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Titolo:
Nucleotide variation at the CHALCONE ISOMERASE locus in Arabidopsis thaliana
Autore:
Kuittinen, H; 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
Titolo Testata:
GENETICS
fascicolo: 2, volume: 155, anno: 2000,
pagine: 863 - 872
SICI:
0016-6731(200006)155:2<863:NVATCI>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR POPULATION-GENETICS; DNA VARIATION; ELEVATIONAL GRADIENT; NATURAL-POPULATIONS; ADH LOCUS; EVOLUTION; RECOMBINATION; POLYMORPHISM; DROSOPHILA; MUTATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Kuittinen, H Univ Oulu, Dept Biol, PL3000, Oulu 90401, Finland Univ Oulu PL3000 Oulu Finland 90401 000, Oulu 90401, Finland
Citazione:
H. Kuittinen e M. Aguade, "Nucleotide variation at the CHALCONE ISOMERASE locus in Arabidopsis thaliana", GENETICS, 155(2), 2000, pp. 863-872

Abstract

An similar to 1.9-kb region encompassing the CHI-gene, which encodes chalcone isomerase, was sequenced in 24 worldwide ecotypes of Arabidopsis thaliana (L. ) Heynh. and in 1 ecotype of A. lyrata ssp, petraea. There was no evidence for dimorphism at the CHI region. A minimum of three recombination events was inferred in the history of the sampled ecotypes of the highly selfing A. thaliana. The estimated nucleotide diversity (theta(TOTAL) = 0.004, theta(SIL) = 0.005) was on the lower part of the range of the correspondingestimates for other gene regions. The skewness of the frequency spectrum toward an excess of low-frequency polymorphisms, together with the bell-shaped distribution of painwise nucleotide differences at CHI suggests that A. thaliana has recently experienced a rapid population growth. Although this pattern could also be explained by a recent selective sweep at the studied region, results from the other studied loci and from an AFLP survey seem tosupport the expansion hypothesis. Comparison of silent polymorphism and divergence at the CHI region and at the Adh1 and ChiA revealed in some cases a significant deviation of the direct relationship predicted by the neutraltheory, which would be compatible with balancing selection acting at the latter regions.

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Documento generato il 04/12/20 alle ore 13:24:56