title: Biochemical genetics of Fundulus heterolitus (L.). I. Temporal and spatial variation in gene frequencies of Ldh-B, Mdh-A, Gpi-B, and Pgm-A.
abstract: Natural populations of Fundulus heteroclitus show extensive spatial variation in gene frequencies at four unlinked polymorphic loci. Large clinal changes in gene frequencies were found for Ldh-B, Mdh-A, and Gpi-B, whereas the spatial variation for the Pgm-B locus was small. Since the geographical area over which these clines are found is characterized by a steep thermal gradient, the clines in gene frequency are correlated with a directional change in mean water temperature. Maximum gene diversity of these four loci was correlated with annual fluctuations in water temperature. Temporal stability of the allelic frequencies was established for a 2--4 year period.
mesh_terms: D000818:Animals; D005399:Fishes / Q000235:genetics*; D005787:Gene Frequency; D005956:Glucose-6-Phosphate Isomerase / Q000235:genetics*; D007695:Killifishes / Q000235:genetics*; D007770:L-Lactate Dehydrogenase / Q000235:genetics*; D008291:Malate Dehydrogenase / Q000235:genetics*; D010733:Phosphoglucomutase / Q000235:genetics*; D012623:Seawater; D013696:Temperature
chemical_list: D007770:L-Lactate Dehydrogenase; D008291:Malate Dehydrogenase; D005956:Glucose-6-Phosphate Isomerase; D010733:Phosphoglucomutase