Genetic consequences of Pleistocene fragmentation: Isolation, drift, and loss of diversity in rock iguanas (Cyclura)
Genetic consequences of Pleistocene fragmentation: Isolation, drift, and loss of diversity in rock iguanas (Cyclura)
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更新世破碎化的遗传后果:岩鬣蜥的隔离、漂移和多样性丧失(Cyclura)
DOI:
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发表时间:
2004
影响因子:
2.2
通讯作者:
S. K. Davis
中科院分区:
文献类型:
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作者:
C. Malone;C. R. Knapp;Jeremy F. Taylor;S. K. Davis
Pleistocene fragmentation of the Great BahamaBank resulted in one large and several smallpopulations of rock iguanas (Cycluracychlura). We explore patterns of geneticvariation within and among these islandpopulations using mitochondrial sequence data(partial ND4 to tRNALeu) in combinationwith eight polymorphic microsatellite loci (2to 10 alleles). Genetic data support twophylogeographically distinct groups, AndrosIsland and the Exuma cays. This resultconflicts with current subspecific taxonomy inwhich three subspecies are described. Analysesof allelic data indicate that most islandpopulations are currently demographicallyindependent. Pairwise Fst values between eightisland populations range from 0.18 to 0.63, and6 of 135 individuals are misassigned in anassignment test. Population-genetic diversityis characterized using standard measures suchas number of alleles and heterozygosity (H) inaddition to a normalized Shannon-Weaver indexof diversity (D). We find genetic diversity inthe Andros Island population comparable to thatin other non-piscine animals (avg. # ofalleles = 5, avg. H = 0.56, avg. D = 0.66) while inthe Exuma cays populations these measures aremuch lower (avg. # of alleles = 2.75–1.625, avg.H = 0.43–0.17, avg. D = 0.45–0.18). These dataare used to discuss conservation managementstrategies, including prioritization andtranslocation.
影响因子:
14.9
作者:
Weber,JL;May,PE
通讯作者:
May,PE
影响因子:
1.9
作者:
GUO, SW;THOMPSON, EA
通讯作者:
THOMPSON, EA
影响因子:
3.3
作者:
BirkyJr,CW;Fuerst,P;Maruyama,T
通讯作者:
Maruyama,T