In a breakthrough study poised to transform the genetic landscape of Brazilian beef production, researchers at São Paulo State University (UNESP) have harnessed the power of multi-omics integration to unravel the complex molecular architecture underlying carcass and meat quality traits in Nelore cattle, a breed of Bos taurus indicus fundamental to the country’s beef industry. By identifying a robust array of genetic markers and biological pathways, this pioneering research sets the stage for unprecedented precision in selecting animals that not only excel in productivity but also deliver superior meat quality—an outcome of profound significance for Brazil, the world’s leading beef exporter.
Unlike previous studies that examined genes, transcripts, or proteins in isolation, this investigation, drawing upon data from nearly 7,000 young Nelore bulls across four commercial genetic improvement programs, uniquely combines genomics, transcriptomics, and proteomics approaches. This integrative strategy enables a panoramic, systems-level understanding of the molecular networks influencing phenotypic variation. The biological samples, meticulously collected immediately post-slaughter, allowed for a comprehensive assessment of traits directly impacting carcass yield and meat quality, including tenderness, marbling, and subcutaneous fat thickness.
Dr. Gabriela Frezarim, the first author and principal investigator during her PhD tenure at FCAV-UNESP, emphasizes that this integrative omics approach was essential to bypass the limitations of single-method analyses. “No single technique suffices to decode the intricate biological systems regulating meat and carcass traits,” she explains. Instead, blending diverse molecular layers illuminated not only isolated gene candidates but also revealed intricate biological pathways and protein interactions driving phenotypic outcomes, fostering a deeper mechanistic insight valuable for genetic improvement initiatives.
Guided by Professor Lucia Galvão de Albuquerque, who coordinates the wider project entitled “Genetic aspects of quality, efficiency, and sustainability of meat production in Nelore cattle,” the team delivered strong molecular evidence of how genes implicated in growth regulation, cell cycle control, and stress response proteins are intricately tied to meat tenderness. Heat shock proteins emerged as key modulators, maintaining muscle fiber integrity and orchestrating optimal protein degradation post-mortem, processes critical in determining the sensory qualities of meat such as softness and palatability.
The study also bridges the gap between genotype and phenotype by elucidating how genes and proteins involved in cytoskeletal organization and programmed cell death (apoptosis) correlate with muscle development parameters like the loin eye area (LEA). LEA, an internationally recognized indicator of muscle mass and carcass yield, was shown to be influenced by molecular networks governing structural cell components, highlighting important targets for breeding strategies aimed at maximizing meat yield without compromising quality.
Marbling, a trait synonymous with the tenderness, juiciness, and flavor of beef, was deconstructed at the molecular level in this study. The researchers identified a suite of proteins linked to fatty acid synthesis and lipid metabolism, alongside actin-binding proteins and factors modulating microtubule formation. These molecular players orchestrate intramuscular fat deposition, suggesting new avenues for enhancing the sensory profile of Nelore beef through informed genetic selection.
Moreover, the investigation illuminated genes linked to energy metabolism and muscle remodeling pathways as critical determinants of subcutaneous fat thickness—a trait intimately connected with carcass quality and consumer acceptance. These findings bolster the feasibility of developing molecular tools that predict and enhance this economically valuable phenotype with greater accuracy than traditional methods allow.
Brazil, responsible for exporting nearly 2.9 million tons of beef in 2024, predominantly raises Nelore cattle, a Zebuine breed renowned for its resilience but historically criticized for less tender meat compared to taurine breeds like the European Angus (Bos taurus taurus). This research confronts this challenge head-on by delivering an unprecedented molecular framework that could bridge the quality gap while leveraging the breed’s adaptability to tropical climates and its prominent footprint in global beef markets.
Importantly, the study moves beyond cataloguing genetic variants to elucidate their functional consequences at the transcript and protein levels. Dr. Larissa Fonseca, a co-supervisor and FAPESP scholarship recipient, stresses the complexity inherent in the path from DNA variant to phenotype, stating that variations in the genome do not invariably translate to changes in RNA or proteins due to regulatory mechanisms and biological checkpoints that are still being unraveled. Her work underscores the value of integrating multiple omics data streams to decode these complex regulatory circuits.
The outcomes of this research represent crucial stepping stones towards the design of next-generation genetic selection programs that are not solely reliant on markers but enriched by understanding the biological pathways influencing economically important traits. Through this approach, breeders can make more informed decisions to select animals that bring both yield and quality improvements, thus enhancing the overall competitiveness and sustainability of the Brazilian beef sector.
Future work by the UNESP team aims to deepen this multi-omics integration to refine predictive models for meat and carcass traits. By expanding datasets and employing increasingly sophisticated bioinformatic tools, the goal is to push the boundaries of accuracy in genomic selection, leading to tangible improvements in meat quality that could reverberate worldwide.
In a landscape where consumer expectations are rapidly evolving, and global competition intensifies, this study exemplifies the fusion of cutting-edge science and practical innovation. It provides a roadmap for leveraging molecular biology to meet the dual challenges of enhancing beef quality while maintaining the sustainability and productivity hallmarks of Zebu breed cattle in Brazil.
This work, published in Scientific Reports, carries significant implications beyond Brazil’s borders, potentially serving as a blueprint for other beef-producing nations seeking to harness multi-omics technologies to revolutionize animal breeding and food quality. As the beef industry faces pressure to meet demands for higher quality, traceability, and environmental responsibility, such integrative research offers a promising avenue to future-proof livestock production.
Brazil’s preeminence in the global beef market positions it uniquely to benefit from these scientific advances. Incorporating multi-omics insights into breeding programs stands to elevate the standard of Brazilian beef, ensuring it remains a preferred choice in international markets demanding both volume and excellence. The detailed molecular maps charted in this study form a critical foundation for innovation that marries genomic science with agricultural pragmatism.
Subject of Research: Identification of molecular markers and biological pathways for carcass and meat quality traits in Nelore cattle through multi-omics integration.
Article Title: Multi-omics integration identifies molecular markers and biological pathways for carcass and meat quality traits in Nellore cattle
News Publication Date: 26-Mar-2025
Web References:
– https://www.nature.com/articles/s41598-025-93714-x
– https://agencia.fapesp.br/28157
– https://apexbrasil.com.br/br/pt/conteudo/noticias/Brasil-bate-recorde-nas-exportacoes-de-carne-bovina-em-2024.html
– https://revistapesquisa.fapesp.br/en/cattle-genes/
References:
DOI: 10.1038/s41598-025-93714-x
Keywords: Cattle, Livestock, Farming, Food production
