摘要
本研究通过对玉米螟赤眼蜂Trichogramma ostriniae不同地理种群的线粒体DNACOI、COII和Cytb基因进行序列分析,研究了我国玉米螟赤眼蜂不同地理种群的遗传分化程度。结果发现,玉米螟赤眼蜂群体内线粒体基因具有丰富的遗传多态性,且各地理种群之间已产生不同程度的遗传分化。中性检测结果表明,玉米螟赤眼蜂进化遵循中性模型,且在过去呈现种群扩张趋势。玉米螟赤眼蜂不同地理种群之间的遗传距离在0.002～0.020之间。种群系统聚类树分支结构和Mantel相关性分析结果表明,玉米螟赤眼蜂各地理种群的遗传距离与地理距离间不具有显著的相关性。
Genetic differentiation among geographic populations of Trichogramma ostriniae was estimated by analyzing sequences of mitochondrial COI,COII and Cytb gene fragments.High nucleotide diversity was observed and genetic differentiation occurred among T.ostriniae populations to different extent.Tajima＇s D and Fu＇s Fs neutrality test indicated that molecular evolution of T.ostriniae species was in conformity with the principle of neutral theory,and the populations probably have experienced an expansion.Pairwise genetic distance between populations of T.ostriniae was within the range of 0.002-0.020.Cluster of phylogenic tree and results of Mantel analysis revealed that there was no significant correlation between genetic distance and geographical distance in populations of T.ostriniae.
出处
《中国生物防治学报》
CSCD
北大核心
2011年第1期16-21,共6页
Chinese Journal of Biological Control
基金
"十一五"国家科技支撑计划课题(2008BADA5B05)
现代农业产业技术体系建设专项资金(nycyti-02)
关键词
玉米螟赤眼蜂
地理种群
线粒体DNA
基因序列
遗传分化
Trichogramma ostriniae
geographic population
mtDNA
gene sequences
genetic differentiation
