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A new entomopathogenic nematode, Steinernema xinbinense n. sp (Nematoda: Steinernematidae), from north China

文献类型： 外文期刊

作者： Ma, Juan 1 ; Chen, Shulong 2 ; De Clercq, Patrick 1 ; Waeyenberge, Lieven 3 ; Han, Richou 4 ; Moens, Maurice 1 ;

作者机构： 1.Univ Ghent, Lab Agrozool, Dept Crop Protect, B-9000 Ghent, Belgium

2.Hebei Acad Agr & Forestry Sci, Inst Plant Protect, IPM Ctr Hebei Prov, Baoding 071000, Peoples R China

3.Inst Agr & Fisheries Res, B-9820 Merelbeke, Belgium

4.Guangdong Entomol Inst, Guangzhou 510260, Guangdong, Peoples R China

期刊名称：NEMATOLOGY （ 影响因子：1.442； 五年影响因子：1.485 ）

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收录情况： SCI

摘要： During a survey for entomopathogenic nematodes in northern China, a new species of Steinernema was isolated from soil samples collected from Xinbin county, Liaoning province. This nematode was obtained by the insect-baiting technique using last instar larvae of Galleria mellonella. It is described herein as S. xinbinense n. sp. The nematode can be separated from other described species of the group by morphological and morphometric characteristics of the different stages and by characterisation and phylogeny of DNA sequences of the D2D3 domain of the LSU or ITS regions of rDNA. This new species is characterised by the following morphological characters: infective third-stage juvenile with a body length of 694 (635-744) mu m, distance from head to excretory pore of 51 46-53) gm, tail length of 73 (61-81) mu m, E = 71 (65-78)%, presence of eight unevenly spaced and developed ridges in middle lateral field (i.e., nine lines). First generation male with well curved, yellowish spicules 56 (49-62) mu m long and gubernaculum 35 (30-41) mu m long, small mucron mostly present, first generation female with protruding vulva, tail conical with one or two small mucrons and D = 45 (4150)%. Cross hybridisation tests with S. tielingense, S. kraussei, S. feltiae and S. hebeiense showed that this species was reproductively isolated. The analyses of ITS-rDNA and D2D3 sequence confirm that the studied nematode isolate is a valid new species belonging to the 'feltiae-kraussei-oregonense' group.

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