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Titolo:
DNA variation at the rp49 gene region in Drosophila madeirensis and D-subobscura from Madeira: inferences about the origin of an insular endemic species
Autore:
Khadem, M; Rozas, J; Segarra, C; Aguade, M;
Indirizzi:
Univ Barcelona, Fac Biol, Dept Genet, E-08071 Barcelona, Spain Univ Barcelona Barcelona Spain E-08071 t Genet, E-08071 Barcelona, Spain Univ Madeira, Ctr Invest Ciencias Agr, Dept Biol, Funchal, Portugal Univ Madeira Funchal Portugal iencias Agr, Dept Biol, Funchal, Portugal
Titolo Testata:
JOURNAL OF EVOLUTIONARY BIOLOGY
fascicolo: 3, volume: 14, anno: 2001,
pagine: 379 - 387
SICI:
1010-061X(200105)14:3<379:DVATRG>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR POPULATION-GENETICS; GEOGRAPHIC SUBDIVISION; SEQUENCE VARIATION; MELANOGASTER; POLYMORPHISM; EVOLUTION; RECOMBINATION; COLONIZATION; INVERSIONS; PHYLOGENY;
Keywords:
DNA polymorphism; Drosophila madeirensis; Drosophila subobscura; rp49 gene; speciation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Aguade, M Univ Barcelona, Fac Biol, Dept Genet, Diagonal 645, E-08071 Barcelona, Spain Univ Barcelona Diagonal 645 Barcelona Spain E-08071 lona, Spain
Citazione:
M. Khadem et al., "DNA variation at the rp49 gene region in Drosophila madeirensis and D-subobscura from Madeira: inferences about the origin of an insular endemic species", J EVOL BIOL, 14(3), 2001, pp. 379-387

Abstract

An similar to1.6-kb fragment spanning the rp49 gene was sequenced in 16 lines of Drosophila subobscura from Madeira and in 22 lines of the endemic species D. madeirensis. Nucleotide diversity in D. subobscura from Madeira (pi = 0.0081) Introduction was similar to that in lines from Spain carrying the O3+4 chromosomal arrangement (pi = 0.0080). No significant genetic differentiation was detected between insular and continental O3+4 lines of D. subobscura. These results are compatible both with a rather recent and massive colonization, and with multiple colonization events from the continent. Nucleotide diversity in D. madeirensis (pi = 0.0076) was Similar to that in D. subobscura, which deviates from the expectation, under strict neutrality, of a lower level of variation in an insular species with a small population size. The observed numbers of shared polymorphisms and of fixed differences between D. madeirensis and D, subobscura are compatible with the isolation model of speciation, where shared polymorphisms are due to common ancestry.

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Documento generato il 24/11/20 alle ore 07:46:15