Titre :	Allozyme evidence for genetic autopolyploidy and high genetic diversity in tetraploid cranberry, Vaccinium oxycoccos (Ericaceae)
Type de document :	texte imprimé
Auteurs :	MAHY G., Auteur ; Bridget CONNORS B., Auteur ; Leo P. BRUEDERLE L.P., Auteur ; Michael VAN HOFWEGEN M., Auteur ; Nicholi VORSA N., Auteur
Année de publication :	2000
Importance :	1882-1889
Note générale :	Polyploidy has been important in the evolution of angiosperms and may significantly affect population genetic diversity and structure. Nineteen isoenzyme loci were studied in diploid and tetraploid populations of Vaccinium oxycoccos (Ericaceae), and the results are compared with data previously reportes for the related V. microcarpon. Diploid V. oxycoccos and V. macrocarpon were readily discriminated based on their allozymic variation. No eviddence for fixed heterozygosity was found in tetraploid V. oxycoccos. In contrast, all polymorphic loci exhibited both balanced and unbalanced heterozygotes, with some individuals exhibiting a pattern consistent with the presence of three alleles. There results support an autopolyploid origin for tetraploid V. oxycoccos. However, tetraploid V. oxycoccos possessed a suite of alleles not found in diploid V. oxycoccos ; half of these alleles were shared with V. macrocarpon. This suggests that autotetraploid V. oxycoccos may have undergone hybridization with V. macrocarpon or that the autotetraploid retained the genetic variation present in an ancestral diploid species. Following theoretical expectations, proposition of polymorphic loci, mean number of alleles, and observed heterozygosity were significantly higher for the autotetraploid than for the diploid. Mean inbreeding (Fis) was similar for diploid and tetraploid V. oxycoccos. The latter exhibited population differentiation (Fst) exceeding both diploid species.
Langues :	Anglais (eng)
Mots-clés :	physiologie végétale
Index. décimale :	Article (dossiers suspendus) ARTI
Saisie BD Flore :	Rien à saisir
Permalink :	https://portail-documentaire.cbnmc.fr/index.php?lvl=notice_display&id=16673

Allozyme evidence for genetic autopolyploidy and high genetic diversity in tetraploid cranberry, Vaccinium oxycoccos (Ericaceae) [texte imprimé] / MAHY G., Auteur ; Bridget CONNORS B., Auteur ; Leo P. BRUEDERLE L.P., Auteur ; Michael VAN HOFWEGEN M., Auteur ; Nicholi VORSA N., Auteur . - 2000 . - 1882-1889.
Polyploidy has been important in the evolution of angiosperms and may significantly affect population genetic diversity and structure. Nineteen isoenzyme loci were studied in diploid and tetraploid populations of Vaccinium oxycoccos (Ericaceae), and the results are compared with data previously reportes for the related V. microcarpon. Diploid V. oxycoccos and V. macrocarpon were readily discriminated based on their allozymic variation. No eviddence for fixed heterozygosity was found in tetraploid V. oxycoccos. In contrast, all polymorphic loci exhibited both balanced and unbalanced heterozygotes, with some individuals exhibiting a pattern consistent with the presence of three alleles. There results support an autopolyploid origin for tetraploid V. oxycoccos. However, tetraploid V. oxycoccos possessed a suite of alleles not found in diploid V. oxycoccos ; half of these alleles were shared with V. macrocarpon. This suggests that autotetraploid V. oxycoccos may have undergone hybridization with V. macrocarpon or that the autotetraploid retained the genetic variation present in an ancestral diploid species. Following theoretical expectations, proposition of polymorphic loci, mean number of alleles, and observed heterozygosity were significantly higher for the autotetraploid than for the diploid. Mean inbreeding (Fis) was similar for diploid and tetraploid V. oxycoccos. The latter exhibited population differentiation (Fst) exceeding both diploid species.
Langues : Anglais (eng)

Mots-clés :	physiologie végétale
Index. décimale :	Article (dossiers suspendus) ARTI
Saisie BD Flore :	Rien à saisir
Permalink :	https://portail-documentaire.cbnmc.fr/index.php?lvl=notice_display&id=16673