Evolutionary Implications of Genic Variation among Insular Populations of Peromyscus maniculatus and Peromyscus oreas

Calhoun, Stuart W.; Greenbaum, Ira F.

doi:10.2307/1382095

Cited by 16 publications

(19 citation statements)

References 27 publications

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“…inhabiting an agricultural matrix. Previous studies of genetic variation that used allozyme methods detected less genetic variability and usually employed larger geographic scales (e.g., Smith 1979;McCullough and Chesser 1987;Calhoun and Greenbaum 1991). Although Schmidt (1999) found significant microsatellite genetic differentiation among populations of P. leucopus at a much larger geographic scale, this is one of the first P. leucopus studies to document significant levels of microsatellite genetic differentiation among populations at a local scale.…”

Section: Discussionmentioning

confidence: 68%

“…Deer mice on islands in British Columbia demonstrated significant isolation by distance based on Nei's genetic distance (Calhoun and Greenbaum 1991). Populations of the northern Idaho ground squirrel (Spermophilus brunneus brunneus) also had significant isolation by distance based on the correlation of number of migrants per generation with geographic distance (Gavin et al 1999).…”

Section: Between-population Genetic Variationmentioning

confidence: 99%

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Effects of habitat fragmentation on population genetic structure in the white-footed mouse (Peromyscus leucopus)

Mossman¹,

Waser²

2001

Can. J. Zool.

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Habitat fragmentation may have significant consequences for population genetic structure because geographic distance and physical barriers may impede gene flow. In this study, we investigated whether habitat fragmentation affects fine-scale genetic structure of populations of the white-footed mouse (Peromyscus leucopus). We studied 27 populations of P. leucopus, 17 in continuous forest and 10 in isolated woodlots. Populations were trapped in pairs that were either 500 or 2000 m apart. We estimated genetic variation at eight P. leucopus specific microsatellite DNA loci. We discovered significant genetic variation within all populations, but no significant differences in numbers of alleles or heterozygosity between populations. For given population pairs, we found significant genetic differentiation even at very short distances, based on multilocus F ST estimates. The amount of genetic differentiation between population pairs was similar in the two habitats. Distance had a marginal effect on genetic differentiation when comparing paired populations separated by 2000 m with those separated by 500 m. However, at a larger geographic scale, there was no evidence of isolation by distance. This study confirms that microsatellite-based studies have the potential to detect interpopulation differentiation at an extremely local scale, and suggests that habitat fragmentation has surprisingly few effects on P. leucopus genetic structure.Résumé : La fragmentation de l'habitat peut avoir des conséquences importantes sur la structure génétique d'une population parce que la distance géographique et les barrières physiques peuvent entraver le flux génique. Dans ce travail, nous avons tenté de déterminer si la fragmentation de l'habitat affecte la structure génétique à petite échelle des populations de Souris à pattes blanches (Peromyscus leucopus). Nous avons étudié 27 populations de P. leucopus, dont 17 en milieu forestier continu et 10 dans des boisés isolés. Les populations ont été soumises à des piégeages appariés à des distances de 500 ou 2000 m. Nous avons estimé que la variation génétique est reliée à huit locus microsatellites d'ADN spécifiques à P. leucopus. Nous avons trouvé de la variation génétique significative au sein de toutes les populations, mais pas de différence significative entre les populations quant au nombre de leurs allèles ou à leur hétéro-zygotie. Chez des paires données de populations, nous avons observé une différenciation génétique significative même à de très courtes distances au moyen d'estimations du F ST multiallélique. L'importance de la différenciation entre les paires de populations s'est avérée la même dans les deux habitats. La distance n'a qu'un effet mitigé sur la différenciation génétique lorsqu'on compare des paires de populations séparées par une distance de 2000 m ou par une distance de 500 m. Cependant, sur une échelle géographique plus grande, nous n'avons trouvé aucun indice d'isolement relié à la distance. Ces résultats confirment que les études basées sur les microsatellites peuvent...

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Section: Discussionmentioning

confidence: 68%

Section: Between-population Genetic Variationmentioning

confidence: 99%

Effects of habitat fragmentation on population genetic structure in the white-footed mouse (Peromyscus leucopus)

Mossman¹,

Waser²

2001

Can. J. Zool.

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“…The specific status of P. areas has been further supported by morphologic Allard et al 1987;Gunn and Greenbaum, 1986;Sullivan et al, 1990), and electrophoretic (Calhoun and Greenbaum, 1991) evidence.…”

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confidence: 83%

“…1 and Appendix n with localities 1-30 ( Fig. 1) corresponding to the same designations in Calhoun and Greenbaum (1991). Using the geographic criteria ofRall (1981), the specimens from localities 31-44 correspond to: P. m. algidus (locality 44, n = 10), P. m. hylaeus (locality 43, n = 14), P. m. keeni (localities 35-39, n = 145), P. m. macrorhinus (localities 31-34, n = 53), P. m. prevostensis (locality 40, n = 23), and P. sitkensis (localities 41 and 42, n = 39).…”

Section: Methodsmentioning

confidence: 99%

Systematic and Taxonomic Implications of Karyotypic, Electrophoretic, and Mitochondrial-Dna Variation in Peromyscus from the Pacific Northwest

Hogan

Hedin

Koh³

et al. 1993

Journal of Mammalogy

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Chromosomes, allozymes, and mitochondrial DNA (mtDNA) were analyzed to examine the taxonomic and systematic relationships of coastal Peromyscus from northern Washington to southern Alaska. All three datasets indicate that Peromyscus from this region constitute two distinct groups. One group comprises P. oreas, P. sitkensis, and several currently recognized subspecies of P. maniculatus including P. m. algidus, P. m. hylaeus, P. m. keeni, P. m. macrorhinus, and P. m. prevostensis. The second group comprises only populations of P. m. austerus. The. former group is differentiated from the latter by number of autosomal arms, allele-frequency differences, and mtDNA haplotypes. This dichotomy in karyotype, and the level of allozymic and mtDNA divergence between the groups suggest that the groups constitute distinct species. We recommend that P. oreas, P. sitkensis, P. maniculatus algidus, P. m. hylaeus, P. m. keeni, P. m. macrorhinus, and P. m. prevostensis be recognized under the specific epithet of Peromyscus keeni.The taxonomy of deer mice (Peramyscus) inhabiting the Pacific Northwest from Washington to southern Alaska has been complicated by extensive insular endemism resulting in a plethora of recognized taxa. Hall (1981) recognized two species in this region,P. maniculatusandP. sitkensis. From the Columbia River north to southern Alaska and west of the Cascade and Coastal mountain ranges, P. maniculatus was considered to comprise 27 subspecies distributed over the entire mainland and on most of the associated islands (Hall, 1981). Despite considerable evidence supporting the specific status of P. areas (Dice, 1949; J ohnson and Ostenson, 1959; Liu, 1954; Sheppe, J. Mamm., 74(4):819-831,1993 819 1961), Hall (1981) retained the taxon as a subspecies of P. maniculatus. Gunn andGunn (1988) reexamined the systematic status of areas and concluded that it is distinct from sympatric populations of P. m. austerus.These taxa can be discretely separated based on the number of autosomal arms (fundamental number, FN) in the karyotype. Populations of P. areas are characterized by a high FN (85-92), whereas P. m. austerus has a low FN (74-78). The absence of intermediate FNs in areas of sympatry was interpreted to indicate reproductive isolation.The specific status of P. areas has been further supported by morphologic (Allard and

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“…Multivariate morphological analyses ultimately revealed a single character (tail length >98 mm indicating P. keeni) that accurately classified greater than 95% of genetically identified specimens from mainland and insular populations from the Pacific Northwest (Allard and Greenbaum 1988). Although fixed allelic differences were lacking, allozymic analyses indicated a consistent dichotomy in allele frequencies between the two FN groups (Calhoun and Greenbaum 1991;Hogan et al 1993). Restriction-fragment analyses of the entire mitochondrial DNA (mtDNA) and of the ND3/ND4L/ND4 region of the mtDNA also separated these mice into their respective chromosomal groups (Hogan et al 1993(Hogan et al , 1997.…”

Section: Introductionmentioning

confidence: 94%

Mitochondrial DNA sequence variation and the specific identification of deer mice (<i>Peromyscus</i>) from Triangle Island, British Columbia, Canada

Chirhart¹,

Arianpour²,

Honeycutt³

et al. 2001

Can. J. Zool.

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Nucleotide sequences from the ND3, ND4L, and ND4 genes of the mitochondrial DNA of deer mice (Peromyscus) from Triangle Island, British Columbia, were analyzed and compared with those from reference samples of the geographically proximal species Peromyscus maniculatus and Peromyscus keeni. Variation among the deer mice from Triangle Island comprised four sequences with a total sequence divergence of 0.093%. One of these sequences characterized 52% of the 27 individuals analyzed; each of the other sequence variants occurred in smaller, but similar, proportions of the population sample. Phylogenetic and distance-clustering analyses uniformly grouped the sequences from the Triangle Island population and placed them within a cluster otherwise comprised of the P. keeni reference samples. The reference samples of P. maniculatus clustered distinctly and significantly outside of the P. keeni/Triangle Island deer mouse assemblage. These data indicate that, in contradiction to their current formal recognition as P. maniculatus, the deer mice from Triangle Island are representative of, and should be taxonomically relegated to, P. keeni.Résumé : Les séquences de nucléotides des gènes ND3, ND4L et ND4 de l'ADN mitochondrial ont été analysées chez les Peromyscus de l'île Triangle en Colombie-Britannique et comparées à celles d'échantillons de référence de Peromyscus maniculatus et de Peromyscus keeni provenant la région géogaphique immédiate. La variation chez les souris sylvestres de l'île Triangle implique quatre séquences, pour une divergence totale de 0,093 %. L'une de ces séquences a été trouvée chez 52 % des 27 souris examinées, chacune des autres variantes était présente dans des proportions moins élevées, mais similaires de la population étudiée. Des analyses phylogénétiques et des analyses de groupements basées sur les distances ont réuni de manière uniforme toutes les séquences de la population de l'île Triangle dans un même groupement, qui englobe aussi les échantillons de référence de P. keeni . Les échantillons de référence de P. maniculatus forment un groupement distinct significativement éloigné de celui formé par P. keeni et le peuplement de souris sylvestres de l'île Triangle. En dépit de l'identification actuelle de ces souris sous le nom de P. maniculatus, nos données indiquent que les souris sylvestres de l'île Triangle correspondent à l'espèce P. keeni et qu'elles devraient être reconnues comme telles taxonomiquement.[Traduit par la Rédaction] 2260 Chirhart et al.

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Evolutionary Implications of Genic Variation among Insular Populations of Peromyscus maniculatus and Peromyscus oreas

Cited by 16 publications

References 27 publications

Effects of habitat fragmentation on population genetic structure in the white-footed mouse (Peromyscus leucopus)

Effects of habitat fragmentation on population genetic structure in the white-footed mouse (Peromyscus leucopus)

Systematic and Taxonomic Implications of Karyotypic, Electrophoretic, and Mitochondrial-Dna Variation in Peromyscus from the Pacific Northwest

Mitochondrial DNA sequence variation and the specific identification of deer mice (<i>Peromyscus</i>) from Triangle Island, British Columbia, Canada

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