genetic selection programs in shellfish and shrimp species
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Genetic Selection Programs in Shellfish and Shrimp Species. Ana Catarina Silva n º 29817 Joana Marquesnº29824 Paulo Mira Fernandes n º 29830 . Why Genetic selection is a important tool for Aquaculture?. Growth improvement Disease resistance Survival rate . Introduction. - PowerPoint PPT PresentationTRANSCRIPT
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Genetic Selection Programs in Shellfish and
Shrimp SpeciesAna Catarina Silva nº 29817
Joana Marques nº29824
Paulo Mira Fernandes nº 29830
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Why Genetic selection is a important tool for Aquaculture?
Growth improvement
Disease resistance
Survival rate
Breeding Programs
Intro
duct
ion
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Shrimp
Grow
th Im
prov
emen
t
Argue et al. 2002 Litopenaeus vannamei
Randomly selected fast-growers
Growth Disease Resistance
Li et al. 2006 and Moss et al. 2007
Fenneropenaaeus chinensis and Litopenaeus vannamei
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Shrimp
Dise
ase
resis
tanc
eLi et al. 2006 Fenneropenaeus chinensisMass selection
Selected for Taura Syndrome Virus (one gene resistance)
Lacks selection for polygenic resistance to other viruses (WSSV)
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Oysters
Grow
th Im
prov
emen
t
VIMS, 2010 Crassostrea virginica
Kinsale LynnhavenYork
Over time, triploid individuals presented a higher growth rate
Environmental conditions?
Growth energy budget?
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Oysters
Dise
ase
Resis
tanc
eVIMS, 2010 Crassostrea virginica
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Oysters
Surv
ival
Rat
e
Kinsale LynnhavenYork
VIMS, 2010 Crassostrea virginica
Over time, triploid individuals presented a higher survival rate
Higher tolerance to salinity?
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Clams
Grow
th Im
prov
emen
t
El-Wazzan and Scarpa, 2009 Mercenaria mercenaria notata
Triploid species may be considered almost sterile.
Can tripoidy be an advantage to the improvement of growth?
14 and 15-18 weeks old clams
Triploid individuals grew less than diploid.
But,
Under stressful conditions triploid clams may present better growth rates.
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Clams
Grow
th Im
prov
emen
t
El-Wazzan and Scarpa, 2009