NDLI: Genetic diversity in adult and seedling populations of Primula vulgaris in a fragmented agricultural landscape

Content Provider	Springer Nature Link
Author	Van Geert, Anja Van Rossum, Fabienne Triest, Ludwig
Copyright Year	2007
Abstract	Habitat fragmentation is known to generally reduce the size of plant populations and increase their isolation, leading to genetic erosion and increased between-population genetic differentiation. In Flanders (northern Belgium) Primula vulgaris is very rare and declining. Populations have incurred strong fragmentation for the last decades and are now restricted to a few highly fragmented areas in an intensively used agricultural landscape. Previous studies showed that small populations of this long-lived perennial herb still maintained high levels of genetic variation and low genetic differentiation. This pattern can either indicate recent gene flow or represent historical variation. Therefore, we used polymorphic microsatellite loci to investigate genetic variation and structure in adult (which may still reflect historical variation) and seedling (recent generation, thus affected by current processes) life stages. The recent generation (seedlings) showed a significant loss of observed heterozygosity (H o) together with lower expected heterozygosity (H e), a trend for higher inbreeding levels (F IS) and higher differentiation (F ST) between populations compared to the adult generation. This might result from (1) a reduction in effective population size, (2) higher inbreeding levels in the seedlings, (3) a higher survival of heterozygotes over time due to a higher fitness of heterozygotes (heterosis) and/or a lower fitness of homozygotes (inbreeding depression), (4) overlapping generations in the adult life stage, or (5) a lack of establishment of new (inbred) adults from seedlings due to degraded habitat conditions. Combining restoration of both habitat quality and gene flow between populations may be indispensable to ensure a sustainable conservation of fragmented populations.
Starting Page	845
Ending Page	853
Page Count	9
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	9
Issue Number	4
e-ISSN	15729737
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-08-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Genetic erosion Habitat fragmentation Inbreeding Long-lived perennial Microsatellites Evolutionary Biology Plant Sciences Animal Anatomy / Morphology / Histology Human Genetics
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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