Abstract
Sera from Israeli stocks of T. nilotica, T. vulcani and T. aurea were analysed, by polyacrylamide gel electrophoresis, for the existence of species-specific markers. Markers situated in the fast region of the electropherogram were found to be male sex and species specific. Interspecies polymorphism in markers in the post albumin area (transferrins) permit the distinction between these related species of Tilapia. No significant polymorphism was found in the electropherogram of T. vulcani. T. aurea presented some slight variations in the transferrin zone, and T. nilotica displayed a high polymorphism everywhere along the electropherogram. Two other species specific bands were found in the prealbumin zone; bands 1 (specific for T. aurea) and 2 (specific for T. vulcani). A selection of fish stocks of T. aurea and T. vulcani is currently done now on the basis of this electrophoretic criteria and on the ability to produce a high percentage of male hybrids. It was concluded that the stock of T. nilotica which exist in Israel do not represent the pure species of T. nilotica. The failure to obtain 100% males in all paired interspecific mating (Pruginin et al., 1975) was explained on this basis.
| Original language | English |
|---|---|
| Pages (from-to) | 255-265 |
| Number of pages | 11 |
| Journal | Aquaculture |
| Volume | 7 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1976 |
Bibliographical note
Funding Information:We are indebted to Professor R. Moav (Hebrew University, Jerusalem) and to Professor K. Stern (Bar-Ran University, Ramat-Gan) for their advice, and to U. Yoran for the excellent photography. This work was supported by Grant No. 1386 from the National Council for Research and Development, Israel, and by a grant from the Fish Breeder association in Israel.
Funding
We are indebted to Professor R. Moav (Hebrew University, Jerusalem) and to Professor K. Stern (Bar-Ran University, Ramat-Gan) for their advice, and to U. Yoran for the excellent photography. This work was supported by Grant No. 1386 from the National Council for Research and Development, Israel, and by a grant from the Fish Breeder association in Israel.
| Funders | Funder number |
|---|---|
| Fish Breeder association in Israel | |
| National Council for Research and Development, Israel |