Young rats from birth were given a maximum milk supply by rotating the litter between 3
mothers at 8-h intervals or one mother was made to feed 6, 12 or 18 young. The young had …

Three lines of mice differing in body weight and ovulation rate were compared under three
levels of feed intake to study the importance of genotype-environment interactions for …

Improvement in feed efficiency when selection is based on gain: feed ratio has often been
accompanied by a reduction in feed intake. The following four criteria were used in mass …

Litters of Osborne-Mendel (OM) pups were reduced to eight each at birth and suckled by OM
dams; the latter were fed either a high fat (60% w/w) or a grain (3% fat, w/w) ration during …

Live weight gain and weight for age are among the most important of economic traits in farm
animals, and this may, in part, have been the motivation for the considerable volume of work …

Experimental animal breeding is to livestock improvement what experimental medicine is to
medical science-the only firm foundation. Good experimentation, however, requires …

Six lines of mice were fed distinctive fixed or shifting diets while being selected for fast
growth in the first two weeks after weaning. The intention was to provide alternative routes …

Male rats, placed in litters of 2, 4, 8, 12 and 16 on the first postnatal day, were weighed at 3-
day intervals and killed at days 21 or 58. The carcasses were assayed for total protein, DNA …

Correlated responses to selection for rapid 3 to 6-wk postweaning gain in male mice were
estimated for five fat depots weighed at specific degrees of maturity in body weight (37.5 …

In the accompanying paper, specific genetic factors for body weight and food intake were
identified in non-reproductive male and female mice of a line selected for high litter size at …