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首页> 外文期刊>Nematropica >VIRULENCE OF FOUR FLORIDA ISOLATES OF MELOIDOGYNE MAYAGUENSIS TO SELECTED SOYBEAN GENOTYPES
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VIRULENCE OF FOUR FLORIDA ISOLATES OF MELOIDOGYNE MAYAGUENSIS TO SELECTED SOYBEAN GENOTYPES

机译：四种蛋黄变种花色毒株对大豆基因型的毒力

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Cetintas, R., J. A. Brito, and D. W. Dickson. 2008. Virulence of four Florida isolates of Meloidogyne mayaguensis to selected soybean genotypes. Nematropica 38:127-135. The reproduction and virulence of four Florida isolates of Meloidogyne mayaguensis to the root-knot nematode resistant ('Benning', 'Boggs', 'Bragg', 'Forrest', 'Haskell', 'Lee 74'and G-93-9009) and susceptible ('Bossier', 'GoSoy 17', 'Pickett') soybean genotypes were evaluated in a growth chamber. Two levels of each nematode isolate (low = 2,500 eggs or J2/ plant; high = 5,000 eggs or J2/ plant) were used. None of the genotypes were immune to the isolates of M. mayaguensis. Differences in reproduction and virulence were detected among the nematode isolates at both inoculum levels. All four isolates overcame the root-knot nematode resistance genes, including the Mir1 gene. The root-knot nematode resistant soybean 'Bragg' was resistant (egg mass index values (EMI) ranging from 0.1-2.0) to isolates 2 and 3, but susceptible (EMI > 2) to isolate 1 at both inoculum levels, whereas 'Forest', which possess the Mir1 gene was resistant to only isolate 3. The root-knot nematode resistant soybean 'Boggs' and line G93-9009 were resistant to isolate 4. All soybean genotypes were susceptible to isolate 1 at both inoculum levels, except that soybean 'Lee 74' sustained low egg mass (EMI = 2.00) at the low inoculum level (P ≤ 0.05). The results of this study showed for the first time that gene(s) that confer resistance to at least one of the major root-knot nematode species in soybean may also confer resistance to some isolates of M. mayaguensis.
机译：Cetintas，R.，J。A. Brito和D.W. Dickson。 2008。四个佛罗里达州的梅格诺吉亚菌对选定的大豆基因型的毒力。 Nematropica 38：127-135。佛罗里达州的四种根结线虫对根结线虫具有抗性（'Benning'，'Boggs'，'Bragg'，'Forrest'，'Haskell'，'Lee 74'和G-93-9009）在生长室中评估了易感（Bossier，GoSoy 17，Pickett）基因型。每个线虫分离株分为两个水平（低= 2,500个卵或J2 /植物;高= 5,000个卵或J2 /植物）。没有一个基因型对玛雅支原体的分离物免疫。在两种接种水平的线虫分离物中检测到繁殖和毒力的差异。所有四个分离株都克服了根结线虫抗性基因，包括Mir1基因。根结线虫抗性大豆“ Bragg”对分离物2和3具有抗性（鸡蛋质量指数值（EMI）在0.1-2.0范围内），但在两种接种物水平上对分离物1均具有抗性（EMI> 2），而“森林”带有Mir1基因的大豆'仅对分离株3具有抗性。抗根结线虫的大豆'Boggs'和品系G93-9009对分离株4具有抗性。所有大豆基因型在两种接种物水平上均对分离株1敏感。大豆“ Lee 74”在低接种量（P≤0.05）下仍保持较低的卵重（EMI = 2.00）。这项研究的结果首次表明，赋予大豆至少一种主要根结线虫物种抗性的基因也可能赋予某些玛雅分支杆菌的抗性。

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