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- Title
A genetic linkage map of a cichlid fish, the tilapia (Oreochromis niloticus).
- Authors
Kocher, T D; Lee, W J; Sobolewska, H; Penman, D; McAndrew, B
- Abstract
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 approximately 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.
- Publication
Genetics, 1998, Vol 148, Issue 3, p1225
- ISSN
0016-6731
- Publication type
Journal Article
- DOI
10.1093/genetics/148.3.1225