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Steinernema changbaiense sp n. (Rhabditida: Steinernematidae), a new species of entomopathogenic nematodes from Northeast China

文献类型： 外文期刊

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

作者机构： 1.Hebei Acad Agr & Forestry Sci, IPM Ctr Hebei Prov, Inst Plant Protect, Baoding 071000, Peoples R China

2.Univ Ghent, Dept Crop Protect, B-9000 Ghent, Belgium

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

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

期刊名称：RUSSIAN JOURNAL OF NEMATOLOGY （ 影响因子：0.286； 五年影响因子：0.464 ）

ISSN：

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收录情况： SCI

摘要： During an extensive survey for entomopathogenic nematodes in north China, a new species was recovered from soil samples; it is described herein as Steinernema changbaiense sp. n. This nematode was obtained from soil samples by the insect-baiting technique using last instar larvae of Galleria mellonella (Lepidoptera: Pyralidae). Steinernema changbaiense sp. n. is closely related to species in the 'feltiae-kraussei-oregonense' group. It is characterised by morphometrics of the infective juvenile (IJ) with a body length of 757 (730-790) mu m, distance from head to excretory pore of 61 (58-68) mu m, tail length of 77 (71-85) mu m, E % = 80 (73-88), and a lateral field pattern 2, 5, 6, 4, 2. The male of the first generation can be recognised by a spicule of 63 (56-70) mu m long and a gubernaculum of 40 (33-46) mu m long; the spicule is slender, the velum short. The first generation female has a symmetrical, slightly protruding vulva and a ratio D (%) of 49 (35-55). The new species differs distinctly from related species such as S. ashiunense, S. robustispiculum and S. monticolum by a different number of ridges in the lateral fields and the distance from the head to excretory pore of the IJ, and the body length, morphology of spicules and gubernaculum of the male. Cross hybridisation tests showed that these species are reproductively isolated. The sequences analyses of the internal transcribed spacers (ITS) of rDNA and D2-D3 domain of the LSU regions confirmed the new species identity.

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