ArticleMarine biotechnology (New York, N.Y.)2024
Development of DNA Insertion-specific Markers Based on the Intron Region of Oplegnathus punctatus itih4b for Genetic Sex Identification.
Article in Marine biotechnology (New York, N.Y.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Spotted knifejaw (Oplegnathus punctatus) is a significant marine fish species that exhibits pronounced sexual dimorphism, with males generally exhibiting greater weight and growth rates than females. Therefore, the farming of O. punctatus with a high proportion of males is beneficial for improving the quality and efficiency of the O. punctatus aquaculture industry. Furthermore, the development of a rapid technique in sexing O. punctatus fry will facilitate the selection and breeding of superior male varieties of O. punctatus. In this study, genome-wide scanning, comparative genomics, and structural variation analysis methods were employed to identify and extract the homologous region of the inter-alpha-trypsin inhibitor heavy chain 4 (itih4b) gene on the X and Y chromosomes from the complete genome sequence of O. punctatus. This analysis revealed the presence of a large segment of DNA insertion markers on the Y chromosome in the region. Itih4b plays an important role in the mechanisms that regulate inflammatory and immune responses in multicellular organisms. The method described here involved the design of a pair of primers to amplify two bands of 532 bp and 333 bp in males (individuals with DNA insertion variants in the intron of the itih4b gene). In females (individuals without DNA insertion), only one band of 333 bp could be distinguished by agarose gel electrophoresis. This method shortened the time required to accurately characterize intronic DNA insertion variants and genetic sexes in O. punctatus, thereby improving detection efficiency. This study has significant value for the large-scale breeding of O. punctatus all-male seedlings and provides a reference point for the study of intron variation regulation and RNA shearing in the itih4b gene.
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