Page 35 of articles about genetics-reproduction

There is an unusual increase of the returns-to-oestrus at 31-39 days. The majority are due to sows previously negative to the pregnancy ultrasound testing, and the returns-to-oestrus happened before 42 days.

Clinical disease and outcome following PRRS infection has significant inherited components.

The use of two different feeds for the sows in the farrowing quarters is not always easy at a logistical level.

The weaning-to-service interval is a short but vital period regarding the productivity of the sow.

PCV2 vaccination of the gilts prior to insemination with PCV2 spiked-semen showed a clear decrease of viral load in the gilts as well as a much lower viral excretion that were compatible with foetus protection.

Does the complexity and expense of genomics mean that it will only be available to the major global pig breeding companies in the future? If the price of genotyping continues to reduce, it may be possible for medium and smaller size breeding companies to share funding and identify desired genotypes.

Knowing how to make the most of space in our farrowing rooms is a key point, not only when using foster sows, but also for increasing the age at weaning. The farrowing pen is the most expensive pen at the farm, and we must obtain the maximum possible efficiency out of it.

Which factors affect the WTSI? Among the factors with a biggest influence we have: inadequate intake during lactation, season of the year, and length of the lactation.

One of the greatest long-term potentials for genomic selection is to identify specific genes or genomic regions with a significant impact on pig health and to aid selection for disease resistance and/or disease tolerance.