Over the last decade, extensive research effort has been placed on developing methane
mitigation strategies in ruminants. Many disciplines on animal science disciplines have been …

A review is presented of the genetic and physiological aspects of growth, body composition
and feed efficiency in mice. The genetic parameters considered are: nature and extent of …

Divergent selection for heat production/loss (kcal· kg−. 75· d− 1), measured in 9-to 11-wk-old
male mice, was conducted for 15 generations. Heat loss was measured for 15 h on …

Divergent selection for heat loss (kcal· kg−. 75· d− 1), measured in 9-to 11-wk-old male mice,
was conducted for 15 generations. Selection for high (MH) and low (ML) heat loss and …

A pleiotropic pathway of correlated response of feed efficiency from selection for milk yield
has been inferred from a large genetic correlation coefficient. However, in studies to …

Three generations of upward selection for the egg mass/adult weight ratio were carried out
in Tribolium castaneum. The experiment involved five lines: E—selected for increased egg …

A single generation divergent selection study, replicated four times (1983, 1984, 1985, and
1986), was conducted to assess genetic differences between progeny of high and low feed …

Abstract 33 Large White (LW) and Piétrain♀♀ were fattened for 40 wk, starting at 69±10.3
and 68±8.3 days of age and at 25±6.2 and 29±4.2 kg body weight for the 2 breed types resp …

To determine if photoperiod and food intake influenced age and body composition at vaginal
opening (VO), 80 mice were exposed to either 18L: 6D (LL) or 6L: 18D (SL) and fed either …

Seven generations of divergent selection on a phenotypic index of net feed in mice
produced a realised heritability estimate of 0.27±0.07. Despite small negative genetic …