Genetic variability in four hatchery strains of coho salmon, Oncorhynchus kisutch (Walbaum), in Chile
Artículo

Open/ Download
Access note
Acceso a solo metadatos
Publication date
2001Metadata
Show full item record
Cómo citar
Pérez, L. A.
Cómo citar
Genetic variability in four hatchery strains of coho salmon, Oncorhynchus kisutch (Walbaum), in Chile
Author
Abstract
Coho salmon. Oncorhynchus kisutch (Walbaum). is intensively cultured in Chile. An increasing proportion of the eggs necessary to sustain the culture are locally produced by some hatcheries. However, there is no information about the origin or the genetic variability in these strains. The present study analysed allozymic variability and its distribution within and between some commercial strains of coho salmon in southern Chile. The genetic variability was estimated using horizontal starch gel electrophoresis. Samples of coho salmon were obtained randomly from four Chilean hatcheries. Twenty-five enzymatic systems were examined, representing 51 enzymatic loci. Eight loci showed variability in at least one strain, which represented a total polymorphism (P) of 15.7%. Only the PGM-1* locus was variable in all strains. The remaining loci were fixed in at least one strain. Total heterozygosity (HT) and within population heterozygosity (HS) were 0.35% and 0.36% respectively. The index of genetic diversity (GST) was 1.5%. The results confirm previous reports of low genetic variability in cultured strains of coho salmon in Chile. below that observed in their native range, which suggests loss of the genetic variability caused by genetic drift or other causes in these strains
Indexation
Artículo de publicación SCOPUS
Identifier
URI: https://repositorio.uchile.cl/handle/2250/157227
DOI: 10.1046/j.1365-2109.2001.00525.x
ISSN: 1355557X
Quote Item
Aquaculture Research, Volumen 32, Issue 1, 2001, Pages 41-46
Collections