title: Beef cattle in the year 2050.
abstract: In 2050, beef likely will be produced much as occurs currently, as (1) a by-product of dairying-cull cows and calves not needed as replacements; (2) intensively managed cattle in environments rich in feed resources; or (3) extensively managed cattle grazing land unsuitable for tillage, with calves often moving to richer feed environments. Genetic progress will continue to depend on information such as weaning weights, but in addition, genetic, epigenetic, and phenotypic information will be obtained from blood, hair, semen, and/or biopsies of embryos.Most cattle will be genetically modified for efficient growth, desirable carcass traits, and management traits such as disease resistance. Some strains of cattle will have Y-chromosome-dependent terminal cross traits; sexed semen thus will automatically result in males with terminal cross characteristics and females with maternally desirable traits. In most cases, mother cows will have shorter gestations and smaller frame sizes than currently to decrease nutrient requirements for maintenance. The cow herd may disappear with some intensively managed systems; with sexed semen, each female can replace herself with a female calf and then be fattened for slaughter. The flexibility of being a ruminant will continue to be exploited by using a variety of feedstuffs, some of which are otherwise of little value.
authors.affiliation: Animal Reproduction and Biotechnology Laboratory, Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA, george.seidel@colostate.edu.
authors.forename: George E
authors.initials: GE
authors.lastname: Seidel
mesh_terms: D000822:Animal Husbandry / Q000191:economics / Q000379:methods / Q000639:trends; D000818:Animals; D030801:Animals, Genetically Modified / Q000502:physiology*; D001947:Breeding / Q000379:methods* / Q000592:standards; D002417:Cattle; D005260:Female; D005544:Forecasting; D006801:Humans; D008297:Male; D008460:Meat; D040641:Quantitative Trait Loci / Q000502:physiology*