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Improving Genetic Evaluation of Litter Size Using a Single-step Model

Friday, August 22, 2014: 2:45 PM
Bayshore Grand Ballroom A (The Westin Bayshore)
Xiangyu Guo , Center for Quantitative Genetics and Genomics, Department of Molecular Biology and Genetics, Aarhus University, Tjele, Denmark
Ole Fredslund Christensen , Center for Quantitative Genetics and Genomics, Department of Molecular Biology and Genetics, Aarhus University, Tjele, Denmark
Tage Ostersen , Pig Research Centre, Copenhagen, Denmark
Daniel Alberto Sørensen , Center for Quantitative Genetics and Genomics, Department of Molecular Biology and Genetics, Aarhus University, Tjele, Denmark
Yachun Wang , College of Animal Science and Technology, China Agricultural University, Beijing, China
Mogens Sandø Lund , Center for Quantitative Genetics and Genomics, Department of Molecular Biology and Genetics, Aarhus University, Tjele, Denmark
Guosheng Su , Center for Quantitative Genetics and Genomics, Department of Molecular Biology and Genetics, Aarhus University, Tjele, Denmark
Recorded Presentation (mp4)
Abstract Text: A recently developed single-step method allows genetic evaluation based on information from phenotypes, pedigree and markers simultaneously. This paper compared reliabilities of predicted breeding values obtained from single-step method and the traditional pedigree-based method for two litter size traits, total number of piglets born (TNB), and litter size at five days after birth (LS5) in Danish Landrace and Yorkshire pigs. The results showed that the single-step method combining phenotypic and genotypic information provided more accurate predictions than the pedigree-based method, not only for genotyped animals but also for non-genotyped animals.

Keywords:

single-step model

litter size

pig

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