Genetic improvement of farmed tilapias: growth performance in a complete diallel cross experiment with eight strains of Oreochromis niloticus

Bentsen, Hans B.; Ambekar, Jalindar D.; Vera, Marietta S. Palada-de; Danting, Jodecel C.; Bolivar, Hernando L.; Reyes, Ruben A.; Dionisio, Edna E.; Longalong, Felicisima M.; Circa, Antonio V.; Tayamen, Melchor M.; Gjerde, Bjarne

doi:10.1016/s0044-8486(97)00230-5

Cited by 160 publications

(105 citation statements)

References 16 publications

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“…When one wants to improve performance in a range of environments simultaneously, general adaptation or robustness (as opposite to environmental sensitivity) of animals may become an important trait for selection (Falconer, 1990). In these respects, Bentsen et al (1998) presented interesting results on hybrid and purebred tropical fish, tilapia. These results suggest that hybrids may be more sensitive to genotype × environment interactions affecting the nonadditive component of performance.…”

Section: Definition Of Animal Breeding Goals Formentioning

confidence: 99%

Definition of animal breeding goals for sustainable production systems.

Olesen

Groen

Gjerde

2000

Journal of Animal Science

141

133

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ABSTRACT:What we do is determined by the way we "view" a complex issue and what sample of issues or events we choose to deal with. In this paper, a model based on a communal, cultural, or people-centered worldview, informed by a subjective epistemology and a holistic ontology, is considered. Definitions and interpretations of sustainable agriculture are reviewed. Common elements in published definitions of sustainable agriculture and animal production among those who seek long-term and equitable solutions for food production are resource efficiency, profitability, productivity, environmental soundness, biodiversity, social viability, and ethical aspects. Possible characteristics of future sustainable production systems and further development are presented. The impact of these characteristics on animal breeding goals is reviewed. The need for long-term biologically, ecologically, and sociologi-

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Section: Definition Of Animal Breeding Goals Formentioning

confidence: 99%

Definition of animal breeding goals for sustainable production systems.

Olesen

Groen

Gjerde

2000

Journal of Animal Science

141

133

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“…La menor variabilidad genética de la lí-nea GIFT (%FP: 79,17%; IS: 0,469) al ser comparada con la Bouaké y la Chitralada pudo ser debida a que la GIFT fue constituida a partir del cruzamiento de cuatro líneas comerciales (provenientes de piscifactorías ubicadas en Filipinas, Israel, Singapur, Taiwán y Tailandia) y cuatro líneas salvajes (Egipto, Gana, Kenia y Senegal) de Oreochromis niloticus (Bentsen et al, 1998) mediante programas de mejoramiento gené-tico durante 10 generaciones (Asian Development Bank, 2005), reduciendo el nivel de variabilidad genética como resultado del incremento de la homocigosis, que en consecuencia puede generar niveles variables e inevitables de consanguinidad.…”

Section: Resultados Y Discusiónunclassified

Caracterización genética de tres líneas de tilapia del Nilo (Oreochromis niloticus)

et al. 2011

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RESUMENEl objetivo de este estudio fue analizar la diversidad genética de tres líneas de tilapia del Nilo (Oreochromis niloticus), mediante marcadores RAPDs. Se analizaron 90 individuos adultos (30 de cada línea) de dos piscifactorías ubicadas en las ciudades de Maringá (líneas Bouaké -B y GIFT -G) y Guaíra (línea Chitralada -C), en el Estado del Paraná (Brasil). Los 13 oligonucleótidos seleccionados produjeron 72 fragmentos de los cuales 60 (83,3%) fueron polimórficos. Fueron observadas diferencias (p<0,05) en la frecuencia de 33 fragmentos, con 14 excluidos. Los resultados de variabilidad genética estimados por el porcentaje de fragmentos polimórficos y por el índice de diversidad genética de Shannon indicaron una alta variabilidad genética intra-poblacional. De acuerdo con el AMOVA, la mayor parte de la variación está dentro de cada línea. Este resultado se corroboró con los valores de FST, que mostraron una moderada diferenciación genética. También se constató que C y G fueron las líneas más semejantes genéticamente y que B y G presentaron menos genes en común. Los resultados de este estudio posibilitaran el correcto manejo reproductivo y genético de estas líneas de peces. SUMMARYThe aim of this study was to analyze the genetic diversity of three Nile tilapia (Oreochromis niloticus) strains, through the RAPD markers. Ninety adult individuals (30 of each strain) of two fish farms stations located in the Maringá (Bouaké -B and GIFT -G strains) and Guaíra (Chitralada -C strain) cities, in the Paraná State (Brazil) were analyzed. The 13 selected primers yielded 72 fragments of which 60 (83.3%) were polymorphic. Differences (p<0.05) in the frequency of 33 fragments were observed, with 14 eliminated. The genetic variability results estimated by the percentage of polymorphic fragments and for the genetic diversity of Shannon index indicated a high intra-populational genetic variability. According with the AMOVA, most of the variation is within each strain. This result was corroborated with the FST values that showed a moderate genetic differentiation. It was also verified that C and G were the strains but similar genetically and that B and G presented less genes in common. The results of this study facilitated the correct reproductive and genetic management of these fish strains. INTRODUCCIÓNEn Brasil la producción total acuícola pasó de aproximadamente 30 000 toneladas en el inicio de los años noventa, hasta un

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“…It is the largest fish breeding program conducted in the Philippines tilapia (Bentsen et al, 1998). Genomar Supreme Tilapia TM strain is the continuation of the GIFT program after a 10-year period, ending in 1998 (Gjoen, 2004), and has since become commercialized in Brazil.…”

Section: Introductionmentioning

confidence: 99%

<b>Influence of rearing temperature on muscle growth and adipose tissue in Nile tilapia (<i>Oreochromis niloticus</i>) strains

Salomão

Santos

Mareco

2017

Acta Sci. Anim. Sci.

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ABSTRACT. This study aimed to evaluate the effect of temperature on the tissue growth of Red, GIFT and Supreme tilapia strains. Fingerlings of approximately 1.4 g from male populations were reared for a period of 60 days, in three recirculating systems, each system containing 6 water tanks of 0.5 m³, at three temperatures (22, 28 and 30ºC). Ten fish of each recirculation system and each temperature studied were sampled. Fishes have been anesthetized, euthanized and weighed. The samplings have been done from the dorsal musculature, caudal, visceral and ventral subcutaneous adipose tissue. Histological sections were prepared and evaluated to determine the diameter of the cells. The experimental design was completely randomized factorial 3 X 3 (strain X temperature). Analysis of variance was performed and means were compared. Higher weights were found for fish reared at 30°C (56.23 g) compared to those grown at 28 (42.12 g) or 22°C (10.52 g). The cooled water temperature (22°C) may have contributed to the hypertrophy of white muscle fibers and visceral adipocytes from tilapia, compared to 28 or 30ºC. Red Tilapia, GIFT and Supreme strains show differences in muscle growth and adipose tissues in response to temperature of cultivation.Keywords: adipocytes, white fibers, red fibers, GIFT strain, red strain, supreme strain.Influência da temperatura de cultivo no crescimento muscular e do tecido adiposo em linhagens de tilápia do Nilo (Oreochromis niloticus) RESUMO. Objetivou-se avaliar o efeito da temperatura no crescimento dos tecidos de tilápias do Nilo das linhagens Vermelha, GIFT e Supreme. Alevinos de aproximadamente 1,4 g, oriundos de populações de machos revertidos, foram mantidos em três sistemas de recirculação. Cada sistema contendo contém seis caixas d'água de 0,5 m³, em três temperaturas (22, 28 e 30ºC). Foram coletados dez peixes de cada tratamento. Os peixes foram insensibilizados, eutanasiados e pesados. Foram realizadas amostragens das regiões da musculatura dorsal, do pedúnculo caudal, do tecido adiposo subcutâneo ventral e visceral. Lâminas histológicas foram confeccionadas e avaliadas para determinar o diâmetro das células. O delineamento experimental foi inteiramente casualizado em esquema fatorial 3 X 3 (linhagem X temperatura). A análise de variância foi realizada e as médias foram comparadas. Maiores pesos foram encontrados para os peixes cultivados a 30ºC (56,23 g), quando comparados àqueles cultivados a 28 (42,12 g) ou 22ºC (10,52 g). A temperatura resfriada da água (22ºC) pode ter contribuído para a hipertrofia das fibras musculares brancas e dos adipócitos viscerais das tilápias, quando comparada a 28 ou 30ºC. As linhagens de tilápia Vermelha, GIFT e Supreme apresentam diferenças de crescimento do tecido muscular e adiposo em resposta à temperatura de cultivo.Palavras-chave: adipócitos, fibras brancas, fibras vermelhas, linhagem GIFT, linhagem vermelha, linhagem supreme.

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Genetic improvement of farmed tilapias: growth performance in a complete diallel cross experiment with eight strains of Oreochromis niloticus

Cited by 160 publications

References 16 publications

Definition of animal breeding goals for sustainable production systems.

Definition of animal breeding goals for sustainable production systems.

Caracterización genética de tres líneas de tilapia del Nilo (Oreochromis niloticus)

<b>Influence of rearing temperature on muscle growth and adipose tissue in Nile tilapia (<i>Oreochromis niloticus</i>) strains

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