Genetic resistance to root-knot nematode (Meloidogyne javanica) in eggplant (Solanum melongena)
Genetic resistance to root-knot nematode (Meloidogyne javanica) in eggplant (Solanum melongena)
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DOI：
10.1111/j.1439-0523.1996.tb00902.x
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发表时间：
1996-08-01
期刊：
影响因子：
2
通讯作者：
Charchar, JM
中科院分区：
文献类型：
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作者：
Boiteux, LS;Charchar, JM
通过使用受控温室试验，评估了 39 个茄子 Solanum melongena 基因型和一个 S. torvum 种质的种质库对根结线虫（Meloidogyne javanica）的抗性。在测试的基因型中观察到对该线虫物种引起的疾病有不同程度的抵抗力。在一种属于驯化的黑夜蛾物种的种质中检测到完全抗性（接种后 7 周内没有线虫卵团形成）。在一些商业茄子基因型中也观察到了良好水平的不完全抗性。这显然是首次报道在茄子基因库中对爪哇根腐病具有完全抗性的来源，我们的发现可以极大地促进将该性状纳入商业茄子品种中。 S. ron um 先前被描述为对几种根结线虫物种（包括爪哇根结线虫、M. arenaria 和 M. incognita）具有抗性，也被证实是对巴西根结线虫种群的抗性来源。因此，S. torvum 可以被认为是最有前途的根结线虫广谱抗性基因来源之一。广谱抗性对于专注于世界热带和亚热带地区品种开发的育种计划至关重要，在这些地区，不同根结线虫物种对土壤的多重侵染是一个非常常见的特征。
A germplasm collection of 39 eggplant Solanum melongena genotypes and one accession of S. torvum was evaluated for resistance to the root-knot nematode (Meloidogyne javanica) by using controlled greenhouse tests. Different degrees of resistance to the disease caused by this nematode species were observed among the genotypes tested. Complete resistance (no nematode egg mass formation up to 7 weeks after inoculation) was detected in one accession belonging to domesticated S. melongena species. Good levels of incomplete resistance were also observed in some commercial eggplant genotypes. This is apparently the first report of a source of complete resistance to M. javanica within the S. melongena gene pool and our finding could greatly facilitate the incorporation of this trait into commercial eggplant cultivars. S. ron um, previously described as resistant to several root-knot nematode species (including M. javanica, M. arenaria, and M. incognita) was also confirmed as a source of resistance to this Brazilian population of M. javanica. Therefore, S. torvum can be considered as one of the most promising sources of broad-spectrum resistance genes against root-knot nematodes. Broad-spectrum resistance is of paramount importance for breeding programmes focused on the development of cultivars for tropical and subtropical areas of the world where multiple infestation of soils with distinct Meloidogyne species is a very common feature.