Correlated responses in reproductive and carcass traits were studied in 181 litters and 218 pigs from a line of Landrace pigs selected six generations for increased weight at 70 d of age and a contemporaneous, randomly selected control line. The reproductive and maternal traits studied included litter sizes born, born alive, and alive at 21 d and litter weight at birth and at 21 d. Carcass trai...

Laboratory selection for resistance to starvation has been conducted under relatively controlled conditions to investigate direct and correlated responses to artificial selection. With regard to starvation resistance, there are three physiological routes by which the trait can evolve: resource accumulation, energy conservation and starvation tolerance. A majority of energetic compounds and macr...

Kibite and Edney, 1998; Cervantes-Martinez et al., 2001). Cervantes-Martinez et al. (2001) conducted one cycle Oat (Avena sativa L.) -glucan lowers serum cholesterol in huof phenotypic selection of individual S0 plants for greater mans. Thus, enhancing its content in oat cultivars for human consumption is desirable. Phenotypic selection for greater -glucan content -glucan content in two genetic...

Hemolymph juvenile hormone esterase (JHE) activity on the third day of the last stadium in the cricket, Gryllus assimilis, exhibited a significant response to selection in each of six replicate lines. Mean realized heritability was 0.26 +/- 0.04. The response was due to changes in whole-organism enzyme activity as well as to changes in the proportion of enzyme allocated to the hemolymph compart...