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Titolo:
Genetic evidence for adaptation-driven incipient speciation of Drosophila melanogaster along a microclimatic contrast in "Evolution Canyon," Israel
Autore:
Michalak, P; Minkov, I; Helin, A; Lerman, DN; Bettencourt, BR; Feder, ME; Korol, AB; Nevo, E;
Indirizzi:
Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel Univ Haifa Haifa Israel IL-31905 fa, Inst Evolut, IL-31905 Haifa, Israel Univ Chicago, Dept Organism Biol & Anat, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 nism Biol & Anat, Chicago, IL 60637 USA
Titolo Testata:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
fascicolo: 23, volume: 98, anno: 2001,
pagine: 13195 - 13200
SICI:
0027-8424(20011106)98:23<13195:GEFAIS>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROSATELLITE LOCI; LAKE MALAWI; POPULATION BOTTLENECKS; BACKGROUND SELECTION; NATURAL-SELECTION; CICHLID FISHES; PATTERNS; MUTATIONS; DISTANCE; BIODIVERSITY;
Keywords:
thermotolerance; hsp70; P element; genetic distance; premating isolation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
65
Recensione:
Indirizzi per estratti:
Indirizzo: Nevo, E Univ Haifa, Inst Evolut, Mt Carmel, IL-31905 Haifa, Israel Univ Haifa Mt Carmel Haifa Israel IL-31905 IL-31905 Haifa, Israel
Citazione:
P. Michalak et al., "Genetic evidence for adaptation-driven incipient speciation of Drosophila melanogaster along a microclimatic contrast in "Evolution Canyon," Israel", P NAS US, 98(23), 2001, pp. 13195-13200

Abstract

Substantial genetic differentiation, as great as among species, exists between populations of Drosophila melanogaster inhabiting opposite slopes of asmall canyon. Previous work has shown that prezygotic sexual isolation andnumerous differences in stress-related phenotypes have evolved between D. melanogaster populations in "Evolution Canyon," Israel, in which slopes 100-400 m apart differ dramatically in aridity, solar radiation, and associated vegetation. Because the canyon's width is well within flies' dispersal capabilities, we examined genetic changes associated with local adaptation and incipient speciation in the absence of geographical isolation. Here we report remarkable genetic differentiation of microsatellites and divergence in the regulatory region of hsp70Ba which encodes the major inducible heat shock protein of Drosophila, in the two populations. Additionally, an analysis of microsatellites suggests a limited exchange of migrants and lack of recent population bottlenecks. We hypothesize that adaptation to the contrasting microclimates overwhelms gene flow and is responsible for the genetic and phenotypic divergence between the populations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/10/20 alle ore 23:42:59