member of the genus Orthotospovinis. Transmission of INSV among lettuce crops in this growing region has been attributed predominantly to the western flower thrips (Frankliniella occidentalis). INSV is acquired by first- or second-instar thrips nymphs feeding on infected host plants (not necessarily lettuce). The virus replicates within the insect vector, and is transmitted to new plants by adult thrips as they feed on epidermal and mesophyll cells of susceptible host plants. All currently grown cultivars of lettuce are susceptible to the disease. Screening lettuce for resistance to INSV under field conditions is problematic because natural infections appear sporadically and the virus is not evenly distributed across infected fields. We have developed a greenhouse-based assay that uses viruliferous thrips in combination with mechanical inoculation that allows dependable, year-round screening for resistance. In all, 89 cultivars, breeding lines, and plant introductions of cultivated lettuce, together with 53 accessions from 11 other Lactuca spp., 4 accessions from two dandelion (Taraxacum) species, and 4 tomato (Solarium lycopersicum L.) lines were evaluated for resistance to INSV. All tested material was susceptible to INSV to varying degrees, with the exception of two tomato lines that carry the Sw-5 gene that confers resistance to Tomato spotted wilt virus, a virus closely related to INSV. In cultivated lettuce, a partial resistance to INSV was observed in cultivars Amazona, Ancora, Antigua, Commodore, Eruption, Iceberg, La Brillante, Merlot, Telluride, and Tinto. Limited comparison of the greenhouse-based screening results with the data from opportunistic evaluations of resistance on 775 lettuce accessions from six field trials indicates consistency of results from both greenhouse and field environments. The most resistant lettuce accessions are being incorporated into our breeding program for introgression of resistance into lettuce breeding lines.
机译：莴苣（Lactuca Sativa L.）在美国沿海加利福尼亚州的美国沿海地区生产，经常受到爆发的爆发的爆发性爆发性斑点病毒（INSV），原子缺失。在这一增长地区的莴苣作物中insv的传播主要归因于西方花蓟马（Frankliniella occidentalis）。 insv是由饲喂受感染的宿主植物（不一定生菜）饲喂的第一或第二龄血脂的术语。该病毒在昆虫载体内重复，并且通过成人蓟马传递给新植物，因为它们饲料在易感宿主植物的表皮和叶片细胞上。所有目前生育的生菜都易受这种疾病的影响。筛选莴苣在现场条件下对INSV的抵抗是有问题的，因为自然感染阳性出现，病毒均匀地分布在受感染的领域。我们开发了一种基于温室的测定，使用毒犬蓟马与机械接种相结合，允许可靠，全年筛选抗性。在所有，89种品种，育种线和植物培养和植物介绍以及来自11种其他乳酸SPP的53种，来自两个蒲公英（蒲公英）种类的4种，评价了4种番茄（日光浴蛋白L.）线。抵抗insv。所有测试的材料易受insv到不同程度的影响，除了携带SW-5基因的两条番茄系赋予番茄斑枯萎病毒的抗性，一种与INSV密切相关的病毒。在培养的生菜中，在品种亚马逊，Ancora，Antigua，Commodore，Bluption，冰山，La Brillante，Merlot，Telluride和Tinto中观察到患者对Insv的部分抗性。基于温室的筛选结果的比较有限与来自六个场试验的775生菜的机会评估中的抵抗力的数据表明温室和现场环境结果的一致性。最具抗性的莴苣载体被纳入我们的育种程序，以迟钝抗生素育种线。

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  • 来源
    《Plant Disease》 |2018年第2期|共8页
  • 作者

    Simko Ivan; Richardson Claire E.; Wintermantel William M.;

  • 作者单位

    USDA ARS US Agr Res Stn Crop Improvement &

    Protect Res Unit Salinas CA 93905 USA;

    USDA ARS US Agr Res Stn Crop Improvement &

    Protect Res Unit Salinas CA 93905 USA;

    USDA ARS US Agr Res Stn Crop Improvement &

    Protect Res Unit Salinas CA 93905 USA;

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  • 正文语种 eng
  • 中图分类 植物保护;
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