The purpose of this study was to estimate the heritability of scrotal circumference (SC) and semen traits, genetic correlations between SC and semen quality traits, and the effect of cytoplasmic line on SC and semen traits. Breeding soundness exam (BSE) data were collected on registered Angus bulls at 4 ranches over 7 yr. The American Angus Association provided historical pedigree information t...

Abstract Flow cytometry has been used as a reliable and objective tool for bull sperm quality assessments identification of sub-fertility. Our was to determine if breed differences exist in using flow when evaluating semen from yearling Angus Charolais bulls that passed breeding soundness exam (BSE) evaluation thresholds. Ejaculates were collected via electroejaculation on one three consecutive...

The communal grazing system is generally understood to have a low input, low output type of management. However, the actual inputs and outputs of the farmers are not well known and the farmers are often unaware of their problems. Although the causes of low calving percentage are well understood in commercial beef farming enterprises in South Africa, the same is not true for communal farming sys...

There is concern in the beef industry that selecting bulls for feed efficiency based on residual feed intake (RFI) may have a negative impact on bull reproductive performance and fertility. Here we investigated the impact of selection of bulls for low RFI on breeding soundness evaluation (BSE), reproductive performance, and fertility of bulls under natural service in multisire mating groups on ...

Aim of this study was to select superior rams by assessing their scrotal size and quality semen. In ten indigenous Bangladeshi rams, the body weight, circumference, volume increased with age (P<0.05). Body weight at 381-410 days (13.6 ± 1.5 kg) higher than 169-200 (10.2 0.1 201-230 (10.4 1.2 (p<0.05). Scrotal circumference 381 - 410 (19.1 0.3 cm) (p<0.05) 169 200 (17.2 cm), 201 230 0.6...