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Growth rate correlates to individual heterozygosity in the European eel, Anguilla anguilla L. Pujolar, J.M.; Maes, G.E.; Vancoillie, C.; Volckaert, F.A.M.J. (2005). Growth rate correlates to individual heterozygosity in the European eel, Anguilla anguilla L. Evolution 59(1): 189-199. https://dx.doi.org/10.1554/04-377 In: Evolution. Society for the Study of Evolution: Lancaster. ISSN 0014-3820; e-ISSN 1558-5646 Is gerelateerd aan: Pujolar, J.M.; Maes, G.E.; Vancoillie, C.; Volckaert, F.A.M.J. (2005). Growth rate correlates to individual heterozygosity in the European eel, Anguilla anguilla L., in: Maes, G.E. Evolutionary consequences of a catadromous life-strategy on the genetic structure of European eel (Anguilla anguilla L.). pp. 161-179, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 98762 [ download pdf ]

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Trefwoorden

Disciplines > Biology > Genetics > Heterozygosity Enzymes > Allozymes Growth rate Microsatellites Nucleic compounds > Nucleic acids > Dna > Satellite dna > Microsatellites Selection Selection Marien/Kust

Author keywords

allozymes; associative overdominance; direct overdominance; growth rate;heterozygosity; microsatellites; selection

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Auteurs		Top
Pujolar, J.M. Maes, G.E. Vancoillie, C. Volckaert, F.A.M.J.

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Abstract

Heterozygosity-fitness correlations (HFCs) have been reported in populations of many species. We provide evidence for a positive correlation between genetic variability and growth rate at 12 allozyme loci in a catadromous marine fish species, the European eel (Anguilla anguilla L.). More heterozygous individuals show a significantly higher length and weight increase and an above average condition index in comparison with more homozygous individuals. To a lesser extent, six microsatellite loci show a similar pattern, with positive but not significant correlations between heterozygosity and growth rate. The HFCs observed could be explained by an effect of either direct allozyme over-dominance or associative overdominance. Selection affecting some of the allozyme loci would explain the greater strength of the HFCs found at allozymes in comparison with microsatellites and the lack of correlation between MLH at allozymes and MLH at microsatellites. Associative overdominance (where allozyme loci are merely acting as neutral markers of closely linked fitness loci) might provide an explanation for the HFCs if we consider that allozyme loci have a higher chance than microsatellites to be in linkage disequilibrium with fitness loci.

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