Page 31 of articles about genetics-reproduction

A minimum age is proposed for young boars to qualify for selection, or alternatively, age-related semen quality thresholds in young boars should be established.

The findings point to the existence of individual genetic susceptibility to this syndrome.

Sow dietary supplementation with aniseed extract during late gestation and lactation improves milk yield and litter performance.

In conclusion, premature births increase the number of intra-partum deaths and result in lower birthweights, the presence of apnoea, and severe metabolic alterations in piglets.

Diet deprivation and subsequent over-allowance during gestation does not impair postnatal piglet growth.

This study evaluated the effect of full physical boar exposure at different stages of lactation on the incidence of lactation oestrus in both primiparous and multiparous sows.

In conclusion, a greater PRL/P4 ratio 24 h prepartum, characterized by lower P4 concentrations and a trend for greater PRL concentrations peripartum, led to increased colostrum yield in primiparous sows.

Our results suggest that at least at the chosen stocking densities, parity and space allocation have minimal effect on a number of commonly-used welfare measures.

On the basis of the presented results, it should be noted that the use of oxytocin into insemination doses improves the farrowing rate and other parameters of the reproductive performance of sows.

High PBA in parity 1 can be used to predict that a sow will have high reproductive performance and lifetime performance.

These results indicate that AI using 2.0 × 109 FTS can result in acceptable pregnancy rates and litter sizes but with no measurable benefit for addition of prostaglandin.

Magnesium supplementation can increase reproductive performance in adult sows.