Genetic analysis of enzyme polymorphisms in plaice (Pleuronectes platessa)

Purdom, C E; Thompson, D; Dando, P R. 1976 Genetic analysis of enzyme polymorphisms in plaice (Pleuronectes platessa). Heredity, 37 (2). 193-206. https://doi.org/10.1038/hdy.1976.82

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Official URL: http://dx.doi.org/10.1038/hdy.1976.82

Abstract/Summary

Genetic analysis was performed on five enzyme systems (G3PDH; GPI-A; GPI-B; PGM; MDH-A) in plaice (Pleuronectes platessa) collected in spawning condition from the North Sea. Conventional crosses, induced gynogenesis and induced triploidy were performed. The data conclusively demonstrated the inheritance of isozymes by co-dominant alleles at individual loci for each system. No linkage was observed but tests did not include MDH nor the possibility of linkage between G3PDH and GPI-A. Some anomalous segregation ratios were observed, particularly a deficiency of heterozygotes for GPI-A, but the data were largely in conformity with Mendelian expectations. At the PGM locus, five independent anomalous individuals were scored and interpreted as mutations with a mutation rate of 1·1 × 10−3 per gamete. Recombination with the centromere was assessed and induced triploidy and cross-over values of 41 per cent for PGM, 19 per cent for MDH-A and 9 per cent for GPI-B were derived on the assumption of complete interference. Amongst the parent fish, genotypic and phenotypic frequencies were largely consistent with the expectations of the Hardy-Weinberg Law, and allelic frequencies were not significantly different between year of collection or location of collection ground.

Item Type: Publication - Article
Subjects: Aquaculture
Fisheries
Marine Sciences
Zoology
Divisions: Marine Biological Association of the UK > Other (MBA)
Depositing User: Professor Paul Dando
Date made live: 06 Jan 2022 12:48
Last Modified: 06 Jan 2022 12:48
URI: http://plymsea.ac.uk/id/eprint/9498

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