Genetics of crossbred sow longevity
نویسندگان
چکیده
منابع مشابه
Genetics of crossbred sow longevity.
The aim of this study was to estimate genetic parameters for longevity from Swedish crossbred sows to investigate the possibilities of selecting for this trait. Data were collected from 16 commercial piglet-producing herds, on crossbred (Landrace × Yorkshire) sows farrowing in the period 1 January 2001 to 31 December 2004. The data set with records on 10 373 sows was split into two sets accordi...
متن کاملBioeconomic evaluation of sow longevity and profitability.
Sow production indicators, including litter size, litter weight, and the length of time that sows remained in the herd (sow longevity), were used to characterize sow performance and profitability. Sow longevity and production records from 148,568 sows in 32 commercial herds from Central Illinois from January 1995 to May 2001 were analyzed using survival and repeatability models, respectively. T...
متن کاملCandidate Genes Associated with Sow Longevity
The economic efficiency of swine operations is always a topic of discussion for pork producers and allied industries especially now when feed grain prices are being pushed higher as the demand for bio-fuels increases. However, many factors outside of feed prices influence the breakeven costs and thus economic efficiency for swine operations. Of those additional factors, sow herd performance is ...
متن کاملNon-genetic factors influencing sow longevity
The way that sows are housed during gestation and lactation has moved towards more intensive systems so that sows can be more easily managed and production maximized. At a minimum, some of these factors have contributed to a decline in the productive life of sows in commercial pork production systems. A sow remaining in the breeding herd for fewer parities is likely to produce fewer pigs in her...
متن کاملDevelopmental factors that influence sow longevity.
The length of adult sow life is now recognized as both an economic and a welfare concern. However, there are no consistent definitions to measure sow longevity. This study assessed 6 different descriptions of longevity and determined their relationship with developmental performance factors. Longevity definitions included stayability (probability of a sow producing 40 pigs or probability of her...
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ژورنال
عنوان ژورنال: Animal
سال: 2009
ISSN: 1751-7311
DOI: 10.1017/s175173110900411x