These results demonstrate that a dietary n-6/n-3 fatty acid ratio of 4:1 could significantly decrease harmful lipid levels in the blood by controlling the mechanism of metabolic distribution via blood from triglyceride and phospholipid newly synthesized in the liver of cannulated rat.

The results of this research indicate that eggs from organic farming have a richer chemical composition in terms of the content of nutrients such as calcium, magnesium and zinc compared with eggs obtained from caged hens. Therefore, consumers purchasing eggs should consider the system in which the hens were reared, as eggs can be a valuable source of these elements in the diet.

The aim of this study was to evaluate the time to sexual maturity and the quality of the initial eggs of Japanese quail affected by in ovo injection of plants extracts: ginger, garlic, oregano and cinnamon. The in ovo use of medicinal herbs may considerably modify both the time of sexual maturity and the quality of the initial eggs of Japanese quail.

Selective breeding for milk production traits in sheep using molecular marker technology offers a possibility of selecting accurately elite ewes and rams for milk production traits at early age. Our findings suggest that ovine FABP4 has a role in the variation of the milk production traits which may be of economic importance to sheep farmers. Variation in this gene could potentially be used as gene markers for milk production traits if such associations exist.

Recombination generates genetic variation and thus affects selection efficiency. Using immunolocalization of recombination proteins at the spermatocytes of males of six chicken breeds, we revealed high recombination rates in the roosters belonging to modern cross-breeds and low recombination rates in those belonging to ancient local breeds. Apparently, the recombination rate decreases over generations due to a decrease in genetic heterogeneity driven by inbreeding and artificial selection.