Genetic parameters for survival during the grow-out period in the GIFT strain of Nile tilapia (Oreochromis niloticus) and correlated response to selection for harvest weight

被引：9

作者：

Hamzah, Azhar ^{[1
,2
]}

Mekkawy, Wagdy ^{[3
,4
]}

Hooi Ling Khaw ^{[3
]}

Nguyen Hong Nguyen ^{[5
]}

Yee, Hoong Yip ^{[3
]}

Abu Bakar, Khairul Rizal ^{[3
]}

Nor, Siti Azizah Mohd ^{[1
]}

Ponzoni, Raul W. ^{[6
]}

机构：

[1] Univ Sci Malaysia, Sch Biol Sci, Minden, Penang, Malaysia

[2] Natl Prawn Fry Prod & Res Ctr, Kota Kuala Muda, Kedah, Malaysia

[3] World Fish, Jalan Batu Maung, George Town 11960, Malaysia

[4] Ain Shams Univ, Dept Anim Prod, Fac Agr, Cairo, Egypt

[5] Univ Sunshine Coast, Sch Sci Educ & Engn, Maroochydore, Qld, Australia

[6] Univ Republica, Dept Anim Prod, Fac Agron, Montevideo, Uruguay

来源：

AQUACULTURE RESEARCH | 2017年 / 48卷 / 01期

关键词：

survival; GIFT; heritability; genetic correlation; selection response; RAINBOW-TROUT SURVIVAL; BODY-WEIGHT; CRASSOSTREA-GIGAS; PACIFIC OYSTER; ATLANTIC SALMON; EARLY-LIFE; HERITABILITY; IMPROVEMENT; HATCHERY; SIZE;

D O I：

10.1111/are.12859

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The aims of this study were the estimation of genetic parameters for survival rate from tagging until harvest and the evaluation of the correlated response in survival rate to selection for harvest weight in the genetically improved farmed tilapia (GIFT) strain. The heritability for survival rate was low (0.038), and so was its genetic correlation with harvest weight (0.065), suggesting that selecting for the latter trait would have had no effect on survival. The calculation of the probability of survival by spawning season and line, fitting a model that included the random effects of individual animal and common environment, confirmed this prediction. There were very small and variable between line differences in the probability of survival, which generally favoured the selection line. We conclude that the focus of the GIFT programme on improving harvest weight was not detrimental to the survival of the fish during the grow-out phase.

引用

页码：47 / 55

页数：9

共 35 条

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[22] Evaluation of genetic polymorphism, genomic template stability, condition factor and hemato-biochemical parameters in response to slow reduction in water level during Nile tilapia (Oreochromis niloticus) harvest
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THAI JOURNAL OF VETERINARY MEDICINE, 2017, 47 (04): : 435 - 448
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[24] Additive genetic variation in resistance of Nile tilapia (Oreochromis niloticus) to Francisella orientalis and its genetic (co)variation to both harvest weight and resistance to Streptococcus agalactiae Ib
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[25] Response of chemokine receptors CXCR2 and integrin β2 after Streptococcus agalactiae and Aeromonas hydrophila challenge in GIFT strain of Nile tilapia Oreochromis niloticus
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[26] Genetic (co)variation between harvest weight and resistance to both Streptococcus iniae and S. agalactiae capsular type Ib in Nile tilapia (Oreochromis niloticus)
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[30] Genetic improvement of farmed tilapias: Response to five generations of selection for increased body weight at harvest in Oreochromis niloticus and the further impact of the project
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