CROSSBREEDING EFFECTS IN PRACTICAL PIG PRODUCTION

Breed Use and Crossbreeding in Goat Production

Genetic parameters and crossbreeding effects of fat deposition and fatty acid profiles in Iberian pig lines.

The aim of this study was to estimate the genetic and environmental parameters and crossbreeding effects on fatty acid and fat traits in the Iberian pig. Our final goal is to explore target selection traits and define crossbreeding strategies. The phenotypes were obtained under intensive management from 470 animals in a diallelic experiment involving Retinto, Torbiscal, and Entrepelado lines. T...

Practical Crossbreeding Programs for Beef Cattle in Florida

Introduction While there are many types of crossbreeding systems possible, the ones most likely to be useful and practical for use in Florida are some form of a rotational crossbreeding system or, in small herds and a few specialized systems, a terminal crossbreeding program. A third option, the rota-terminal, combines both systems and could also be considered for more intensively managed opera...

Crossbreeding for dairy production in the lowland tropics of Kenya I. Estimation of individual crossbreeding effects on milk production and reproductive traits and on cow live weight

Crossbreeding parameters for milk production and reproductive traits and for cow live weight (LW) of crosses of Ayrshire (A), Brown Swiss (B), Friesian (F) and Sahiwal (S) cattle were estimated using data from a dairy herd in the lowland coastal tropics of Kenya. An individual animal model was fitted to the data to estimate the breed cross means of 25 genotypes. The means were then regressed on...

Evaluation of Crossbreeding Effects for Wool Traits in Sheep

Crossbreeding effects for wool quality traits viz. greasy fleece weight (kg), staple length (cm), average fibre diameter (μ) and medulation percentage were estimated using the Dickerson’s and Kinghorn’s models. The data analyzed involved 15 genetic groups including Nali purebred, F1’s of two and three breeds, F2’s and reciprocal crossbred obtained from the crossing of Nali (N), Merino (M) and C...