Establishment of satellite nucleus of genetically improvedfarmed tilapia (GIFT strain) in Bangladesh
2008
The aim of this study was to evaluate growth performance of the GIFT (Genetically
Improved Farmed Tilapia) strain after one generation of selection for increased body
weight at Bangladesh Fisheries Research Institute. Founder stock comprised of 30
families having 300 individuals of the GIFT strain were introduced from Malaysia
through \X!orldFish Center in March 2005. The founder stock was reared in 100 m2
hapa for three months and then individually tagged using Passive Integrated
Transponder (PIT) at the weight between 30 and 40 g. After tagging, all the fish were
communally grown out in pond until harvest. Breeding value for body weight was
estimated using SAS and ASREML ranging from 4.17 to 9.70 g for males and 4.24 to
9.36 g for females. The best 40 females and 40 males from the founder stock were then
selected to produce progeny of the first generation (F-1). From each family 25 female
and 25 male fingerlings were sampled and tagged using PIT. A total of 2,000 tagged
fish from 40 families were stocked in a pond (1000 m2) for a continuation of the
selection program. In addition, surplus fish after tagging were also reared together with
progeny of the founder stock in cistern ecology for growth evaluation. The mean weight
of the F-1 generation of GIFT fish was 7.2% greater than that of the founder
population (non selected population).
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