UK observations on lost genetic potential and future possibilities for improved sow performance

There are indications that progress in litter size may be increasing as programmes put more emphasis on reproduction traits and the use of BLUP with minimal inbreeding becomes more widespread. While growth rate, lean growth and feed conversion continue to show significant progress there is some evidence that selection against backfat is decreasing as programmes switch emphasis towards reproduction and ‘meat’ traits. At the same time, various techniques such as selection index manipulation and selection on components traits should be halting the long-term decline in feed intake.