Sex determination in cat fish

Metrics details. Sex determination mechanisms in teleost fish broadly differ from mammals and birds, with sex chromosomes that are far less differentiated and recombination often occurring along the length of the X and Y chromosomes, posing major challenges for the identification of specific sex determination genes. Here, we take an innovative approach of comparative genome analysis of the genomic sequences of the X chromosome and newly sequenced Y chromosome in the channel catfish. Using a YY channel catfish as the sequencing template, we generated, assembled, and annotated the Y genome sequence of channel catfish. The genome sequence assembly had a contig N50 size of 2. Genetic linkage and GWAS analyses placed the sex determination locus within a genetic distance less than 0.
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29.01.2021
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Determinação do sexo em catfish de canal (Ictalurus punctatus) utilizando endoscopia

Determining the sex of individuals is often crucial to effective fishery management. Growth rates, for example, can vary by sex, as female walleye grow faster and attain larger sizes than males Henderson et al. In impoundment management, stocking female only largemouth bass can prevent overpopulation and maximize growth potential Bonvechio and Rydell In aquaculture, manipulating catfish sex ratios can influence egg and young production SRAC , requiring culturists know the sex of fish. As catfish are one of the most popular groups for aquaculture, sex-related aspects of production and spawning behavior have been fairly well-described at least in captivity for some species.
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Sex determination in channel catfish Ictalurus punctatus using endoscopy. Ceres Impr. ISSN X. Sex identification in fish is an important practice for the development of broodstock management strategies. Endoscopy can be used for sex identification, although in fish, it is still restricted.
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Background: Sex determination mechanisms in teleost fish broadly differ from mammals and birds, with sex chromosomes that are far less differentiated and recombination often occurring along the length of the X and Y chromosomes, posing major challenges for the identification of specific sex determination genes. Here, we take an innovative approach of comparative genome analysis of the genomic sequences of the X chromosome and newly sequenced Y chromosome in the channel catfish. Results: Using a YY channel catfish as the sequencing template, we generated, assembled, and annotated the Y genome sequence of channel catfish. The genome sequence assembly had a contig N50 size of 2. Genetic linkage and GWAS analyses placed the sex determination locus within a genetic distance less than 0.
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