Munstermann L E, Morrison A C, Ferro C, Pardo R, Torres M
Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, CT 06520-8034, USA.
J Med Entomol. 1998 Jan;35(1):82-9. doi: 10.1093/jmedent/35.1.82.
Lutzomyia longipalpis (Lutz & Neiva), the sand fly vector of American visceral leishmaniasis in the New World tropics, has a broad but discontinuous geographical distribution from southern Mexico to Argentina. A baseline for population genetic structure and genetic variability for this species was obtained by analyzing 5 local, peridomestic populations at the approximate center of its distribution, the Magdalena River Valley of central Colombia. Three populations of L. longipalpis from El Callejón, a small rural community, were compared with 2 populations from neighboring areas 12 and 25 km distant for genetic variation at 15 isoenzyme loci. The mean heterozygosity ranged from 11 to 16%, with 1.2 to 2.3 alleles detected per locus. Nei's genetic distances among the populations were very low, ranging from 0.001 to 0.007. Gene flow estimates based on FST indicated high levels of gene flow among local L. longipalpis populations, with minimal population substructuring.
长须罗蛉（Lutzomyia longipalpis，Lutz & Neiva）是新大陆热带地区美洲内脏利什曼病的白蛉传播媒介，其地理分布广泛但不连续，从墨西哥南部延伸至阿根廷。通过分析位于其分布大致中心的哥伦比亚中部马格达莱纳河谷的5个当地居家周边种群，获得了该物种的种群遗传结构和遗传变异性基线。将来自一个小乡村社区埃尔卡列洪的3个长须罗蛉种群与距离12公里和25公里的邻近地区的2个种群进行比较，分析了15个同工酶位点的遗传变异。平均杂合度在11%至16%之间，每个位点检测到1.2至2.3个等位基因。种群间的内氏遗传距离非常低，范围从0.001至0.007。基于FST的基因流估计表明，当地长须罗蛉种群间基因流水平较高，种群亚结构最小。
