Correlation between Fitness and Genetic Diversity

Reed, David; Frankham, Richard

doi:10.1046/j.1523-1739.2003.01236.x

Cited by 1,995 publications

(1,610 citation statements)

References 69 publications

(43 reference statements)

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“…Genetic diversity and population size are generally correlated with population fitness [29]. Abundances of rock carp have dramatically declined since the 1970s [10].…”

Section: Discussionmentioning

confidence: 99%

Impacts of hatchery release on genetic structure of rock carp Procypris rabaudi in the upper Yangtze River, China

Cheng

Liu

et al. 2011

Fish Sci

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Rock carp Procypris rabaudi is a vulnerable endemic fish in the upper Yangtze River. Hatchery release has been carried out as a major stock enhancement strategy for this species. Ten microsatellite loci were chosen to compare genetic variation between one wild population and two hatchery groups to evaluate the potential impacts of hatchery release on the genetic structure of the wild population. Two different models indicated strong evidence of recent bottlenecks in all groups. The hatchery groups were lower in the mean number of alleles per locus, allelic richness, and allelic diversity compared with the wild population. The 80% membership coefficient indicated that 14% of the wild fish could be assigned as hybrids of wild and hatchery fish. Our results suggested that hatchery release will further reduce the natural genetic diversity in the wild population, change the genetic structure of the rock carp population, and may not benefit restoration of this vulnerable fish species.

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“…Genetic diversity and population size are generally correlated with population fitness [29]. Abundances of rock carp have dramatically declined since the 1970s [10].…”

Section: Discussionmentioning

confidence: 99%

Impacts of hatchery release on genetic structure of rock carp Procypris rabaudi in the upper Yangtze River, China

Cheng

Liu

et al. 2011

Fish Sci

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“…A fundamental aspect of management for species conservation should be preservation of genetic variation so that natural selection and other processes have the potential to respond to environmental change (Reed & Frankham 2003, Frankham 2005. The application of molecular techniques to examine levels of genetic variation may provide valuable information to aid in the genetic management of endangered populations for long-term resilience (e.g.…”

Section: Introductionmentioning

confidence: 99%

Microsatellite variation and rare alleles in a bottlenecked Hawaiian Islands endemic: implications for reintroductions

Reynolds

Pearce²,

Lavretsky³

et al. 2015

Endang. Species. Res.

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Conservation of genetic biodiversity in endangered wildlife populations is an important challenge to address since the loss of alleles and genetic drift may influence future adaptability. Reintroduction aims to re-establish species to restored or protected ecosystems; however, moving a subset of individuals may result in loss of gene variants during the managementinduced bottleneck (i.e. translocation). The endangered Laysan teal Anas laysanensis was once widespread across the Hawaiian archipelago, but became isolated on Laysan Island (415 ha) from the mid-1800s until 2004 when a translocation to Midway Atoll (596 ha) was undertaken to reduce extinction risks. We compared genetic diversity and quantified variation at microsatellite loci sampled from 230 individuals from the wild populations at Laysan (1999 to 2009) and Midway (2007 to 2010; n = 133 Laysan, n = 96 Midway birds). We identified polymorphic markers by screening nuclear microsatellites (N = 83). Low nuclear variation was detected, consistent with the species' insular isolation and historical bottleneck. Six of 83 microsatellites were polymorphic. We found limited but similar estimates of allelic richness (2.58 alleles per locus) and heterozygosity within populations. However, 2 rare alleles found in the Laysan source population were not present in Midway's reintroduced population, and a unique allele was discovered in an individual on Midway. Differentiation between island populations was low (F ST = 0.6%), but statistically significant. Our results indicate that genetic drift had little effect on offspring generations 3 to 6 yr postrelease and demonstrate the utility of using known founder events to help quantify genetic capture during translocations and to inform management decisions.

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“…Munwes et al 2010). According to the theoretical predictions, less genetically diverse populations are often characterised by lower viability (Frankham 2003;Reed and Frankham 2003;Aguilar et al 2008) and/or adaptability (Young et al 1996, Willi et al 2006. However, the risk of negative consequences of fragmentation is related primarily to the dispersal capability (Thomas 2000).…”

Section: Introductionmentioning

confidence: 99%

Population at the edge: increased divergence but not inbreeding towards northern range limit in Acer campestre

Chybicki

Waldon‐Rudzionek

Meyza

2014

Tree Genetics & Genomes

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Ecological conditions shape natural distribution of plants. Populations are denser in optimal habitats but become more fragmented in the areas of suboptimal environmental conditions. Usually, fragmentation increases towards the limits of species distribution. Fragmented populations are often characterised by decreased genetic variation, and this effect is frequent in peripheral populations, mostly due to the reduced effective population size. Interestingly, the genetic consequences of fragmentation seem to be relatively weak in forest trees. Using microsatellite markers, we assessed the impact of population fragmentation on the genetic structure of a European tree species Acer campestre. Within the study area, this medium-size wind-dispersed and insect-pollinated tree reveals a gradual decrease in population density towards the northern range limit. Over the distance of 150 km, we detected the significant decrease in allelic richness, heterozygosity as well as an increase in the rate of population divergence along with latitude. On the other hand, we failed to show that the observed patterns of genetic structure result from the variation in population densities. Moreover, inbreeding levels revealed no association with both density and geographic location, suggesting that pollen limitation does not occur, even at the range margin. As we showed that there is no difference in a dispersal scale between low-and highdensity populations in the study species, we argue that the genetic structure is a result of postglacial recolonization. However, unlike many other forest trees, A. campestre showed the sharp latitudinal genetic pattern at a very restricted spatial scale. Limited dispersal and high fragmentation are likely the reasons.

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Correlation between Fitness and Genetic Diversity

Cited by 1,995 publications

References 69 publications

Impacts of hatchery release on genetic structure of rock carp Procypris rabaudi in the upper Yangtze River, China

Impacts of hatchery release on genetic structure of rock carp Procypris rabaudi in the upper Yangtze River, China

Microsatellite variation and rare alleles in a bottlenecked Hawaiian Islands endemic: implications for reintroductions

Population at the edge: increased divergence but not inbreeding towards northern range limit in Acer campestre

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