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A genetic linkage map of a cichlid fish, the tilapia (Oreochromis niloticus)

Kocher TD, Lee W, Sobolewska H, Penman D & McAndrew B (1998) A genetic linkage map of a cichlid fish, the tilapia (Oreochromis niloticus), Genetics, 148 (3), pp. 1225-1232.

We have constructed a genetic map for a tilapia, Oreochromis niloticus, using DNA markers. The segregation of 62 microsatellite and 112 anonymous fragment length polymorphisms (AFLPs) was studied in 41 haploid embryos derived from a single female. We have identified linkages among 162 (93.1%) of these markers. 95% of the microsatellites and 92% of the AFLPs were linked in the final map. The map spans 704 Kosambi cM in 30 linkage groups covering the 22 chromosomes of this species. Twenty-four of these linkage groups contain at least one microsatellite polymorphism. From the number of markers 15 or fewer cM apart, we estimate a total map length of ~1000-1200 cM. High levels of interference are observed, consistent with measurements in other fish species. This map is a starting point for the mapping of single loci and quantitative traits in cichlid fishes.

Subject headings
Cichlids; Aquaculture

AuthorsKocher Thomas D, Lee Woo-Jai, Sobolewska Halina, Penman David, McAndrew Brendan
Publication date03/1998
PublisherGenetics Society of America
ISSN 0016-6731

Genetics: Volume 148, Issue 3 (MAR 1998)

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