基于COI基因5’端与3’端序列田间常见粉虱的分子鉴定

【目的】粉虱种类繁多,个体微小,其种类识别与鉴定常需借助分子生物学技术。本研究旨在明确线粒体COI基因(mitochondrial cytochrome c oxidase subunit I gene)5’端和3’端序列对常见种类粉虱识别鉴定的可行性。【方法】以我国田间常见的16种粉虱为对象,以COI基因5’端(641bp)和3’端(738bp)序列为靶标进行比对分析,以MEGA5.10软件的K2-P模型计算种内与种间遗传距离,以邻接法(NJ法)构建进化树并进行系统发育分析。【结果】当以5’端为靶标时,16种粉虱的种内平均遗传距离为0.0015,种间平均遗传距离为0.2897,种间遗传距离为...

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Published in昆虫学报 Vol. 57; no. 4; pp. 466 - 476
Main Author 李小凤 田虎 张金良 张桂芬 陈苗苗 万方浩
Format Journal Article
LanguageChinese
Published 2014
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ISSN0454-6296

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Summary:【目的】粉虱种类繁多,个体微小,其种类识别与鉴定常需借助分子生物学技术。本研究旨在明确线粒体COI基因(mitochondrial cytochrome c oxidase subunit I gene)5’端和3’端序列对常见种类粉虱识别鉴定的可行性。【方法】以我国田间常见的16种粉虱为对象,以COI基因5’端(641bp)和3’端(738bp)序列为靶标进行比对分析,以MEGA5.10软件的K2-P模型计算种内与种间遗传距离,以邻接法(NJ法)构建进化树并进行系统发育分析。【结果】当以5’端为靶标时,16种粉虱的种内平均遗传距离为0.0015,种间平均遗传距离为0.2897,种间遗传距离为种内遗传距离的193.1倍;而且种内、种间遗传距离没有重叠区域。当以3’端为靶标时种内平均遗传距离为0.0007,种间平均遗传距离为0.2817,种间遗传距离为种内遗传距离的402.4倍;但桑粉虱Pealiusmori与烟粉虱BemisiatabaciAsiaⅡ1的种内和种间遗传距离重叠。系统发育分析结果显示,以5’端为靶标时,16种粉虱可以形成独立的进化分支;以3’端为靶标时,除桑粉虱与传统分类学不一致外,其余种类均可形成独立的分支。【结论】结果表明,5’端序列更适用于基于DNA条形码技术的物种识别鉴定研究。
Bibliography:11-1832/Q
LI Xiao-Feng , TIAN Hu, ZHANG Jin-Liang, ZHANG Gui-Fen , CHEN Miao-Miao , WAN Fang- Hao( 1. State Key Laboratory for the Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; 2. Beijing Plant Protection Station, Beijing 100029, China; 3. Center for Management of Invasive Alien Species, Ministry of Agriculture, Beijing 100193, China)
Whitefly ;COI gene ; phylogenetic analysis ; genetic distance ; species identification ;DNA barcoding
[ Aim ] Whiteflies belong to a species-rich family with small body size. Identification of whitefly species is commonly done with the aid of molecular methods. This study aims to clarify the effectiveness of the 5'- and 3'-ends of the mitochondrial cytochrome c oxidase subunit Ⅰ (COI) gene sequences in molecular identification of common whiteflies species. [ Methods] The COI gene sequences in 16 whitefly species common in China were amplified using the 5'- and 3'-end universal primers. The
ISSN:0454-6296