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首页> 外文期刊>Plant Disease >Virulence of Bursaphelenchus xylophilus Isolated from Naturally Infested Pine Forests to Five Resistant Families of Pinus thunbergii
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Virulence of Bursaphelenchus xylophilus Isolated from Naturally Infested Pine Forests to Five Resistant Families of Pinus thunbergii

机译：从天然出没的松树林中分离出的Bursaphelenchus xylophilus对五个松属抗性科的毒力

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Akiba, M., Ishihara, M., Sahashi, N., Nakamura, K., Ohira, M., and Toda, T. 2012. Virulence of Bursaphelenchus xylophilus isolated from naturally infested pine forests to five resistant families of Pious thunbergii. Plant Dis. 96:249-252. Pine wilt disease is one of the most serious epidemic tree diseases in Japan, and resistant pine trees have been developed through a breeding program. To evaluate resistance of resistant families of Japanese black pine. Pious thunbergii, to the pinewood nematode, Bursaphelenchus xylophilus, isolated from the field, and to determine whether differentiation of pathogenicity to resistant pine families appears in the nematode isolates, seedlings of five resistant pine families were inoculated with 25 nematode isolates. Disease incidence 18 weeks after inoculation was significantly different among nematode isolates and among pine families but there was no interaction effect between nematode isolate and pine family. This indicates that nematode isolates did not have differential host specificity to resistant families of P thunbergii. Isolate Shimabara, a test isolate of the breeding program, showed the same degree of virulence as the highly virulent isolates frequently used in experiments. However, more virulent isolates than Shimabara were found among the isolates collected from natural pine forest. This indicated that B. xylophilus populations with higher virulence than Shimabara exist in the natural population. These findings are important in development of more efficient breeding procedures for resistant pine trees.
机译：M. Akiba，M。Ishihara，N。Sahashi，N。Nakamura，M。Ohira和T. Toda。2012。从自然出没的松树林中分离到五个抗性木僵菌（Pious thunbergii）的Bursaphelenchus xylophilus的毒力。植物病96：249-252。松树枯萎病是日本最严重的流行树病之一，并且已经通过育种计划开发了抗性松树。评估日本黑松的抗性科的抗性。从野外分离到松材线虫松材线虫（Bursaphelenchus xylophilus），并确定线虫分离株中是否出现了对抗性松科的致病性分化，用25种线虫接种了五个抗性松科的幼苗。线虫分离株和松树科接种后18周的疾病发生率显着不同，但线虫分离株与松树科之间没有相互作用。这表明线虫分离株对P. thunbergii的抗性家族没有不同的宿主特异性。繁殖程序的测试分离株岛原分离株显示出与实验中经常使用的高毒力分离株相同的毒力。然而，在从天然松林中收集到的分离株中，发现了比岛原更具毒性的分离株。这表明在自然种群中存在比岛原菌具有更高毒力的枯草芽孢杆菌种群。这些发现对于开发更有效的抗松树育种程序很重要。

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