Nom du corpus

Corpus Systématique Végétale

Titre du document

Reproductive strategies of diploid and polyploid populations of arctic Draba ( Brassicaceae )

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Brassicaceae
  • Draba
  • Polyploidy
  • fixed heterozygosity
  • reproductive biology
  • protogyny
  • delayed selfing
  • seed set
  • inbreeding
  • mixed mating
  • Arctic-alpine plants
Nom du fichier dans la ressource
Syst_veg6_v2_023180
Auteur(s)
  • Christian Brochmann
Affiliation(s)
  • Botanical Garden and Museum, University of Oslo, Trondheimsveien 23B, N-0562, Oslo, Norway
Résumé

132 cultivated populations (2x–16x) of 15 arctic-alpine species ofDraba were investigated to clarify a possible relationship between reproductive strategies and polyploid evolution in the genus. The populations were exclusively sexual and produced viable seed after spontaneous self-pollination, but showed large variation both in traits promoting cross-pollination and in autogamous fruit and seed set. Traits promoting cross-pollination, e.g., floral display, protogyny, and delayed selfing, were positively correlated, and these traits were negatively correlated with autogamous fruit and seed set. All diploid and many polyploid populations had high autogamous seed set and small, unscented, non-protogynous, and rapidly selfing flowers. In contrast, all populations with low autogamous seed set and large, scented, and strongly protogynous flowers with distinctly delayed selfing were polyploid. These results are consistent with those previously obtained from enzyme electrophoresis, suggesting that the genetically depauperate diploids are extreme inbreeders and that the highly fixed-heterozygous polyploids vary from extreme inbreeders to mixed maters. The reproductive data lend additional support to the hypothesis that allopolyploidy in arcticDraba serves as an escape from genetic depauperation caused by uniparental inbreeding at the diploid level.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - evolutionary biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - genetique des eucaryotes. evolution biologique et moleculaire
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Plant Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - plant sciences
  • 1 - science ; 2 - evolutionary biology
Identifiant ISTEX
6935A8BAFC531676C6C79300C1333580145A21A6
Revue

Plant Systematics and Evolution

Année de publication
1993
Présence de XML structuré
Non
Score qualité du texte
9.172
Version PDF
1.3
Type de publication
Journal
ark:/67375/1BB-0FVZMKF1-L
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