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Titolo:
Evolution of abdominal pigmentation differences across species in the Drosophila dunni subgroup
Autore:
Hollocher, H; Hatcher, JL; Dyreson, EG;
Indirizzi:
Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA Princeton Univ Princeton NJ USA 08544 onary Biol, Princeton, NJ 08544 USA
Titolo Testata:
EVOLUTION
fascicolo: 6, volume: 54, anno: 2000,
pagine: 2046 - 2056
SICI:
0014-3820(200012)54:6<2046:EOAPDA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE TRAIT LOCI; REPRODUCTIVE ISOLATION; YELLOW GENE; MELANOGASTER; POPULATIONS; SIMULANS; ORGANIZATION; MELANIZATION; MAURITIANA; SPECIATION;
Keywords:
Caribbean; cline; Drosophila; pigmentation; selection; speciation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Hollocher, H Univ Notre Dame, Dept Biol Sci, Notre Dame, IN 46556 USA UnivNotre Dame Notre Dame IN USA 46556 e Dame, IN 46556 USA
Citazione:
H. Hollocher et al., "Evolution of abdominal pigmentation differences across species in the Drosophila dunni subgroup", EVOLUTION, 54(6), 2000, pp. 2046-2056

Abstract

The Drosophila dunni subgroup displays a nearly perfect latitudinal dine in abdominal pigmentation that likely resulted from selective forces acting in the habitat of each species during speciation. Here we characterize the nature of this clinal variation by developing a quantitative measure to assess variation in abdominal pigmentation within and between the D. dunni subgroup species. Using discriminant analysis, we confirm the existence of a dine and find that our quantitative measure of pigmentation distinguishes each of the species with singular efficacy. We then combine our quantitative phenotypic analysis of pigmentation with the phylogeny of the D. dunni subgroup species and map the species relationships into the three-dimensional morphological space defined by our pigmentation measures. In this manner, wecan visualize how the species have traversed the morphological pigmentation space during the course of speciation. Our analysis reveals that natural selection has caused overall intensity of pigmentation among the northernmost species of the dine to converge. Along with this convergence in phenotype has been a relaxation in expression of sexual dimorphism in these species, indicating a possible shift in the relative intensity of natural and sexual selection. Our analysis indicates an accelerated rate of change in pigmentation for the darkest species in addition to this species evolving a novel abdominal pigmentation trait.

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Documento generato il 14/07/20 alle ore 03:42:29