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CYTOCHROME C OXIDASE ACTIVITY IN INTERPOPULATION HYBRIDS OF A MARINE COPEPOD: A TEST FOR NUCLEAR‐NUCLEAR OR NUCLEAR‐CYTOPLASMIC COADAPTATION
Author(s) -
Edmands Suzanne,
Burton Ronald S.
Publication year - 1999
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.1558-5646.1999.tb04578.x
Subject(s) - biology , nuclear gene , copepod , cytochrome c oxidase , mitochondrial dna , gene , genetics , mitochondrion , extranuclear inheritance , evolutionary biology , zoology , crustacean
The respiratory enzyme cytochrome c oxidase (COX) is composed of subunits encoded by both nuclear and mitochondrial genes; thus, COX activity reflects, to some extent, the coordinated function of the two genomes. Because extensive mtDNA differentiation exists between populations of the copepod Tigriopus californicus , we hypothesized that laboratory hybridizations that disrupt natural combinations of nuclear and mitochondrial genes might negatively impact COX activity. Although experimental results varied greatly among different crosses, replicate sets of crosses between two particular populations showed consistent evidence for nuclear‐cytoplasmic coadaptation.