Feed intake of sows during lactation has genetic relationships with growth and lifetime performance of sows
نویسندگان
چکیده
Pig breeders have successfully selected for higher litter size, reduced backfat and improved growth rate (Hermesch, 2006). These outcomes imply that modern sows have higher nutrient demands in comparison to sows of 20 years ago. For example, genetic improvement of litter size has been 0.10 to 0.20 piglets per year in maternal lines. This implies that sows need to eat 50 to 100 grams more feed per day during lactation assuming the requirement of 0.5 kg feed per day per piglet.
منابع مشابه
Genetic Analysis of Feed Intake in Lactating Sows
Records for daily feed intake during lactation were available for 774 sows with 2,234 litters farrowing from May 2002 to November 2006. Genetic parameters were estimated for whole-oflactation feed intake and feed intake averaged over 5-day periods during lactation. Estimates of heritabilities and the permanent environment of the sow were 0.16±0.05 and 0.18±0.04 for total lactation feed intake a...
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During lactation, sows need to eat a sufficient amount of feed to meet the requirements of milk production to nurture their litter and to sustain their body condition. Overall, information about feed intake of lactating sows is limited. In addition, information about other factors influencing feed intake of the sow may be incomplete. These factors include feeding strategy, lactation length, lit...
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