中美洲长须罗蛉（双翅目：毛蠓科）种群间的遗传变异性

Genetic variability among populations of the sand fly Lutzomyia (Lutzomyia) longipalpis (Diptera: Psychodidae) from Central America.

作者信息

Mutebi J P, Rowton E, Herrero M V, Ponce C, Belli A, Valle S, Lanzaro G C

机构信息

Center for Tropical Diseases, University of Texas Medical Branch, Galveston 77555-0609, USA.

出版信息

J Med Entomol. 1998 Mar;35(2):169-74. doi: 10.1093/jmedent/35.2.169.

DOI:10.1093/jmedent/35.2.169

PMID:9538579

Abstract

Eleven Central American populations of Lutzomyia longipalpis (Lutz & Neiva) were analyzed for genetic variation at 16 enzyme loci. The aim was to study the genetic structure among populations within this region and to identify demes that may represent different sibling species. Genotypic frequencies within populations agreed with Hardy-Weinberg expectations, indicating that there were no sympatric sibling species among these 11 populations. Levels of genetic distance between pairs of populations were very low (< 0.02). Some substructing was evident, because after genotypes of all populations mere pooled, 7 of the 16 enzyme loci deviated from Hardy-Weinberg expectations. Estimates of effective migration rates among populations (Nm) were low (3.7), indicating that gene flow was restricted. These data explained observed genetic substructuring when all genotypes were pooled.

摘要

对来自中美洲的11个长须罗蛉种群（Lutzomyia longipalpis，Lutz & Neiva）的16个酶位点的遗传变异进行了分析。目的是研究该区域内种群间的遗传结构，并识别可能代表不同同胞种的同类群。种群内的基因型频率符合哈迪-温伯格预期，表明这11个种群中不存在同域同胞种。种群对之间的遗传距离水平非常低（<0.02）。一些亚结构是明显的，因为在将所有种群的基因型合并后，16个酶位点中的7个偏离了哈迪-温伯格预期。种群间有效迁移率（Nm）的估计值较低（3.7），表明基因流动受到限制。当所有基因型合并时，这些数据解释了观察到的遗传亚结构。