title: Considerations related to breed or biological type.
abstract: This article reviews the literature on breed, biological type, and breeding system and their impact on female fertility, especially as they relate to heifer development. The attributes of different breeding systems and their appropriate use is discussed. In addition, the extant and emerging selection tools that are available for replacement heifer selection are reviewed.
authors.affiliation: Department of Animal Science, University of California, One Shields Avenue, Davis, CA 95616, USA. Electronic address: alvaneenennaam@ucdavis.edu.
authors.forename: Alison L
authors.initials: AL
authors.lastname: Van Eenennaam
mesh_terms: D000822:Animal Husbandry / Q000191:economics / Q000379:methods; D000818:Animals; D001947:Breeding / Q000191:economics / Q000379:methods*; D002417:Cattle / Q000235:genetics* / Q000254:growth & development / Q000502:physiology*; D005260:Female; D019649:Food Industry; D006823:Hybrid Vigor; D008460:Meat; D012741:Sexual Maturation / Q000502:physiology
keywords: Biological type; Breed; Complementarity; Crossbreeding; Expected progeny difference (EPD); Genomics; Heterosis