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Titolo:
GENEALOGIES AND GEOGRAPHY
Autore:
BARTON NH; WILSON I;
Indirizzi:
UNIV EDINBURGH,INST CELL ANIM & POPULAT BIOL,KINGS BLDG EDINBURGH EH93JT MIDLOTHIAN SCOTLAND
Titolo Testata:
Philosophical transactions-Royal Society of London. Biological sciences
fascicolo: 1327, volume: 349, anno: 1995,
pagine: 49 - 59
SICI:
0962-8436(1995)349:1327<49:GAG>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANIMAL MITOCHONDRIAL-DNA; EFFECTIVE POPULATION-SIZE; AUTO-CORRELATION ANALYSIS; GENE FLOW; RARE ALLELES; EXTINCTION; EVOLUTION; MIGRATION; SEQUENCES; DISTANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
N.H. Barton e I. Wilson, "GENEALOGIES AND GEOGRAPHY", Philosophical transactions-Royal Society of London. Biological sciences, 349(1327), 1995, pp. 49-59

Abstract

Any sample of genes traces back to a single common ancestor. Each gene also has other properties: its sequence, its geographic location andthe phenotype and fitness of the org anism that carries it. With sexual reproduction, different genes have different genealogies, which gives us much more information, but also greatly complicates population genetic analysis. We review the close relation between the distributionof genealogies and the classic theory of identity by descent in spatially structured populations, and develop a simple diffusion approximation to the distribution of coalescence times in a homogeneous two-dimensional habitat. This shows that when neighbourhood size is large (as in most populations) only a small fraction of pairs of genes are closely related, and only this fraction gives information about current rates of gene flow. The increase of spatial dispersion with lineage age is thus a poor estimator of gene flow. The bulk of the genealogy depends on the long-term history of the population; we discuss ways of inferring this history from the concordance between genealogies across loci.

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Documento generato il 25/11/20 alle ore 00:05:13