Genetic Variability Within and Among Populations of the Black‐tailed Prairie Dog

Chesser, Ronald K.

doi:10.1111/j.1558-5646.1983.tb05542.x

Cited by 103 publications

(46 citation statements)

References 36 publications

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“…Indeed, the Stanovoi mountain range, separating Southern Jakutia and Chara, must limit gene flow to a large extent. Additionally, the estimates of genetic subdivision among wood lemming populations at Id/i-i resemble FST values detected for other rodent species (Wright, 1978;Chesser, 1983;Navajias-Navarro & Britton-Davidian, 1989;Patton & Smith, 1990).…”

Section: Discussionsupporting

confidence: 59%

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Genetic differentiation among populations of Myopus schisticolor (the wood lemming) — isozyme variation

1995

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Section: Discussionsupporting

confidence: 59%

“…Protein electrophoresis has been widely used to describe genetic structure within populations of rodent species while there are only a few estimations of population differentiation at the macrogeographical level (Wright, 1978;Chesser, 1983; Navajias-Navarro & Britton- Davidian, 1989;Patton & Smith, 1990).…”

Section: Introductionmentioning

confidence: 99%

Genetic differentiation among populations of Myopus schisticolor (the wood lemming) — isozyme variation

1995

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“…These values are within the range of those reported for different rodent populations, like that of Thomomys bottae, with FST from 0.049 to 0.066 (Patton & Feder, 1981), Cynomys ludovicianus, with FST from 0.045 to 0.065 (Chesser, 1983) and different colonies of Marmota flaviventris, with FST of 0.07 (Schwartz & Armitage, 1980). In these three species, it is possible to define the actual breeding units.…”

Section: Discussionsupporting

confidence: 82%

“…For example, genetic drift can produce significant changes in the genetic pool of a population in a relatively short time, when populations are subdivided into small breeding units (Wright, 1980). In the variety of small mammals, mostly rodents, studied to date, genetic differentiation among subpopulations over short geographic distances appears to be the rule (Selander, 1970;Patton & Yang, 1977;Wright, 1978;Smith et al, 1978;Patton & Feder, 1981;Chesser, 1983). Geographic barriers, strict social systems, or low mobility of individuals, are usually factors that contribute to the existence of small breeding units, which may differ in genic frequencies according to migration rate and local selective pressures. Calomys laucha is a cricetid rodent that inhabits fields dedicated to agriculture in the temperate climate zone of Argentina known as 'humid pampa'.…”

Section: Introductionmentioning

confidence: 99%

Microgeographic distribution of allele frequencies in populations of Calomys laucha (Rodentia, Cricetidae)

1991

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The microgeographic differentiation of allelic frequencies was analysed in two population samples of Calomys laucha, collected in a grid set in cultivated fields at Laguna Larga (Córdoba province, Argentina). One of the samples (n = 79) was obtained in May (autumn), when the population density is at a maximum, and the other (n =85) in November (spring), at the onset of reproductive activity. FST values for the November sample show significant differences between the six groups over which the sample was divided. F values show an excess of homozygotes for some loci in both samples. F1 reveals an excess of homozygotes within each of the groups. These results indicate the existence of subdivision in the population. Because C. laucha is a reservoir host of the Junin virus, an agent of endemic disease, this social organization may have epidemiological implications. Stratification of C. laucha populations into small breeding units could be one of the factors responsible for the high genic variability detected in this species.

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“…In the final analysis (F-statistics and clustering) we included data from previous investigations from our laboratory (Karakousis & Triantaphyllidis, 1988. The Fstatistics were performed according to Weir & Cockerham's (1984) procedure and the differences of FST values among populations for each locus were tested with the f-test, x2 = 2NFST(k-1) with (k-1)(s--1) degrees of freedom, where N is the total sample size, k is the number of alleles for the locus and s is the number of subpopulations (Chesser, 1983). The deviation of F1 from zero was tested by x2= NF12, where N is the total sample size (Hedrick, 1985).…”

Section: Methodsmentioning

confidence: 99%

Genetic divergence and phylogenetic relationships among Salmo trutta L. (brown trout) populations from Greece and other European countries

1996

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In order to clarify the genetic structure and the phylogenetic relationships among brown trout (Satmo trutta) populations from Greece and other European countries starch gel electrophoresis was used. The populations come from various rivers from Greece and other European countries, flowing to the Atlantic or to the Mediterranean. Eleven enzymic systems were investigated. These correspond to 26 putative loci. A high degree of genetic polymorphism was found. The percentage of polymorphic loci ranged from 3.8 to 34.6 and the degree of expected heterozygosity from 0.016 to 0.1. F-statistics and clustering analyses indicated the existence of a high degree of differentiation. This differentiation is mainly between the Atlantic and the Mediterranean populations. Furthermore the Mediterranean populations seem to be divided into two groups. One includes the western Mediterranean populations and populations from western Greece and the other north-eastern Greek populations. The latter seem to be related to other Balkan populations and probably to Danubian or Black Sea populations. These results support the idea of two different lineages of Mediterranean brown trout populations, one of which is probably of aboriginal origin.

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Genetic Variability Within and Among Populations of the Black‐tailed Prairie Dog

Cited by 103 publications

References 36 publications

Genetic differentiation among populations of Myopus schisticolor (the wood lemming) — isozyme variation

Genetic differentiation among populations of Myopus schisticolor (the wood lemming) — isozyme variation

Microgeographic distribution of allele frequencies in populations of Calomys laucha (Rodentia, Cricetidae)

Genetic divergence and phylogenetic relationships among Salmo trutta L. (brown trout) populations from Greece and other European countries

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