The objective of this study was to quantify the effects of the Charolais-specific inactive myostatin allele on phenotypic means and genetic parameters of heifer breeding traits. Records were registered from 1996 to 2006 in 282 herds dedicated to the on-farm French Charolais purebred progeny test. Data consisted of 36,867 female calf records, including 17,518 inseminated heifers that were bred b...

This experiment was conducted to compare meat quality and carcass composition of a diverse sampling of sheep breeds. Finnsheep, Romanov, Dorper, White Dorper, Katahdin, Rambouillet, Suffolk, Texel, Dorset, and Composite (1⁄2 Columbia rams to 1⁄4 Hampshire × 1⁄4 Suffolk) rams were mated to mature Composite ewes. Lambs (n = 804) were reared intensively, grain fi nished, and serially harvested ove...

This experiment was conducted to compare meat quality and carcass composition of a diverse sampling of sheep breeds. Finnsheep, Romanov, Dorper, White Dorper, Katahdin, Rambouillet, Suffolk, Texel, Dorset, and Composite (½ Columbia rams to 1/4; Hampshire × 1/4; Suffolk) rams were mated to mature Composite ewes. Lambs (n = 804) were reared intensively, grain finished, and serially harvested over...

Experiments examining potential impacts of growth hormone (GH) transgenesis in fish typically use a single source strain and do not address differential strains different genetic backgrounds. Here, we examine the effects differing backgrounds when reared culture on transgenic nontransgenic coho salmon (Oncorhynchus kisutch) produced by mating sires from rivers with dams origin. We found signifi...

Context Cow survival measures the ability of cows to survive from current subsequent lactation. In addition economic gain, genetic selection for could improve animal welfare by increasing adaptability and resilience both environmental health challenges. However, is a complex trait because it results diverse range reasons culling herd. Consequently, accuracy predictions direct are often low. Aim...

The purpose of the research was to assess changes in lactation activity cows and their impact on level reproduction, as well study fluctuations with respect genetic environmental factors. A sample 807 various ages formed for study. were kept a commercial farm Kharkiv region, Ukraine. Data from DairyPlan C21 software used It revealed that parameters Wood curve model significantly influenced by c...

Abstract Sire selection for beef on dairy crosses plays an important role in livestock systems as it may affect future performance and carcass traits of growing finishing crossbred cattle. The phenotypic variation found has raised concerns from meat packers due to animals with type characteristics. use morphometric measurements help understand the structures sire progeny selecting greater perfo...

Various two-breed cross cow groups were mated to Charolais and Limousin bulls to produce a total of574 three-breed cross calves over a two-year period. Average birth weights were 81.2 Ib and 76.2 Ib for calves produced from Charolais and Limousin sires, respectively. Calving assistance was required for 12.4 percent ofCharolais-sired calves and 4.0 percent of the Limousin-sired calves. Charolais...

Reproductive performance in dairy cattle has declined over the last 50 years as an unintended consequence of selection for high milk yield. Since early 2000s, geneticists have released successive versions fertility estimated breeding values (EBV) to assist reversing this trend. At herd level, EBV can help managers accelerate improvements reproductive by acting a second criteria when used tandem...