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Genetic Associations of Farrowing Length in Two Maternal Lines of Pigs

Thursday, August 21, 2014: 4:45 PM
Bayshore Grand Ballroom B-C (The Westin Bayshore)
Ricardo Zanella , EMBRAPA Swine and Poultry, Concórdia, Brazil
Adriana M.G. Ibelli , EMBRAPA Swine and Poultry, Concórdia, Brazil
Jane O. Peixoto , EMBRAPA Swine and Poultry, Concórdia, Brazil
Maurício E. Cantão , EMBRAPA Swine and Poultry, Concórdia, Brazil
Marcos V. G. B. da Silva , Embrapa Dairy Cattle, Juiz de Fora, Brazil
Poliana F. Giachetto , Embrapa Agricultural Informatics, Campinas, Brazil
Marcelo Freitas , BRF S/A, Curitiba, Brazil
Jader Lopes , BRF S/A, Curitiba, Brazil
Mônica C. Ledur , EMBRAPA Swine and Poultry, Concórdia, Brazil
Recorded Presentation (mp4)
Abstract Text:

Reproductive success has a direct impact on the economy and profitability of pork production. Prolonged farrowing is negatively correlated with number of piglets born alive and decreased fertility in subsequent breeding-season. To better understand the genetics involved with birth traits, a genome-wide-association-study was conducted to identify SNPs associated with farrowing length (FL) in two swine breeds. Five chromosomal regions involved with FL were identified using the additive/additive+dominance models in Landrace breed: on SSC0/SSC1/SSC2/SSC4/SSC13, and two regions on SSC15 when the additive+dominance model was tested. For the Large White breed, four regions (SSC4/SSC9/SSC12/SSCX) were associated with FL using the additive/additive+dominance models. When tested the additive+dominance effects, five chromosomal regions were associated with FL: on SSC0/SSC1/SSC4/SSC5/SSC6. Identification of markers associated with FL might unravel genes involved with birth traits. Hence, genetic selection can be applied to optimize farrowing time, according to the desirable breeding goals.

Keywords:

GWAS

farrowing length

swine

See more of: Swine Genomics and Difficult Traits
See more of: Species Breeding: Swine
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