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DNA HETEROZYGOSITY AND GROWTH RATE IN THE ATLANTIC COD GADUS MORHUA (L)
Author(s) -
Pogson Grant H.,
Fevolden Svein Erik
Publication year - 1998
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1998.tb03717.x
Subject(s) - biology , gadus , loss of heterozygosity , overdominance , atlantic cod , zoology , population , evolutionary biology , genetics , ecology , fishery , gene , allele , demography , sociology , fish <actinopterygii>
Relationships between growth rate and the degree of individual heterozygosity at ten nuclear RFLP loci were examined in two populations of the Atlantic cod, Gadus morhua , from northern Norway. A highly significant positive correlation was observed between growth rate and DNA heterozygosity in one population (Balsfjord) but not in the other (Barents Sea). Our results provide support for an important prediction of the associative overdominance hypothesis that heterozygosity‐fitness correlations can be detected at neutral genetic markers and suggest that environmental conditions might play a dominant role in the manifestation of the correlation.