Comparative Analysis of Population Genetic Structure in Bemisia tabaci (Gennadius) Biotype

Comparative Analysis of Population Genetic Structure in Bemisia tabaci (Gennadius) Biotypes B

and Q Based on ISSR Marker

CHU Dong;WAN Fang-hao;XU Bao-yun;WU Qing-jun;ZHANG You-jun

【期刊名称】《农业科学学报（英文版）》 【年(卷),期】2008(007)011

【摘要】Bemisia tabaci (Gennadius) biotypes B and Q are two invasive biotypes in the species complex. The comparison of the population genetic structure of the two biotypes is of significance to show their invasive mechanism and to their control. The intersimple sequence repeats (ISSR) marker was used to analyze the 16 B-biotype populations and 4 Q-biotype populations worldwide with a Trialeurodes vaporariorum population in Shanxi Province, China, and a B. tabaci non-B/Q-biotype population in Zhejiang Province, China, was used as control populations. The analysis of genetic diversity showed that the diversity indexes of biotype Q including Nei's gene diversity index, Shannon informative index, and the percentage of polymorphic loci were higher than those of biotype B. The high genetic diversity of biotype Q might provide the genetic basis for the excellent ecological adaptation. Cluster analysis suggested that the ISSR could not be used in the phylogenetic analysis though it could easily distinguish the biotypes of B. tabaci. The difference of the population genetic structure