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首页> 外文期刊>Journal of Nematology, with Annual of Applied Nematology >Penetration, post-penetration development, and reproduction of Meloidogyne incognita on Cucumis melo var. texanus.
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Penetration, post-penetration development, and reproduction of Meloidogyne incognita on Cucumis melo var. texanus.

机译：黄瓜根结线虫的根结线虫的穿透，穿透后发育和繁殖。得克萨斯州。

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摘要

Cucumis melo var. texanus, a wild melon commonly found in the southern United States and two accessions, Burleson Co. and MX 1230, expressed resistance to Meloidogyne incognita in preliminary experiments. To characterize the mechanism of resistance, we evaluated root penetration, post-penetration development, reproduction, and emigration of M. incognita on these two accessions of C. melo var. texanus. Additionally, we evaluated 22 accessions of C. melo var. texanus for their reaction against M. incognita in a greenhouse experiment. Fewer (P<=0.05) J2 penetrated the root system of C. melo var. texanus accessions (Burleson Co. and MX 1230) and C. metuliferus (PI 482452) (resistant control), 7 days after inoculation (DAI) than in C. melo 'Hales Best Jumbo' (susceptible control). A delayed (P<=0.05) rate of nematode development was observed at 7, 14, and 21 DAI that contributed to lower (P<=0.05) egg production on both accessions and C. metuliferus compared with C. melo. Though J2 emigration was observed on all Cucumis genotypes a higher (P<=0.05) rate of J2 emigration was observed from 3 to 6 DAI on accession Burleson Co. and C. metuliferus than on C. melo. The 22 accessions of C. melo var. texanus varied relative to their reaction to M. incognita with eight supporting similar levels of nematode reproduction to that of C. metuliferus. Cucumis melo var. texanus may be a useful source of resistance against root-knot nematode in melon.
机译：黄瓜瓜变种得克萨斯州，一种常见于美国南部的野生甜瓜，以及两个登录名Burleson Co.和MX 1230，在初步实验中均表现出对南方根结线虫的抗性。为了表征抗药性的机制，我们评估了C. melo var的这两个登录号上根结线虫的根部渗透，穿透后的发育，繁殖和迁移。得克萨斯州。另外，我们评估了22个C. melo var的种。得克萨斯人在温室实验中对隐孢子虫的反应。较少（P <= 0.05）J2渗透到C. melo var的根系中。接种（DAI）后第7天，比C. melo'Hales Best Jumbo'（易感对照）的德州种质（Burleson Co.和MX 1230）和metuliferus（PI 482452）（抗性对照）。与D. melo相比，在7、14、21 DAI时观察到线虫发育的延迟（P <= 0.05）速率，这有助于降低种质和C. metuliferus的产卵量（P <= 0.05）。尽管在所有黄瓜基因型上均观察到J2移出，但在Burleson Co.和metuliferus上从3到6 DAI观察到的J2移出率高于（C. melo）（P <= 0.05）。 C.melo var。的22个种。得克萨斯州相对于它们对隐孢子虫的反应有所不同，其中有八种支持线虫繁殖水平与灭顶线虫相似。黄瓜瓜变种得克萨斯可能是抵抗瓜根结线虫的有用来源。

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