Conservation genetics of two island endemic Ribes spp. (Grossulariaceae) of Sardinia: survival or extinction?

Plant Biology
R GentiliG Bacchetta

Abstract

Measuring levels of population genetic diversity is an important step for assessing the conservation status of rare or endangered plant species and implementing appropriate conservation strategies. Populations of Ribes multiflorum subsp. sandalioticum and R. sardoum, two endangered endemic species from Sardinia, representing the whole genus on the island, were investigated using ISSR and SSR markers to determine levels and structure of genetic variability in their natural populations. Results indicated medium to low genetic diversity at the population level: Nei's gene diversity for ISSR markers ranged from 0.0840 to 0.1316; the expected heterozygosity (HE ) for SSR ranged from 0.4281 to 0.7012. In addition, only one remnant population of R. sardoum showed a high level of inbreeding, in accordance with its very small size. Regarding the structure of the six R. sandalioticum populations, both principal coordinates analysis (PCoA) and STRUCTURE analysis of ISSR and SSR data highlighted low population structure, although two populations appeared to be clearly distinct from the others. The genetic pattern of the two taxa associated with their different ecological positions indicated resilience of R. sandalioticum populations in fre...Continue Reading

References

Dec 1, 1973·Proceedings of the National Academy of Sciences of the United States of America·M Nei
Sep 1, 1994·Computer Applications in the Biosciences : CABIOS·Y Van de Peer, R De Wachter
May 23, 2000·Nature·F S ChapinS Díaz
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Sep 12, 2008·Molecular Ecology Notes·Daniel FalushJonathan K Pritchard
Nov 26, 2009·Genome Génome / Conseil National De Recherches Canada·M CavannaG Bounous

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