Factors Affecting the Production and Reproduction Performance of Tropically Adapted Beef Cattle in Southern Africa

Tick Burdens of Tropically Adapted Beef Cattle as Influenced by Selected Physical and Production Traits

Meeting Domestic and Export Markets for Beef: Research Outcomes of the Cattle and Beef CRC, 1993-2000

The CRC program was designed to understand the genetic and non-genetic factors affecting beef quality. This contract presents an overview of the CRC’s progeny tests for beef quality traits and net feed intake. There is scope for significant genetic improvement of retail beef yield percentage and marbling in temperate and tropically adapted breeds, using crossbreeding and within-breed selection....

Relationship between Scrotal Circumference, Quantitative Testicular Traits and Growth Performance in Tropically Adapted Yearling Beef Bulls Differing in Age

Genome-wide association studies of female reproduction in tropically adapted beef cattle.

The genetics of reproduction is poorly understood because the heritabilities of traits currently recorded are low. To elucidate the genetics underlying reproduction in beef cattle, we performed a genome-wide association study using the bovine SNP50 chip in 2 tropically adapted beef cattle breeds, Brahman and Tropical Composite. Here we present the results for 3 female reproduction traits: 1) ag...

Genetic variants affecting meat and milk production traits appear to have effects on reproduction traits in cattle.

Polymorphisms located in the genes ABCG2, DGAT1, LEP, PRLR, RORC, CAPN1 and CAST previously have been associated with milk or meat production traits. In this study, these polymorphisms were examined for significant effects on reproductive traits [age at puberty (AGECL), post-partum anoestrus interval (PPAI) and the ability ovulate prior to weaning (PW)] and on a panel of correlated traits such ...