Food Quality, Heterozygosity, and Fitness Correlates in Peromyscus polionotus

Teska, William R.; Smith, Michael H.; Novak, J. M.

doi:10.2307/2409291

Cited by 32 publications

(29 citation statements)

References 16 publications

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“…This general expectation has provided the incentive for numerous empirical studies of the relationship between individual heterozygosity, the number of loci from a sample for which an individual is heterozygous (Mitton & Pierce, 1980), and various components of fitness (Zouros et at., 1980;Koehn & Shumway, 1982;Pierce & Mitton, 1982;Garton, 1984;Hawkins et at., 1986Hawkins et at., , 1989Rodhouse et at., 1986;Bush et at., 1987; Danzmann et at., 1987;Diehl, 1988;Koehn et at., 1988;Gajardo & Beardmore, 1989;Ferguson & Drahushchak, 1990;Teska et at., 1990;Mopper et at., 1991;Pecon Slattery et al, 1991). These studies reveal that fitness generally increases with heterozygosity (see reviews by Beardmore, 1983;Mitton & Grant, 1984;Allendorf & Leary, 1986;Ledig, 1986;Zouros & Foltz, 1987;Mitton, 1989Mitton, , 1993.…”

Section: Discussionmentioning

confidence: 99%

Correlation between the individual heterozygosity of parents and their offspring

et al. 1993

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Specific formulations are derived for the correlation between the heterozygosity of a randomly mating parent and its offspring for a diallelic locus, and for the correlation when multiple loci are considered. The expected correlation is maximal, approaching r = 0.50, when allelic frequencies are highly asymmetric, and it is zero when the allelic frequencies are equal to 0.50. Parent-offspring correlations, up to a maximum of 0.50 for diallelic loci, indicate that levels of heterozygosity can respond to selection. Multilocus allozyme data from limber pine, Pinus flexilis, and from horses of standardbred and thoroughbred breeds are used to demonstrate correlations between a parent and its offspring. The Spearman rank correlation between the heterozygosity of a limber pine and the mean heterozygosity of her offspring is r = 0.45. Correlations in the horses range from r =0.16 to 0.32.

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Section: Discussionmentioning

confidence: 99%

Correlation between the individual heterozygosity of parents and their offspring

et al. 1993

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“…The advantages of metabolic efficiency conferred by heterozygosity would only make a difference when conditions challenge the energy budgets of developing genotypes (Koehn and Bayne 1988). For example, the absorption of food by mice does not vary among genotypes when food quality is high or intermediate, but when food quality is low, absorption efficiency increases with enzyme heterozygosity (Teska et al 1990). Similarly, enzyme genotypes are not related to the growth rates of the earthworm Eisemia foetida under ideal conditions, but growth rates are related to genotypes in stressful environments (Diehl 1989).…”

Section: Enzymes Catalyze Metabolic Reactions and Regulate Metabolismmentioning

confidence: 99%

Enzyme heterozygosity and developmental stability

Mitton¹

1995

Acta Theriol.

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“…For example, Mitton and co-workers have shown that within populations of the tiger salamander (Ambystoma tigrinum), both growth rate and scope for activity increase with allozyme heterozygosity (Mitton et al, 1986;Pierce and Mitton, 1982). Also, in one of the few studies on a mammal, Teska et al (1990) found that, on a low quality diet, more heterozygous individuals of the old field mouse, Peromyscus polionotus, had higher digestive Table 2). Error bars represent ±1 S.E.M.…”

Section: Discussionmentioning

confidence: 99%

Relationship between the energetic cost of burrowing and genetic variability among populations of the pocket gopher,T. bottae: does physiological fitness correlate with genetic variability?

Hildner

Soulé²

2004

Journal of Experimental Biology

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Many studies have reported relationships between genetic variability and fitness characters in invertebrates, but there is a paucity of such studies in mammals. Here, we use a statistically powerful paired sampling design to test whether the metabolic cost of burrowing, an important physiological trait in the pocket gopher, Thomomys bottae, correlates with genetic variability. Three pairs of pocket gopher populations were used, with each pair selected from a different subspecies and comprising one high genetic variability and one low genetic variability population. Genetic variability was measured using average allozyme heterozygosity and two measures of DNA fingerprint band sharing. In addition, the cost of burrowing for individuals from each population was determined from the oxygen consumption per gram of body mass per unit of work performed. Our results indicate that the cost of burrowing was significantly higher in populations with lower genetic variability (3-way ANCOVA, P=0.0150); mass-adjusted cost of burrowing in the low variability populations averaged 0.57±0.24·ml·O2·g -1 ·kgm -1 and that in the high variability populations averaged 0.42±0.19·ml·O2·g -1 ·kgm -1 . The magnitude of the population differences in cost of burrowing was associated with the magnitude of difference in genetic variability. We conclude that population differences in genetic variability are reflected in physiological fitness differences for a trait that is essential to gopher survival.

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Food Quality, Heterozygosity, and Fitness Correlates in Peromyscus polionotus

Cited by 32 publications

References 16 publications

Correlation between the individual heterozygosity of parents and their offspring

Correlation between the individual heterozygosity of parents and their offspring

Enzyme heterozygosity and developmental stability

Relationship between the energetic cost of burrowing and genetic variability among populations of the pocket gopher,T. bottae: does physiological fitness correlate with genetic variability?

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