Polymorphisms and genes associated with puberty in heifers

Area of Science:

• Animal Genetics
• Reproductive Biology
• Quantitative Genetics

Background:

• Puberty onset is a complex trait influenced by genetics and environment, particularly nutrition.
• Genes, genetic variations, and regulatory networks form the molecular basis of puberty.
• Identifying genetic determinants is crucial for improving cattle breeding strategies.

Purpose of the Study:

• To review the discovery of genes and polymorphisms associated with heifer puberty.
• To discuss the application of genetic knowledge for breeding early-pubertal Bos indicus-influenced cattle.

Main Methods:

• Candidate gene studies
• Quantitative trait loci (QTL) analyses
• Genome-wide association studies (GWAS)
• Transcriptome (global gene expression) studies

Main Results:

• Multiple genetic polymorphisms and genes linked to heifer puberty phenotypes have been identified.
• Advances in genomic technologies have accelerated gene discovery for puberty traits.
• Evolving knowledge provides opportunities for marker-assisted selection in cattle breeding.

Conclusions:

• Genetic research has identified key determinants of puberty onset in cattle.
• Leveraging genetic insights can enhance breeding programs for earlier puberty in Bos indicus-influenced cattle.
• Continued research into genetic architecture will further optimize breeding for reproductive efficiency.