Genetic improvement of farmed tilapias: the growth performance of eight strains of Oreochromis niloticus tested in different farm environments

Ambekar, Jalindar D.; Tayamen, Melchor M.; Vera, Marietta S. Palada-de; Danting, Jodecel C.; Reyes, Ruben A.; Dionisio, Edna E.; Capili, J.B.; Bolivar, Hernando L.; Abella, Tereso A.; Circa, Antonio V.; Bentsen, Hans B.; Gjerde, Bjarne; Gjedrem, Trygve; Pullin, R.S.V.

doi:10.1016/0044-8486(93)90035-w

Cited by 204 publications

(125 citation statements)

References 3 publications

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“…The Genetically Improved Farmed Tilapia (GIFT) Nile tilapia (Oreochromis niloticus) (Eknath et al, 1993;Gupta & Acosta, 2004), bred by the International Center for Living Aquatic Resources Management (ICLARM; now the WorldFish Center) and its partners, was introduced into China by Shanghai Fisheries University (now Shanghai Ocean University) in 1994. A series of evaluation studies in China from 1994 to 1996 indicated that the GIFT strain exhibited higher growth performance and seinability than previously introduced Nile tilapia strains/lines (Li et al, 1998;Li et al, 1999).…”

Section: Qtl 位点间存在连锁关系，显示 Scar 标记技术对选育世代间的纵向追溯、以及选育良种群体与其它养殖品系间的横向鉴别mentioning

confidence: 99%

RAPD-SCAR Markers for Genetically Improved NEW GIFT Nile Tilapia (Oreochromis niloticus niloticus L.) and Their Application in Strain Identification

Li¹,

Tang²,

Cai³

2010

Zoological Research

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Abstract:The NEW GIFT Nile tilapia (Oreochromis niloticus niloticus L.) is a nationally certificated new strain selected over 14 years and 9 generations from the base strain of GIFT Nile tilapia, introduced in 1994. This new variety has been extended in most of areas of China. The management of genetically improved strains, including the genetic markers for identification is needed urgently. RAPD analysis was conducted and their conversion to SCAR markers was developed. From NEW GIFT Nile tilapia, two strain-specific RAPD bands, S 304 624 bp and S 36 568 bp were identified. The strain-specific RAPD bands were gel-purified, cloned, and sequenced. Locus-specific primers were then designed to amplify the strain-specific bands. PCR amplification was conducted to test the variations in allele frequencies of two converted SCAR markers among the NEW GIFT Nile tilapia and its base strains, as well as 7 additional farmed strains worldwide. The frequency of SCAR marker I (553 bp) was 85.7% in NEW GIFT Nile tilapia, but 16.7% in the base strain. The frequency of SCAR marker II (558 bp) was 91.4% in NEW GIFT Nile tilapia, but 0% − 70% in the 7 other strains. In order to confirm the utility of these two markers, an examination was conducted for a wild population from Egypt, resulted the frequency of SCAR I and II was 10% and 70%, respectively, much lower than that of New GIFT strain. The increase in allele frequency of these two SCAR markers suggests that these markers might be genetically linked to the quantitative trait loci (QTL) underlining the performance traits by long term selection, and indicate the bright potential of SCAR marker technology for tracking generations during selection progress and for distinguishing among genetically improved strain and other strains.

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Section: Qtl 位点间存在连锁关系，显示 Scar 标记技术对选育世代间的纵向追溯、以及选育良种群体与其它养殖品系间的横向鉴别mentioning

confidence: 99%

RAPD-SCAR Markers for Genetically Improved NEW GIFT Nile Tilapia (Oreochromis niloticus niloticus L.) and Their Application in Strain Identification

Li¹,

Tang²,

Cai³

2010

Zoological Research

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“…De Silva et al (2004) pointed out that tilapias have made a significant contribution to food production, poverty alleviation and livelihood support in Asia and the Pacific region. GIFT strain of O. niloticus is a product of carefully conducted genetic selection and improvement strategy based on parent fish collected from four African countries (Egypt, Ghana, Kenya and Senegal) and four commercial O. niloticus strains from Israel, Singapore, Taiwan and Thailand (Eknath et al 1993;Dey and Gupta 2000). The GIFT strain has been shown to perform better than other strains of O. niloticus in pond and cage culture systems .…”

Section: Discussionmentioning

confidence: 99%

Performance of GIFT strain of Oreochromis niloticus in culture-based fisheries in non-perennial reservoirs, Sri Lanka

Wijenayake

Amarasinghe

Silva

2010

Sri Lanka J. Aquat.

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The superiority of Genetically Improved Farmed Tilapia (GIFT) strain of Oreochromis niloticus has been demonstrated under intensive culture conditions in ponds and cages but its performance under extensive culture conditions and interactions with other cultured species, such as in culture-based fisheries, is unknown. In the present study, performance of GIFT strain in culture-based fisheries in reservoirs of Sri Lanka was evaluated on the basis of specific growth rate, survival, species interaction and biological productivity of habitat. Fourteen non-perennial reservoirs were stocked with carps and GIFT strain and fish yield of all species in the 14 reservoirs studied ranged from 53.4 to 1800.7 kg ha -1 , which consisted of 0% to 32% of GIFT strain. Yield of GIFT strain varied from 0% to 188.3 kg ha -1 in the 14 reservoirs. Results of the analysis indicated that biological productivity of the non-perennial reservoirs had greater influence on carp yield than on yield of GIFT strain. Also, there was no significant difference (p > 0.05) between mean fish yields of GIFT strain and non-GIFT strain in culture-based fisheries of non-perennial reservoirs. High variability of specific growth rate of GIFT strain is evident in culture-based fisheries in non-perennial reservoirs. The GIFT strain, which requires supplementary feeding for achieving its maximum growth potential, may be incapable of competing with other species for natural food in the non-perennial reservoirs. As such, GIFT strain is not a suitable candidate for the development of culture-based fisheries in non-perennial reservoirs of Sri Lanka.

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“…A number of studies in recent years have demonstrated that there are large differences in the relative culture performance of different populations and strains of tilapia across a range of different environments [2,10].…”

Section: Discussionmentioning

confidence: 99%

Comparative Growth Performance and Proximate Nutrient Composition of Three Local Strains of Nile Tilapia (Oreochromis Niloticus L.) Collected From Different Locations in Uganda

Kwikiriza¹,

Barekye²,

Ar³

et al. 2017

Fish Aquac J

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The availability of O. niloticus fingerlings remains a problem in South Western Highland Agro-Ecological Zones. Most fish farmers produce only small sized fish probably because of inbreeding in Uganda. Brood stocks of Nile tilapia, Oreochromis niloticus L. were collected from Lakes Victoria, Kyoga and Kayumbu, a minor lake in SWHAEZ. The brood-stock were conditioned and bred. Fingerlings of F1 generation of each strain were fed diet containing 35% Crude Protein for 90 days. The results showed that Victoria strain growth performance was better compared to other tilapia strains in growth performance. Survival rate was not significantly different among Nile tilapia strains. Crude protein contents in fish body was higher in Victoria (69.30%) followed by Kayumbu strains (68.125%) with Kyoga having the least crude protein content (64.5%). Fish body of Kayumbu strains contained higher values of crude fat (11.70%) followed by Victoria strain (9.90%) while Kyoga strain had the least crude lipid (8.50%). The Victoria strain (47.8 g feed/fish) had significantly higher feed intake and PER than all the other strains. Kyoga and Kayumbu strains were comparable in terms of feed intake. However, the Kayumbu strain had significantly the least PER (2.46). The lowest FCR value was obtained in Kayumbu strain (1.67), while the higher ones were obtained in Kyoga and Victoria strains 1.82 and 1.78, respectively). The poor performance of kayumbu strain was probably due to in breeding and other environmental factors like temperatures. Therefore, exploitation of the genetic variation within the different native wild strains through selective breeding can help to improve growth performance of the Kayumbu strain in South Western Highland Agro-Ecological Zones (SWHAEZ).

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Genetic improvement of farmed tilapias: the growth performance of eight strains of Oreochromis niloticus tested in different farm environments

Cited by 204 publications

References 3 publications

RAPD-SCAR Markers for Genetically Improved NEW GIFT Nile Tilapia (<I>Oreochromis niloticus niloticus</I> L.) and Their Application in Strain Identification

RAPD-SCAR Markers for Genetically Improved NEW GIFT Nile Tilapia (<I>Oreochromis niloticus niloticus</I> L.) and Their Application in Strain Identification

Performance of GIFT strain of <i>Oreochromis niloticus</i> in culture-based fisheries in non-perennial reservoirs, Sri Lanka

Comparative Growth Performance and Proximate Nutrient Composition of Three Local Strains of Nile Tilapia (Oreochromis Niloticus L.) Collected From Different Locations in Uganda

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