How much do we know and how much do we care about genetic diversity of threatened plants ? A case study from the French flora. Issue 1 (2nd January 2023)

• Record Type: Journal Article
• Authors: Ducrettet, Juliette; Maurice, Sandrine; Imbert, Eric
• Is Part Of: Botany letters. Volume 170:Issue 1(2023)
• Page Start: 110
• Page End: 118
• Publication Date: 2023-01-02
• Subjects: Genetic diversity -- conservation -- threatened plants -- management -- metropolitan France; Botany -- Periodicals; Botany; Botany; Electronic journals; Periodicals; Periodical; 580
• DOI: 10.1080/23818107.2022.2125902
• Languages: English
• ISSNs: 2381-8107

Abstract

ABSTRACT: 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.