Electrophoretic polymorphism and sexual dimorphism in the freshwater and anadromous threespine sticklebacks (Gasterosteus aculeatus) of the Little Campbell River, British Columbia
✍ Scribed by R. E. Withler; J. D. McPhail; R. H. Devlin
- Book ID
- 104787438
- Publisher
- Springer
- Year
- 1986
- Tongue
- English
- Weight
- 679 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0006-2928
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✦ Synopsis
We used single-family crosses to confirm the Mendelian interpretation of allozyme variation and to examine linkage relationships at five polymorphic loci in freshwater and anadromous threespine sticklebacks (Gasterosteus aculeatus) from the Little Campbell River, British Columbia. The electrophoretie pattern of a sixth locus, mitochondrial NADP-dependent isocitrate dehydrogenase (IDH), was found to be sexually dimorphic but otherwise invariant in sticklebacks. This raised the possibility of a sex-linked Idh locus. No differences in IDH quantity or substrate affinities (apparent Km values) were detected between male and female sticklebacks. The electrophoretie pattern of IDH expression was not changed in sticklebacks in which sexual development was altered by hormonal treatment.