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Isolation and identification of a new Bombyx mori nucleopolyhedrovirus strain isolated from Yunnan, China

文献类型: 外文期刊

作者: Tang, Fenfen 1 ; Zhang, Yonghong 1 ; Shao, Yulan 1 ; Zhu, Feng 1 ; Huang, Ping 1 ; Bai, Xingrong 1 ;

作者机构: 1.Yunnan Acad Agr Sci, Inst Sericulture & Apiculture, Mengzi 661101, Yunnan, Peoples R China

2.Yunnan Agr Univ Kunming, Coll Plant Protect, Kunming 650201, Peoples R China

关键词: Bombyx mori nucleopolyhedrovirus;strain identification;polh;bro

期刊名称:SCIENCEASIA ( 影响因子:0.615; 五年影响因子:0.708 )

ISSN: 1513-1874

年卷期: 2017 年 43 卷 1 期

页码:

收录情况: SCI

摘要: Bombyx mori nucleopolyhedrovirus (BmNPV) is a silkworm pathogen that causes serious economic losses in sericulture. In this study, a new BmNPV strain, designated as BmNPV-YN1, from Yunnan (China), was isolated and identified through molecular identification. Sequence analysis results revealed that polyhedrin (polh) presented the highest identity among various BmNPVs; this gene indicated that BmNPV-YN1 is a BmNPV strain. The baculovirus repeated-ORF (bro) genes of this isolate were different from those of six BmNPV strains (BmNPV-T3, BmNPV-ZJ, BmNPV-GX, BmNPV-India, BmNPV-Cubic, and BmNPV-Brazilian). The BmNPV-YN1 bro family includes bro-a, bro-b, bro-c, bro-d, and bro-e, which are similar to those of BmNPV-T3. Sequence alignment results further showed the differences in the composition and sequences of the bro family members among various strains. The bro-d sequences were also phylogenetically analysed. Results demonstrate that BmNPV-YN1, BmNPV-Cubic, and BmNPV-India are closely related. Despite this close relationship, BmNPV-YN1 belongs to a distinct cluster. The BmNPV DNA was subjected to restriction endonuclease analysis and the obtained results provided additional evidence supporting the identity of the novel BmNPV-YN1 strain. Indeed, BmNPV-YN1 isolated from Yunnan is a new BmNPV strain. The proposed method can be used to rapidly and accurately detect and identify BmNPVs strains.

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