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Titolo:
Random amplified polymorphic DNA (RAPD) and quantitative trait analyses across a major phylogeographical break in the Mediterranean ragwort Senecio gallicus Vill. (Asteraceae)
Autore:
Comes, HP; Abbott, RJ;
Indirizzi:
Univ St Andrews, Sch Environm & Evolutionary Biol, St Andrews KY16 9TH, Fife, Scotland Univ St Andrews St Andrews Fife Scotland KY16 9TH Y16 9TH, Fife, Scotland
Titolo Testata:
MOLECULAR ECOLOGY
fascicolo: 1, volume: 9, anno: 2000,
pagine: 61 - 76
SICI:
0962-1083(200001)9:1<61:RAPD(A>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEA BEET POPULATIONS; GENETIC-STRUCTURE; VULGARIS ASTERACEAE; CHLOROPLAST DNA; DIVERSITY; MARKERS; NUCLEAR; LOCI; ALLOZYME; PATTERNS;
Keywords:
allozymes; chloroplast DNA; phylogeography; quantitative traits; RAPDs; Senecio gallicus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
59
Recensione:
Indirizzi per estratti:
Indirizzo: Comes, HP Univ Mainz, Inst Spezielle Bot, D-55099 Mainz, Germany Univ Mainz Mainz Germany D-55099 e Bot, D-55099 Mainz, Germany
Citazione:
H.P. Comes e R.J. Abbott, "Random amplified polymorphic DNA (RAPD) and quantitative trait analyses across a major phylogeographical break in the Mediterranean ragwort Senecio gallicus Vill. (Asteraceae)", MOL ECOL, 9(1), 2000, pp. 61-76

Abstract

Random amplified polymorphic DNA (RAPD) and quantitative trait variation of the widespread and ephemeral Senecio gallicus were surveyed in 11 populations sampled from the Iberian Peninsula and southern France. The aim of thestudy was to compare population relationships and levels of geographical differentiation with chloroplast (cp) DNA and allozyme variation assessed previously in the same populations. Employing multivariate statistics, a moderate level of intraspecific differentiation was observed among populations from Iberian coastal and inland regions for both RAPDs and quantitative traits. However, RAPDs provided greater resolution in identifying additional population structure within the hypothesized, Pleistocene refugial source area of the species in coastal Iberia. A major part of the geographical subdivision in RAPD and quantitative traits was concordant with the coastal vs, inland divergence as previously inferred from cpDNA haplotype frequencies, but strongly contrasted with the geographical uniformity of the species forallozymes. This concordance across various nuclear and cytoplasmic markers(RAPDs/quantitative traits, cpDNA) suggests that geographical uniformity for allozymes is more attributable to low rates of evolution and/or small genome sampling rather than high rates of pollen dispersal, slow rates of nuclear lineage sorting, or indirect balancing selection. The present study underscores the value of using additional classes of nuclear markers for narrowing the numbers of competing causal hypotheses about intraspecific cpDNA-allozyme discrepancies and their underlying evolutionary processes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 03:27:14