Genotype by production environment interaction in the GIFT strain of Nile tilapia (Oreochromis niloticus)

H.L. Khaw, R.W. Ponzonia, A. Hamzah, K.R. Abu-Bakara, P. Bijma

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

Three discrete generations of GIFT fish (Nile tilapia strain, Oreochromis niloticus; a total of 10,065 fish with pedigree and phenotypic information) were tested in pond and cage culture environments to determine genotype by production environment interaction between both environments in Malaysia. Live weight (selected trait), standard length, body depth and width were recorded. A bivariate animal model was used to estimate variance and covariance components, whereby the homologous body traits in pond and cage environments were treated as genetically distinct traits. The heritabilities estimated for these body traits ranged from 0.19 to 0.40 in the pond environment, and from 0.23 to 0.34 in the cage environment. Across all traits the maternal common environmental effects ranged from 0.14 to 0.26 and were greater for the pond than for the cage environment. The genetic correlations between the pond and cage environments were 0.73 ± 0.09 for live weight, 0.81 ± 0.09 for standard length, 0.78 ± 0.10 for body depth, and 0.85 ± 0.13 for body width. Coupled with the total selection responses for live weight after two generations of selection, being 35% for the pond environment and 45% for the cage environment, we concluded that genotype by environment interaction for GIFT strain between pond and cage environments was not important. Hence, it would not be necessary to have two separate selective breeding programs for the GIFT strain in Malaysia. --------------------------------------------------------------------------------
Original languageEnglish
Pages (from-to)53-60
JournalAquaculture
Volume326-329
DOIs
Publication statusPublished - 2012

Fingerprint

Oreochromis niloticus
genotype
cages
pond
Malaysia
body weight
cage culture
pond culture
selective breeding
selection response
heritability
selection methods
fish
environmental effect
pedigree
body length
genetic correlation
animal models
animal

Keywords

  • trout oncorhynchus-mykiss
  • genetic-parameters
  • body-weight
  • rainbow-trout
  • common carp
  • breed improvement
  • sexual-dimorphism
  • european races
  • growth traits
  • selection

Cite this

Khaw, H.L. ; Ponzonia, R.W. ; Hamzah, A. ; Abu-Bakara, K.R. ; Bijma, P. / Genotype by production environment interaction in the GIFT strain of Nile tilapia (Oreochromis niloticus). In: Aquaculture. 2012 ; Vol. 326-329. pp. 53-60.
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Genotype by production environment interaction in the GIFT strain of Nile tilapia (Oreochromis niloticus). / Khaw, H.L.; Ponzonia, R.W.; Hamzah, A.; Abu-Bakara, K.R.; Bijma, P.

In: Aquaculture, Vol. 326-329, 2012, p. 53-60.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Genotype by production environment interaction in the GIFT strain of Nile tilapia (Oreochromis niloticus)

AU - Khaw, H.L.

AU - Ponzonia, R.W.

AU - Hamzah, A.

AU - Abu-Bakara, K.R.

AU - Bijma, P.

PY - 2012

Y1 - 2012

N2 - Three discrete generations of GIFT fish (Nile tilapia strain, Oreochromis niloticus; a total of 10,065 fish with pedigree and phenotypic information) were tested in pond and cage culture environments to determine genotype by production environment interaction between both environments in Malaysia. Live weight (selected trait), standard length, body depth and width were recorded. A bivariate animal model was used to estimate variance and covariance components, whereby the homologous body traits in pond and cage environments were treated as genetically distinct traits. The heritabilities estimated for these body traits ranged from 0.19 to 0.40 in the pond environment, and from 0.23 to 0.34 in the cage environment. Across all traits the maternal common environmental effects ranged from 0.14 to 0.26 and were greater for the pond than for the cage environment. The genetic correlations between the pond and cage environments were 0.73 ± 0.09 for live weight, 0.81 ± 0.09 for standard length, 0.78 ± 0.10 for body depth, and 0.85 ± 0.13 for body width. Coupled with the total selection responses for live weight after two generations of selection, being 35% for the pond environment and 45% for the cage environment, we concluded that genotype by environment interaction for GIFT strain between pond and cage environments was not important. Hence, it would not be necessary to have two separate selective breeding programs for the GIFT strain in Malaysia. --------------------------------------------------------------------------------

AB - Three discrete generations of GIFT fish (Nile tilapia strain, Oreochromis niloticus; a total of 10,065 fish with pedigree and phenotypic information) were tested in pond and cage culture environments to determine genotype by production environment interaction between both environments in Malaysia. Live weight (selected trait), standard length, body depth and width were recorded. A bivariate animal model was used to estimate variance and covariance components, whereby the homologous body traits in pond and cage environments were treated as genetically distinct traits. The heritabilities estimated for these body traits ranged from 0.19 to 0.40 in the pond environment, and from 0.23 to 0.34 in the cage environment. Across all traits the maternal common environmental effects ranged from 0.14 to 0.26 and were greater for the pond than for the cage environment. The genetic correlations between the pond and cage environments were 0.73 ± 0.09 for live weight, 0.81 ± 0.09 for standard length, 0.78 ± 0.10 for body depth, and 0.85 ± 0.13 for body width. Coupled with the total selection responses for live weight after two generations of selection, being 35% for the pond environment and 45% for the cage environment, we concluded that genotype by environment interaction for GIFT strain between pond and cage environments was not important. Hence, it would not be necessary to have two separate selective breeding programs for the GIFT strain in Malaysia. --------------------------------------------------------------------------------

KW - trout oncorhynchus-mykiss

KW - genetic-parameters

KW - body-weight

KW - rainbow-trout

KW - common carp

KW - breed improvement

KW - sexual-dimorphism

KW - european races

KW - growth traits

KW - selection

U2 - 10.1016/j.aquaculture.2011.11.016

DO - 10.1016/j.aquaculture.2011.11.016

M3 - Article

VL - 326-329

SP - 53

EP - 60

JO - Aquaculture

JF - Aquaculture

SN - 0044-8486

ER -