Steinernema tarimense n. sp. (Rhabditida: Steinernematidae), a new entomopathogenic nematode from Tarim Basin, Xinjiang, China

文献类型： 外文期刊

第一作者： Zhan, F.

作者： Zhan, F.;Zhan, F.;Yang, R.;Bao, H.;Zhang, S.;Zhang, X.;Shi, Y.;Tian, C.;Li, H.;Tomalak, M.;Puza, V.;Guo, W.

作者机构：

关键词： morphological description; phylogenetic systematics; Populus euphratica forest; Steinernema species; Tarim Basin

期刊名称：JOURNAL OF HELMINTHOLOGY （ 影响因子：1.6； 五年影响因子：1.6 ）

ISSN： 0022-149X

年卷期： 2025 年 99 卷

页码：

收录情况： SCI

摘要： A novel entomopathogenic nematode (EPN) species, Steinernema tarimense n. sp., was isolated from soil samples collected in a Populus euphratica forest located in Yuli County within the Tarim Basin of Xinjiang, China. Integrated morphological and molecular analyses consistently place S. tarimense n. sp. within the 'kushidai-clade'. The infective juvenile (IJ) of new species is characterized by a body length of 674-1010 mu m, excretory pore located 53-80 mu m from anterior end, nerve ring positioned 85-131 mu m from anterior end, pharynx base situated 111-162 mu m from anterior end, a tail length of 41-56 mu m, and the ratios D% = 42.0-66.6, E% = 116.2-184.4, and H% = 25.5-45.1. The first-generation male of the new species is characterized by a curved spicule length of 61-89 mu m, gubernaculum length of 41-58 mu m, and ratios D% = 36.8-66.2, SW% = 117.0-206.1, and GS% = 54.8-82.0. Additionally, the tail of first-generation female is conoid with a minute mucron. Phylogenetic analyses of ITS, 28S, and mt12S sequences demonstrated that the three isolates of S. tarimense n. sp. are conspecific and form a sister clade to members of the 'kushidai-clade' including S. akhursti, S. anantnagense, S. kushidai, and S. populi. Notably, the IJs of the new species exhibited faster development at 25 degrees C compared to other Steinernema species. This represents the first described of an indigenous EPN species from Xinjiang, suggesting its potential as a novel biocontrol agent against local pests.

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