Exploring the Genetic Dimensions of Sex-sorted Semen: A Review

Sexed semen is one of the strategies that dairy producers nowadays need to use in order to have an upper hand in the market. Several techniques for separating the X and Y chromosomes have also been developed, based on variations in swimming patterns, differences in bulk and motility, the presence of surface charges and immunological variances. In order to enable farmers to receive the greatest benefits from dairy farming, a number of government breed development schemes currently use sexed semen technology. A few available elite cows might be used to make superior bulls by adding sexed male sperm. Sexed semen technology ensures that each bull has the required number of offspring under the progeny testing scheme, improving the accuracy of bull testing. By selecting replacement dams that are genetically superior, selection intensity is raised, accelerating the pace of genetic gain in dairy herds. A decline in the number of Y chromosomes in population of the subject breed could eventually lead to Y chromosome degeneration and extinction, with major and unanticipated implications. Over exploitation of sexed semen for inseminating elite dairy animals will eventually dilute the superior germplasm and also will lead to inbreeding depression in a dairy herd over a period of time. Therefore, careful consideration must be given to potential challenges such as reduced conception rates, genetic bottlenecks and maintaining genetic diversity. When integrated strategically, sexed semen serves as a powerful tool for advancing genetic improvement and sustainability in animal production systems.