2020
DOI: 10.1111/cobi.13617
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Meta‐analysis of genetic representativeness of plant populations under ex situ conservation in contrast to wild source populations

Abstract: Ex situ conservation is widely used to protect wild plant species from extinction. However, it remains unclear how genetic variation of ex situ plant collections reflects diversity of wild source populations. We conducted a global meta‐analysis of the genetic representativeness of ex situ populations by comparing genetic diversity (i.e., AR, allelic richness; He, expected heterozygosity; PPB, percent polymorphic bands; and SWI, Shannon–Winner index), inbreeding coefficient (FIS), and genetic differentiation be… Show more

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Cited by 43 publications
(32 citation statements)
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“…Genetic data can provide crucial knowledge on how landscape structure impedes or supports gene flow and genetic diversity and informs large landscape planning. Finally, for many species, ex situ collections in seed banks, zoos, and botanic gardens help forestall the loss of genetic diversity and sometimes conserve genetic variation no longer extant in the wild, although most are currently not sufficiently large, representative, or replicated (Khoury et al 2019 , Hoban et al 2020b, Wei and Jiang 2021 ). Genetic data collected before and after any of these actions can determine whether they have succeeded (also see the “Looking ahead: Challenges” section below).…”
Section: Second Set Of Conditions: Monitoring Toolsmentioning
confidence: 99%
“…Genetic data can provide crucial knowledge on how landscape structure impedes or supports gene flow and genetic diversity and informs large landscape planning. Finally, for many species, ex situ collections in seed banks, zoos, and botanic gardens help forestall the loss of genetic diversity and sometimes conserve genetic variation no longer extant in the wild, although most are currently not sufficiently large, representative, or replicated (Khoury et al 2019 , Hoban et al 2020b, Wei and Jiang 2021 ). Genetic data collected before and after any of these actions can determine whether they have succeeded (also see the “Looking ahead: Challenges” section below).…”
Section: Second Set Of Conditions: Monitoring Toolsmentioning
confidence: 99%
“…Besides, in the overall SNP set (Figure S 7), there was no significant effect of habitat type on genetic diversity, which indicates that genetic diversity of an overall SNP set represents rather neutral genetic patterns (Dauphin et al, 2020). In conservation genetics and restoration, most assessments have been based on overall or neutral genetic diversity so far (González et al, 2019; Wei & Jiang, 2020), even though it is most likely the putatively adaptive regions of a genome that are important for the fate of a population in a changed environment.…”
Section: Discussionmentioning
confidence: 99%
“…The only existing studies that explicitly account for a difference in neutral and adaptive loci in plants concentrated on climatic factors (Dauphin et al, 2020; Sun et al, 2020). Moreover, in conservation genetics, most studies focussed on overall or genetic diversity at neutral loci so far, often using a set of neutral microsatellite markers, while ignoring adaptive regions of the genome (González et al, 2019; Wei & Jiang, 2020). However, it is exactly the adaptive regions that are important for the fate of a population.…”
Section: Introductionmentioning
confidence: 99%
“…Genomic techniques allow us to detect DNA sequence variation at single nucleotides (i.e. single-nucleotide polymorphism: SNP, see glossary) that can be used to evaluate the effects of historic founder selection (Gomes Viana et al 2018;Frandsen et al 2020;Ogden et al 2020;Wei and Jiang 2021) and set guidance on how to increase levels of genetic diversity and minimise genetic similarity (Bragg et al 2020) via selective addition of unrepresented lines (Wildt et al 2019;Galla et al 2020;Miller et al 2010). The efficiency of ex situ management partly relies on the profound knowledge of a species' taxonomic status and recent demographic history.…”
Section: Defining Ex Situ Populations and Their Relationship To In Situ Populations Using Genomicsmentioning
confidence: 99%