Parallel geographical patterns of allozyme variation in two sibling Drosophila species

Anderson, P. R.; Oakeshott, John G.

doi:10.1038/308729a0

Cited by 61 publications

(37 citation statements)

References 23 publications

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“…Moreover, when two closely related species, like D. melanogaster and D. simulans, which have similar geographic distributions and population dynamics (David and Tsacas, 1981), exhibit parallel genetical trends, the argument for adaptation becomes still stronger (Tantawy and Mallah, 1961;Parsons, 1983;Anderson and Oakeshott, 1984;Hyytia et a!., 1985;Lemeunier et a!., 1986).…”

Section: Introductionmentioning

confidence: 99%

Thoracic trident pigmentation in natural populations of Drosophila simulans: a comparison with D. melanogaster

1988

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By contrast with Drosophila melanogaster, wild living D. simulans adults generally do not exhibit a thoracic dark pigmentation with a trident shape. This trident however appears when development occurs at low temperature. A study of 26 natural populations from various parts of the world revealed a significant latitudinal dine, expressed only at 17°C. The slope of this dine and the amplitude of the variations were, however, much lower than in D. melanogaster. Laboratory selection on equatorial and temperate populations of D. simulans led to the production of lines with a very dark trident expressed at all temperatures. Crosses between selected and unselected lines showed a main or partial influence of the X chromosome, a maternal effect and a reversal of dominance according to growth temperature. Thus, D. simulans exhibits a large amount of genetic interpopulational variability which is not fully expressed among its geographic populations. For thoracic pigmentation, a clear contrast exists between the homogeneity of D. simulans natural populations and the great geographic variation found in D. melanogaster, an observation comparable to that made for other genetical traits in the two sibling species.

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Section: Introductionmentioning

confidence: 99%

Thoracic trident pigmentation in natural populations of Drosophila simulans: a comparison with D. melanogaster

1988

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“…1(b)). Standard electrophoretic techniques (Oakeshott etal., 1981;Cabrera eta!., 1982;Anderson and Oakeshott, 1984) would have detected only four electrophoretic classes. Genetic test crosses were carried out among six of the ten classes and the results were consonant with the hypothesis that the additional variation mapped to the Est6 structural locus.…”

Section: Resultsmentioning

confidence: 94%

“…It is therefore possible that the population dynamics of Est6 alleles may be at least in part determined by those of the larger chromosomal polymorphism. In particular, it could be argued that the latitudinal dines for the major Est6-F and Est6-S alleles (Anderson and Oakeshott, 1984) may be the outcome of their disequilibrium with In(3L)P, the frequencies of which also vary clinally with latitude (Knibb et a!., 1981), However, this latter argument is discounted by the fact that the same dine for Est6 exists in D. simulans, a species with no known polymorphic inversions and the same major Est6 variants (Ashburner and Lemeunier, 1976;Anderson and Oakeshott, 1984).…”

Section: Resultsmentioning

confidence: 99%

“…melanogasler and D. simulans (Anderson and Oakeshott, 1984). Given the highly variable nature of the Es16 locus, it may well be that the major electrophoretic phenotypes showing the clinal variation are acting as markers for some other more physiologically relevant polymorphism in the gene.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of transferred Est6 in the females stimulates sperm utilisation and oviposition and affects her latency to remating (Gilbert, 1981;Scott, 1986). D. melanogaster and its sibling species D. simulans are both polymorphic for the same two major Est6 allozymes (Cabrera et a!., 1982 and references therein), and the action of natural selection between these allozymes is suggested by parallel latitudinal dines in gene frequencies in both species and on all three continents for which data have been collected (Oakeshott et al, 1981;Anderson and Oakeshott, 1984). Here, we report the application of more sensitive electrophoretic procedures to survey Est6 variation in an Australian population of D.…”

Section: Introductionmentioning

confidence: 99%

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High resolution electrophoretic variation at the esterase-6 locus in a natural population of Drosophila melanogaster

1987

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Drosophila melanogaster

Wixon

O’Kane

2000

Yeast

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A sample of 1359 males and 1 259 females from a natural population of Drosophila melanogaster of the Canary Islands was simultaneously examined for wing length, inversion polymorphisms, and gene variation at 10 allozyme loci. Correlations and nonrandom associations between those genetic traits were estimated. In contrast to previous studies, large amounts of linkage disequilibrium have been found. Frequencies of significant gametic associations between linked and unlinked elements were 100% and 25%, respectively, for chromosome inversions, 81% 6nd 4% for chromosome inversions, and allozymes, and 36% and 0% for pairs of allozymes. Temporal stability in chromosome and allozyme frequencies and the average number of alleles per locus rule out a recent bottleneck effect. Mean and coefficient of variation of wing length are correlated with the degree of heterokaryotypy (both negatively) and with the degree of heterozygosis (positively for the mean, negatively for the coefficient of variation), mainly implying chromosome 3 elements. Individuals with wing length above (or below) a standard deviation from the population mean showed characteristics for the other genetic traits which resembled those of northern (or southern) populations of the species.Drosophila melanogaster / wing size / chromosomal inversion / enzyme / linkage disequilibrium Résumé -Associations entre un caractère quantitatif et des caractères chromosomiques et enzymatiques dans une population naturelle de Drosophila melanogaster.Un échantillon de 1 359 mâles et 1 259 femelles d'une population naturelle de Drosophila melanogaster des îles Canaries a été étudiée pour la longueur de l'aile, le polymorphisme des inversions et les variations géniques à 10 locus d'allozymes. Les corrélations et les

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Parallel geographical patterns of allozyme variation in two sibling Drosophila species

Cited by 61 publications

References 23 publications

Thoracic trident pigmentation in natural populations of Drosophila simulans: a comparison with D. melanogaster

Thoracic trident pigmentation in natural populations of Drosophila simulans: a comparison with D. melanogaster

High resolution electrophoretic variation at the esterase-6 locus in a natural population of Drosophila melanogaster

Drosophila melanogaster

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