seed selection of gift tilapia ( oreochromis niloticus ) in the mekong delta area
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Seed selection of GIFT Tilapia ( Oreochromis niloticus ) in the Mekong Delta area. Southern Branch of the National Freshwater Fisheries Seed Center Research Institute of Aquaculture II. Origin of GIFT Tilapia. - PowerPoint PPT PresentationTRANSCRIPT
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Seed selection of GIFT Tilapia (Oreochromis niloticus) in the Mekong Delta area
Southern Branch of the National Freshwater Fisheries Seed Center
Research Institute of Aquaculture II
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Origin of GIFT Tilapia
Originated from the seed selection program for 8 strains of Tilapia from different geographical areas:
- 4 strains from Africa: Egypt, Kenya, Ghana, Senegal
- 1 strain farmed in Isael- 3 strains farmed in Asia: Thailand,
Taiwan, Singapore
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Development planning for Tilapia, period 2006 - 2015
View points and orientations: - Effective use of water surface (fresh,
marine and brackish)- Domestic consumption and international
export: aimed at domestic consumption and explored markets for export (30%)
- Contribution to commodity diversification- Effective commodity production- Socializing development
(Source: Bach Thi Tuyet)
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Development planning for Tilapia, period 2006 - 2015
View points and orientations:
- Combination with extension and intensive farming:- Extension to the converted and coastal areas- Extension of the marine and brackish water areas for
the period 2010 – 2015- Focus on semi-intensive farming (10 – 12 tons/ha),
development of intensive farming (20 – 25 tons/ha)
- Seeds- Mixed and monosex- Reduce and not to use hormone- High quality seeds
(Source: Bach Thi Tuyet)
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Development planning for Tilapia, period 2006 - 2015
Objectives:
- Production: 300,000 – 350,000 tons (in 2015)
- Area: 59,150ha of farming areas- Export: 30% with value of 100 mill. USD- Domestic consumption value: 5,000
billion VND
(Source: Bach Thi Tuyet)
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Nile Tilapia O. niloticus A popular farmed specie The first seed selection program
of GIFT Tilapia in the Mekong Delta Area
The selected character: growth rate
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1. Introduction
A cooperation program among: RIA II World Fish Center Wageningen
University
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2. Initial population 10th generation of
selected GIFT WorldFish Center,
Penang, Malaysia 1,200 individuals, 50
families Clear blood-line Marked and farmed
until maturation
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2. Initial population (cont.)
Harvest Measurement of
length, body weight, body height
Estimated breeding value (EBV)
Selection of 50 male fish and 100 female fish
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3. Family selection (BLUP method)
Family crossing with GIFT method 1 male fish 2 female fishes Production of 100 families
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3. Family selection (BLUP method)
Collection of eggs/fries Separate incubation and
nursing for every family
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3. Family selection (BLUP method)
Random selection of 40 individuals/family Marking and keep altogether
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4. Initial results Produced 100 familes
(50 couples of the same father with different mothers) in 2007 (GIFT of 11th generation)
Marked 40 individuals/family
Kept and farmed together
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Harvested in May 2008
Identification of ID for every individual
Measurement EBV of every
individual
4. Initial results (cont.)
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The selection effectiveness was estimated to be increased 12% as compared to the controlled individuals
Genetic coefficient (h2) 0.3
4. Initial results (cont.)
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Selection of broodstocks for 12th generation
Production and nursing of 12th generation families
4. Initial results (Cont.)
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Cooperation and development
Materials for dissemination:
High quality broodstocks obtained from:
- the remained quantity after family representatives have been sent to the selected populations for the next generation.
- the remained quantity after selecting the reserved fish for the next seed selection program.
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- Massive production of high quality reserved fish from the best families in order to create 2 different strains of blood-line.
- Strictly not to use the F1 generation of these strains as broodstocks due to high possibility of inbreeding.
- After a certain time of being used, the reserved fish will be replaced by a new ones from the the seed selection program of the Center. The new fishes have more advantages in some surveyed characters.
Cooperation and development (cont.)
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INITIAL PRODUCTION AND DISSEMINATION RESULTS IN 2008-2009
- 1 partner of large scale seed production
- Dissemination of 10,000 reserved broodstocks
- Production of 8 mill. high quality seeds
- Interest from clients
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Thank you very much!