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Titolo:
Phenotypic plasticity in sympatric diploid and autotetraploid Dactylis glomerata
Autore:
Bretagnolle, F; Thompson, JD;
Indirizzi:
CNRS, Ctr Ecol Fonct & Evolut, F-34293 Montpellier 5, France CNRS Montpellier France 5 Fonct & Evolut, F-34293 Montpellier 5, France
Titolo Testata:
INTERNATIONAL JOURNAL OF PLANT SCIENCES
fascicolo: 2, volume: 162, anno: 2001,
pagine: 309 - 316
SICI:
1058-5893(200103)162:2<309:PPISDA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
GRASS ARRHENATHERUM-ELATIUS; HABITAT DIFFERENTIATION; TETRAPLOID POPULATIONS; PLANTAGO-MEDIA; REACTION NORMS; GALICIA SPAIN; POLYPLOIDY; EVOLUTION; GENETICS; HETEROZYGOSITY;
Keywords:
phenotypic plasticity; norms of reaction; polyploidy; Poaceae;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Bretagnolle, F Univ Neuchatel, Inst Bot, Lab Phanerogamie, Emile Argand 11, CH-2007 Neuchatel, Switzerland Univ Neuchatel Emile Argand 11 Neuchatel Switzerland CH-2007
Citazione:
F. Bretagnolle e J.D. Thompson, "Phenotypic plasticity in sympatric diploid and autotetraploid Dactylis glomerata", INT J PL SC, 162(2), 2001, pp. 309-316

Abstract

It is often supposed that increased heterozygosity of autopolyploids provides a greater stability of phenotypic expression compared with related diploids and, hence, a greater ability to survive in marginal diploid environments or the ability to colonize new environments. The aim of this study was to compare the phenotypic plasticity of fitness-related characters in diploid and derivative autotetraploid Dactylis glomerata from genotypes sampled in their zone of natural sympatric occurrence in northern Spain. To achievethis aim, nine genotypes were grown in a range of controlled environments. We found no evidence for consistent differences in plasticity between diploids and related tetraploids. We did find, however, consistent differences between diploids and tetraploids in the mean values of the set of examined fitness-related characters. Such differences could be critical for the maintenance and evolutionary success of polyploids.

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Documento generato il 01/04/20 alle ore 00:24:30