La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Life on the edge - High levels of genetic diversity in a cliff population of Bertya ingramii are attributed to B-rosmarinifolia (Euphorbiaceae)
Auteurs :	Mo Fatemi, Auteur ; C. L. Gross, Auteur
Type de document :	Article
Dans :	Biological Conservation (142(7) JUL 2009)
Article en page(s) :	1461-1468
Langues:	Anglais
Résumé :	Wind-facilitated migration of new genotypes into small, geographically disjunct populations should buffer them against local extinction. Bertya ingramii, a monoecious, wind-pollinated shrub, is restricted to three populations in a 4 km(2) area in eastern Australia. Populations are separated by deeply dissected gorges where it is unlikely that seeds are exchanged but where wind movement may facilitate pollen dispersal. Using 156 highly polymorphic ISSR markers, we found moderate genetic variation within and among populations of B. ingramii and less genetic diversity in a nearby and small population of the widespread Bertya rosmarinifolia. The smallest population of B. ingramii (

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