Selection response for<i>Streptococcus agalactiae</i>resistance in Nile tilapia<i>Oreochromis niloticus</i>

Suebsong, Wasana; Poompuang, Supawadee; Srisapoome, Prapansak; Koonawootrittriron, Skorn; Luengnaruemitchai, Amorn; Johansen, Harry; Rye, Morten

doi:10.1111/jfd.13074

Cited by 27 publications

(16 citation statements)

References 43 publications

(91 reference statements)

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“…Myogenesis corresponds to the formation of muscle fibers involved in the differentiation, fusion, and absorption of myogenic precursor cells to form syncytial fibers 61 . Additionally, resistance to infectious diseases is an economically relevant trait and is considered a long-term aim because of the consequences of this trait on fish health and growth 62 . In Nile tilapia there are programs that select for disease resistance 7 , but none of the strains used in this study has been artificially selected for disease resistance.…”

Section: Signatures Of Selectionmentioning

confidence: 99%

Whole genome re-sequencing reveals recent signatures of selection in three strains of farmed Nile tilapia (Oreochromis niloticus)

Cádiz

López

Díaz-Domínguez

et al. 2020

Sci Rep

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Nile tilapia belongs to the second most cultivated group of fish in the world, mainly because of its favorable characteristics for production. Genetic improvement programs and domestication process of Nile tilapia may have modified the genome through selective pressure, leaving signals that can be detected at the molecular level. In this work, signatures of selection were identified using genomewide SNP data, by two haplotype-based (iHS and Rsb) and one F ST based method. Whole-genome re-sequencing of 326 individuals from three strains (A, B and C) of farmed tilapia maintained in Brazil and Costa Rica was carried out using Illumina HiSeq 2500 technology. After applying conventional SNP-calling and quality-control filters, ~ 1.3 M high-quality SNPs were inferred and used as input for the iHS, Rsb and F ST based methods. We detected several candidate genes putatively subjected to selection in each strain. A considerable number of these genes are associated with growth (e.g. NCAPG, KLF3, TBC1D1, TTN), early development (e.g. FGFR3, PFKFB3), and immunity traits (e.g. NLRC3, PIGR, MAP1S). These candidate genes represent putative genomic landmarks that could be associated to traits of biological and commercial interest in farmed nile tilapia. Nile tilapia (Oreochromis niloticus) is a teleost fish of the Cichlidae family native to Africa and the Middle East. The geographic range of the species extends from 8°N to 32°N 1. The first record of domestication is dated around 3,500 years ago as evidenced in paintings at the Theban tombs in Egypt 2. Nowadays, this species is the second most cultivated group of fish in the world 3. Favorable characteristics for production include rapid growth, adaptability to different culture conditions, tolerance to high densities, disease resistance, easy reproduction, and tolerance to low concentrations of oxygen 4. Genetic improvement programs (GIPs) for Nile tilapia began in 1988 as an approach to counteract the production decrease generated by introgressions with Mozambique tilapia (Oreochromis mossambicus) 5,6. Since then, nearly twenty GIPs have been established for Nile tilapia around the world 7,8. GIPs aim to improve traits of commercial interest, such as growth rate, disease resistance, cold and salinity tolerance 7. The GIFT (Genetic Improvement of Farmed Tilapia) 9 Nile tilapia strain was developed by the ICLARM (International Centre for Living Aquatic Resources Management, now the WorldFish Center), in collaboration with the Norwegian Institute of Aquaculture Research (AKVAFORSK, now NOFIMA Marin) 1. The implementation of GIPs for the GIFT population has been successful, because growth rate in Nile tilapia has doubled in five generations, showing that this species had a positive response to selection 1 .

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Section: Signatures Of Selectionmentioning

confidence: 99%

Whole genome re-sequencing reveals recent signatures of selection in three strains of farmed Nile tilapia (Oreochromis niloticus)

Cádiz

López

Díaz-Domínguez

et al. 2020

Sci Rep

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“…This validation can be done either in laboratory or in the field conditions. It has been shown via experimental validation that the risk of mortality can decrease up to 54% by selecting for S. agalactiae in Nile tilapia (Suebsong et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of genetic selection for resistance againstStreptococcus agalactiaevia different routes of infection in the commercial Nile tilapia breeding programme

Joshi

Skaaurd

Alvarez

2020

J Animal Breeding Genetics

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Nile tilapia is reared commercially in more than 120 countries worldwide with an estimated market value of 9.8 billion US dollars (FAO, 2019;Weimin, 2017). Farmed Nile tilapia are susceptible to various diseases (Amal & Zamri-Saad, 2011), which directly threatens the livelihood and food security of millions of small-scale farmers in the developing and underdeveloped countries. The economic impact of Streptococcosis alone on Tilapia industry is greater than 1 billion USD .

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“…The correlation pattern between disease resistance and growth is host-specific and pathogen-specific (Gjedrem 2015). On the other hand, Suebsong et al (2019) reported the same thing selective breeding programs have significant potential to make tilapia more resistant to Streptococcus agalactiae. Heritability estimates for G0 were 0.22 using the Cox model.…”

Section: Discussionmentioning

confidence: 99%

Assessing the susceptibility of the selected gourami (Osphronemus goramy) to Aeromonas hydrophila

2021

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Abstract. Febrianti R, Khasani I, Rosada KK. 2021. Assessing the susceptibility of the selected gourami (Osphronemus goramy) to Aeromonas hydrophila. Nusantara Bioscience 13: 111-120. A breeding program to improve the growth performance of the gourami fish was carried out through selection methods that produced faster growth gourami (selected population). The purpose of this study was to determine the susceptibility of the selected gourami to Aeromonas hydrophila infection based on tolerance limits (LD50) and investigated clinical signs post-injection of the pathogenic bacteria. The challenge test by intramuscular injection of A. hydrophila was done to the fingerling fish (15-20 g) for 14 days post-infection. The population of the tested fish was obtained from six families, selected gourami (SP), and non-selected control (CP) groups. Phosphate buffered saline (PBS) as control and several doses of the pathogen, 102, 104, 105, 106, 107, and 108 CFU/mL of A. hydrophila, were injected into the fish. Fish mortality and clinical signs were observed daily. The fish mortality was confirmed by isolating bacteria in the fish which showed clinical signs, followed by biochemical characterization of the isolated bacteria using API 20E and PCR. The LD50 of A. hydrophila to the selected population (9.70 × 105 CFU/mL) was higher than that of the control (6.50 × 104 CFU/mL). On the final day of the test, the accumulation mortality of CP (63.33±5.77%) higher than that in SP (33.33±5.77%). Based on the output test statistics, it was known that there was a significant difference between the mortality and clinical signs of SP and CP. The data suggested that the selected gourami were more resistant to A. hydrophila infection than that of the control. The A. hydrophila infection caused most of the major clinical signs, including mass mortality of the fish. The biochemical and PCR test ensure that fish mortality was caused by A. hydrophila infection.

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Selection response forStreptococcus agalactiaeresistance in Nile tilapiaOreochromis niloticus

Cited by 27 publications

References 43 publications

Whole genome re-sequencing reveals recent signatures of selection in three strains of farmed Nile tilapia (Oreochromis niloticus)

Whole genome re-sequencing reveals recent signatures of selection in three strains of farmed Nile tilapia (Oreochromis niloticus)

Experimental validation of genetic selection for resistance againstStreptococcus agalactiaevia different routes of infection in the commercial Nile tilapia breeding programme

Assessing the susceptibility of the selected gourami (Osphronemus goramy) to Aeromonas hydrophila

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