Open AccessDEVELOPMENT OF A COLD‐TOLERANT POPULATION OF RED TILAPIA THROUGH INTROGRESSIVE HYBRIDIZATION
Author(s) -
Behrends L. L.,
Smitherman R. O.
Publication year - 1984
Publication title -
journal of the world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0735-0147
DOI - 10.1111/j.1749-7345.1984.tb00150.x
Subject(s) - backcrossing , biology , introgression , population , tilapia , hybrid , botany , zoology , fish <actinopterygii> , genetics , gene , fishery , demography , sociology
A population of red tilapia with cold tolerance traits similar to Tilapia aurea has been produced using introgressive breeding techniques, i.e., hybridization (female T. aurea x male red tilapia, heterozyqous for red trait) followed by backcrossing (female T. aurea x F‐1 male, red phenotype). Progeny of the F‐1 backcross, consisting of approximately 50% normal and 50% red phenotype, survived longer under conditions of ambient cooling than either T. aurea or T. mossambica (P < 0.05). There were no differences in cold tolerance between the normal and red phenotypes of the F‐1 backcross population (P > 0.05). Mean lower lethal temperatures for the three groups were: T. aurea (11.6 °C), T. mossambica (13.8 °C), and F‐1 backcross, red and normal phenotypes pooled, 10.0 °C.