SIRE EVALUATION AND GENETIC TRENDS

• DOI: 10.1093/ansci/1973.symposium.10
• Publication Date: 2018-01-05T08:38:47Z
• Authors: C. R. Henderson
• Keywords: Sire; Wright; Sample (material)

Sire evaluation can logically be formulated as a process of prediction future progeny sire produced by matings with specified females and making their records in some environment. Sewall Wright (1931) over 40 years ago suggested three types that might interest: (1) particular mating, (2) daughters the same herd but out new sample dams, (3) random dams breed. Dr. Lush early 1931 had elucidated principles evaluation, (1931 (1933). As was pointed Lehman (1961), two selection problems have been studied statisticians. These are Model I II selection, analagous to corresponding models analysis variance. In candidates for fixed, example, choices made among treatments, observations having taken on each fixed treatment. No really unified theory has developed this type selection. contrast, involves regarded from population. represents classical problem animal breeding essentially solved 1930's. Smith's (1936) application plant and, particular, Hazel's (1943) formalized techniques. A third apparently overlooked both statisticians breeders