How much do we know and how much do we care about genetic diversity of threatened plants? A case study from the French flora - Université de Montpellier
Article Dans Une Revue Botany Letters Année : 2022

How much do we know and how much do we care about genetic diversity of threatened plants? A case study from the French flora

État des lieux de la connaissance et de la prise en compte de la diversité génétique des espèces rares et menacées de la Flore de France Métropolitaine

Résumé

Small demographic size and reduced genetic diversity increase the extinction probability of a population. Genetic diversity within populations for neutral markers is an heuristic parameter, as it reflects past and ongoing processes acting on populations, and informs on possible futures. This study presents a synthesis of the knowledge on neutral genetic diversity for threatened plants in metropolitan France and the use of such data in management actions. Pairing threatened species with the closest non-threatened species for which we could find appropriate genetic data, we collected information on genetic diversity for 25 threatened species and non-threatened controls. We found that threatened species in France have on average a lower within-population genetic diversity than non-threatened controls and thus are exposed to risks linked to genetic erosion. Combining an analysis of recovery plans and a survey addressed to practitioners, we concluded that genetic diversity is rarely integrated in management actions. The integration of such information into applied conservation remains a challenge. We provide some guidelines to collect biological traits impacting within-population genetic diversity and some specific recommendations for a better incorporation of population genetics concepts into conservations actions.
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hal-03786687 , version 1 (23-09-2022)

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Juliette Ducrettet, Sandrine Maurice, Eric Imbert. How much do we know and how much do we care about genetic diversity of threatened plants? A case study from the French flora. Botany Letters, In press, 170 (1), pp.110-118. ⟨10.1080/23818107.2022.2125902⟩. ⟨hal-03786687⟩
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