Heritabilities of Certain Immature and Mature Body Measurements and Their Correlations with First-Lactation Production of Holstein Cows

Abstract

tteritabilities of body weight estimated from heart girth, height at withers, chest depth, and body length taken at three ages before calving, after first calving, and after five years of age, along with phenotypic and genetic correlations between these traits and first-lactation mature equivalent milk or milk fat yields of ttolstein cows were computed, tteritabilities and genetic correlations for precalving-age measurements were obtained from paternal-sister and also from daughter-dam resemblances. The remaining estimates were based on paternal-sister data. The analyses included 529 to 2,367 observations.