Demographic history and genetic diversity in West Indian Coereba flaveola populations

Bellemain, Eva; Gaggiotti, Oscar E.; Fahey, Anna L.; Bermingham, Eldredge; Ricklefs, Robert E.

doi:10.1007/s10709-012-9665-6

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…This creates genetic structure among islands where most of the genetic variation resides among islands rather than within islands (Hypothesis #3 in [4]). This prediction is supported by several empirical studies [5,6], with noteworthy exceptions [7,8]. In addition to geographical isolation, life-history characters, such as fruit type, have been identified as important factors in determining the distribution of genetic variation within and among islands.…”

Section: Introductionmentioning

confidence: 67%

Genome skimming and microsatellite analysis reveal contrasting patterns of genetic diversity in a rare sandhill endemic (Erysimum teretifolium, Brassicaceae)

2020

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Barriers between islands often inhibit gene flow creating patterns of isolation by distance. In island species, the majority of genetic diversity should be distributed among isolated populations. However, a self-incompatible mating system leads to higher genetic variation within populations and very little between-population subdivision. We examine these two contrasting predictions in Erysimum teretifolium, a rare self-incompatible plant endemic to islandlike sandhill habitats in Santa Cruz County, California. We used genome skimming and nuclear microsatellites to assess the distribution of genetic diversity within and among eight of the 13 remaining populations. Phylogenetic analyses of the chloroplast genomes revealed a deep separation of three of the eight populations. The nuclear ribosomal DNA cistron showed no genetic subdivision. Nuclear microsatellites suggest 83% of genetic variation resides within populations. Despite this, 18 of 28 between-population comparisons exhibited significant population structure (mean F ST = 0.153). No isolation by distance existed among all populations, however when one outlier population was removed from the analysis due to uncertain provenance, significant isolation by distance emerged (r 2 = 0.5611, p = 0.005). Population census size did not correlate with allelic richness as predicted on islands. Bayesian population assignment detected six genetic groupings with substantial admixture. Unique genetic clusters were concentrated at the periphery of the species' range. Since the overall distribution of nuclear genetic diversity reflects E. tereifolium's selfincompatible mating system, the vast majority of genetic variation could be sampled within any individual population. Yet, the chloroplast genome results suggest a deep split and some of the nuclear microsatellite analyses indicate some island-like patterns of genetic diversity. Restoration efforts intending to maximize genetic variation should include representatives from both lineages of the chloroplast genome and, for maximum nuclear genetic diversity, should include representatives of the smaller, peripheral populations.

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Section: Introductionmentioning

confidence: 67%

Genome skimming and microsatellite analysis reveal contrasting patterns of genetic diversity in a rare sandhill endemic (Erysimum teretifolium, Brassicaceae)

2020

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“…Four main factors promote biological evolution: mutation, gene flow, random genetic drift, and natural selection [28]. Levels of gene flow depend not only on the distances among populations, but also on the nature of the surrounding landscapes [29,30,31,32].…”

Section: Discussionmentioning

confidence: 99%

Population Genetics of Bactrocera minax (Diptera: Tephritidae) in China Based on nad4 Gene Sequence

Hong

Gao

Han

et al. 2019

Insects

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Bactrocera minax (Enderlein) (Diptera: Tephritidae) is an important citrus pest in Asia with a non-uniform distribution. In some locations, it had been reported to occur but was either eradicated or disappeared itself. To understand species dispersal of B. minax, we collected and analyzed 359 individuals from 18 localities in China. One mitochondrial DNA gene fragment (nad4) was used to investigate the genetic diversity and population genetic structure of B. minax. The populations were divided by phylogenetic analyses and statistical parsimony haplotype networks into three branches: a Central China (CC) branch, a Western China (WC) branch, and a Southern China (SC) branch. A total of 93 variable sites (15.6% of the 595 bp alignment) and 91 unique haplotypes were observed in the 359 individuals scored from the nad4 gene of the 18 B. minax populations. This indicated that B. minax had a high level of genetic diversity. These populations also showed a discrete distribution in both the scatter plots of genetic versus geographical distance for pairwise population comparisons and the median-joining network of haplotypes, which revealed the strong genetic structure of B. minax.

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Comparative Historical Demography of Migratory and Nonmigratory Birds from the Caribbean Island of Hispaniola

Fahey

Ricklefs

Latta³

et al. 2012

Evol Biol

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Demographic history and genetic diversity in West Indian Coereba flaveola populations

Cited by 5 publications

References 28 publications

Genome skimming and microsatellite analysis reveal contrasting patterns of genetic diversity in a rare sandhill endemic (Erysimum teretifolium, Brassicaceae)

Genome skimming and microsatellite analysis reveal contrasting patterns of genetic diversity in a rare sandhill endemic (Erysimum teretifolium, Brassicaceae)

Population Genetics of Bactrocera minax (Diptera: Tephritidae) in China Based on nad4 Gene Sequence

Comparative Historical Demography of Migratory and Nonmigratory Birds from the Caribbean Island of Hispaniola

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