Tilapia sex determination: Where temperature and genetics meet

Baroiller, Jean‐François; D'Cotta, Hélèna; Bezault, Étienne; Wessels, Stephan; Hoerstgen-Schwark, Gabriele

doi:10.1016/j.cbpa.2008.11.018

Cited by 200 publications

(174 citation statements)

References 70 publications

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“…Although the water temperature during the fry stage could have influenced the final proportion of males observed, we cannot rule out the possibility that the combination of breeders used could be the only factor responsible for the variation observed, especially in atypical fish three and four. An important parental effect may be responsible in accordance with that proposed by Baroiller et al (2009) for the high proportion of males observed. Further work needs to be done to establish whether these variations are the result of a genetic tendency involving the water temperature or simply the product of the parental genetics.…”

Section: ___________________supporting

confidence: 83%

“…Wang & Tsai (2000) report that the exposure of 10-day-old fry to water temperatures from 28º to 32°C could induce gonadal masculinization and therefore an increase in the proportion of males. Baroiller et al (2009), mention that this temperature sensitivity of Nile tilapia during sex differentiation is not seen in all progenies. Some male or female breeders provide progenies displaying a high sensitivity to temperature giving a high proportion of males in their sex ratio, while others gave an insensitive balanced sex ratio.…”

Section: ___________________mentioning

confidence: 93%

“…In our case, progeny sex ratios of males in the eight atypical fish with an XY genotype varied from 69 to 91% but with a mean close to 78%. These variations could be explained by the interaction of the three components that governed sex in the Nile tilapia, a complex genetic sex determination system with a major determinant locus (sex chromosomes XX/XY) and some minor genetic factors (parental factors), as well as the influence of the temperature (environmental factors) (Baroiller et al, 2009). Wang & Tsai (2000) report that the exposure of 10-day-old fry to water temperatures from 28º to 32°C could induce gonadal masculinization and therefore an increase in the proportion of males.…”

Section: ___________________mentioning

confidence: 99%

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Production of YY male of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) from atypical fish

Alcántar‐Vázquez

Torre

Calzada-Ruiz

et al. 2014

lajar

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ABSTRACT. Successful YY technology depends on the production of XY females. However, their identification is complicated because they are indistinguishable from normal females. Atypical fish could offer an alternative for a more rapid and precise identification. Progeny of atypical fish was evaluated in order to produce YY-males. In total, nine atypical fish and 18 normal males were selected. The fish were placed in 8 m 3 concrete tanks at a 2:1 sex ratio. The produced fry were collected and reared at 28 ± 1ºC in 85 L aquaria. Juveniles were placed in net cages for 30 days and finally in 8 m 3 concrete tanks until the age of 120 days. Progeny test was achieved evaluating differences between sexes in the genital papilla structure. Six of the nine atypical fish selected showed the 3:1 sex ratio (male-female) expected for sex-reversed females. A significantly higher proportion of males than the expected 3:1 distribution were observed in two atypical fish. This boost in male proportion could be attributed to a parental effect interacting with the water temperature during the fry stage. Use of atypical fish could help reduce the time and effort spent to identify XY females during the initial stage of YY technology. Keywords: Oreochromis niloticus, progeny of atypical fish, YY-male, sex-reversed females, genital papilla. Producción de machos YY de tilapia del Nilo Oreochromis niloticus(Linnaeus, 1758) a partir de peces atípicos RESUMEN. La aplicación exitosa de la tecnología YY depende de la producción de hembras XY. Sin embargo, su identificación es complicada, ya que son indistinguibles de las hembras normales. Los peces atípicos podrían ofrecer una alternativa para una más rápida y precisa identificación. Se evaluó la progenie de nueve peces atípicos con la finalidad de producir machos YY. Los alevines obtenidos se criaron a 28 ± 1ºC en acuarios de 85 L. Los juveniles fueron colocados en jaulas flotantes por 30 días y, finalmente, en estanques de 8 m 3 hasta los 120 días de edad. La prueba de progenie se realizó evaluando las diferencias entre sexos en la estructura de la papila genital. Seis de los nueve peces atípicos seleccionados mostraron la proporción de sexos 3:1 (machohembra) esperada para hembras revertidas. Se observó una proporción de machos significativamente mayor a la distribución 3:1 esperada en dos peces atípicos. Este aumento en la proporción de machos puede ser atribuido a la interacción del efecto parental con la temperatura del agua durante la etapa de alevín. El uso de peces atípicos podría reducir el tiempo y esfuerzo empleados en la identificación de hembras XY durante la etapa inicial de la tecnología YY. Palabras clave: Oreochromis niloticus, progenie de peces atípicos, macho YY, hembras revertidas, papila genital.

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Section: ___________________supporting

confidence: 83%

Section: ___________________mentioning

confidence: 93%

Section: ___________________mentioning

confidence: 99%

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Production of YY male of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) from atypical fish

Alcántar‐Vázquez

Torre

Calzada-Ruiz

et al. 2014

lajar

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“…Although sex is determined by sex chromosome-linked genes Sry and Dmrt1 in mammals and birds (Sinclair et al 1990;Smith et al 2009), sex determination in fish is a plastic process that is controlled by both genetic and environmental factors (Baroiller et al 2009). Interestingly, sex-determining genes were identified to be diverse in rainbow trout (Oncorhynchus mykiss), fugu (Takifugu rubripes), Patagonian pejerrey (Odontesthes hatcheri), and medaka (Oryzias latipes), and all of these genes are male-specific and located in the sex chromosome or sex-determining locus (Matsuda et al 2002;Hattori et al 2012;Kamiya et al 2012;Yano et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Transcriptome Provides Candidate Genes for Sex Determination/Differentiation and SSR/SNP Markers in Yellow Catfish

Chen

Mei

et al. 2014

Mar Biotechnol

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Sex dimorphic growth pattern has significant theory and application implications in fish. Recently, a Y-and Xspecific allele marker-assisted sex control technique has been developed for mass production of all-male population in yellow catfish (Pelteobagrus fulvidraco), but the genetic information for sex determination and sex control breeding has remained unclear. Here, we attempted to provide the first insight into a comprehensive transcriptome covering multiple tissues from XX females, XY males, and YY super-males of yellow catfish by using 454 GS-FLX platform, for a better assembly and gene coverage. A total of 1,202,933 high quality reads (about 540 Mbp) were obtained and assembled into 28,297 contigs and 141,951 singletons. BLASTX searches against the NCBI non-redundant protein database (nr) led a total of 52,564 unique sequences including 18,748 contigs and 33,816 singletons to match 25,669 known or predicted unique proteins. All of them with annotated function were categorized by gene ontology (GO) analysis, and 712 were assigned to reproduction and reproductive process. Some potential genes relevant to reproductive system including steroid hormone biosynthesis and GnRH (gonadotropin-releasing hormone) signaling pathway were further identified by Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis; and at least 21 sex determination and differentiation-related genes, such as Dmrt1, Sox9a/b, Cyp19b, WT1, and AMH were identified and characterized. Additionally, a total of 82,794 simple sequence repeats (SSRs), 26,450 single nucleotide polymorphisms (SNPs), and 4,145 insertions and deletions (INDELs) were revealed from the transcriptome data. Therefore, the current transcriptome resources highlight further studies on sex-control breeding in yellow catfish and will benefit future studies on reproduction and sex determination in teleost fish.

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“…niloticus has an XX/XY chromosome sex determination system (Baroiller et al, 2009), but the process of sex differentiation is labile rendering sex reversal possible in the species (Devlin and Nagahama, 2002). Several techniques have been adopted for production of monosex (all-male) tilapia (Phelps and Popma, 2000), and hormonal sex reversal of tilapia has been an active area of research for the past three decades (Pandian and Varadaraj, 1988;Gale et al, 1999;Carrasco et al, 1999;Afonso et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Untitled

Chakraborty¹,

Mazumdar²,

Chatterji³

et al. 2011

Turk. J. Fish. Aquat. Sci.

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Growth of 17α-methyltestosterone treated monosex Nile tilapia, Oreochromis niloticus was compared with hormone untreated mixed-sex fish in four different culture systems. The experiment had 2 X 4 factorial design: the first factor was presence or absence of hormone treatment (monosex and mixed-sex fish), the second factor was related to culture system (cistern, flow-through, pen and pond). Fish were cultured under similar feeding regime and stocking density for six months and different growth parameters such as body weight, length, daily weight gain (DWG), specific growth rate (SGR), proximate body composition and survival rate were analyzed. Monosex tilapia showed significantly higher (P-value <0.05) weight, length, DWG, SGR and protein content than mixed-sex fish. Fish in Pond culture showed significantly higher (Pvalue <0.05) weight, DWG and protein content than fish in other 3 culture systems. Survival was not significantly different (P>0.05) among mixed-sex and monosex fish and between different culture systems. Monosex tilapia in pond culture system showed the highest weight, DWG and protein content while mixed-sex tilapia in cistern culture system showed the lowest weight, DWG and protein content. Considering the results of this study, culture of monosex tilapia in earthen ponds might be considered the ideal method for tilapia culture in India.Keywords: Oreochromis niloticus, monosex culture, growth in different culture systems. Monoseks ve Karma Nil Tilapiyasının Farklı Kültür Sistemlerinde Büyümesi ÖzetDört farklı kültür sisteminde 17 α -metiltestosteron uygulaması yapılan tek cinsiyetli Nil Tilapiyasının, Oreochromis niloticus büyümesi ile hormon uygulanması yapılmayan karma cinsiyetli balıklar karşılaştırılmıştır. Deney, 2 X 4 etmensel tasarımdan oluşmaktadır: birinci etmen hormon uygulaması (tek cinsiyet ve karma cinsiyetli balık), ikinci etmen ise kültür sistemidir (rezervuar, tek kullanım sistemi, kafes ve havuz sistemi). Altı ay boyunca balıklar beslenme ve stoklama yoğunluğunun benzer olduğu koşullarda kültüre alınmış; vücut ağırlığı, boy, günlük ağırlık artışı (DWG), spesifik büyüme oranı (SGR), yaklaşık vücut kompozisyonu ve yaşama oranı gibi farklı büyüme parametreleri analiz edilmiştir. Tek cinsiyetli tilapyanın, karma cinsiyetli balıklarla karşılaştırıldığında istatistiksel olarak daha yüksek (P<0,05 ) ağırlık, boy, DWG, SGR ve protein içeriğine sahip olduğu gösterilmiştir. Havuzda kültüre alının balıklar ise diğer 3 kültür sistemindeki balıklarla karşılaştırıldığında istatistiksel olarak daha yüksek (P<0,05) ağırlık, DWG ve protein içeriğine sahip olduğu gösterilmiştir.Karma cinsiyetli ve tek cinsiyetli balıklar içerisinde ve farklı kültür sistemleri arasında yaşama oranında istatistiksel olarak anlamlı fark bulunmamıştır (P>0,05). Havuz kültür sistemlerindeki tek cinsiyetli tilapiyanın en yüksek ağırlığa, DWG ve protein içeriğine sahip olurken, rezervuar kültür sistemindeki karma cinsiyetli tilapiyanın en düşük ağırlığa, DWG ve protein içeriğine sahip olduğu gösterilmiştir. Bu çalı...

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Tilapia sex determination: Where temperature and genetics meet

Cited by 200 publications

References 70 publications

Production of YY male of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) from atypical fish

Production of YY male of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) from atypical fish

A Comprehensive Transcriptome Provides Candidate Genes for Sex Determination/Differentiation and SSR/SNP Markers in Yellow Catfish

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