Summary and Implications
Sow feed intake and efficiency during lactation is an important component associated with sow productivity,longevity and efficiency, which are important traits for pork producers. The difficulty in collecting accurate phenotypes that are required to estimate lactation efficiency, and the high replacement rate of sows in the nucleus herds, highlight the importance of using genomic tools to examine the underlying genetics of these traits. The goal of this project was to conduct genome wide association studies of traits related to lactation efficiency on sows from the ISU RFI selection lines using the 60k SNP marker chip. More than 80 regions across the genome that explained at least 1% of the genetic variance of the traits under study were identified. These results can provide an effective resource to future research and application to marker assisted or genomic selection to improve sow productivity and efficiency.
Iowa State University
Thekkoot, Dinesh M.; Young, Jennifer M.; Du, Zhiqiang; Onteru, Suneel; Rothschild, Max F.; and Dekkers, Jack C.M.
"Whole Genome Association Study for Lactation Feed Efficiency in Yorkshire Sows Selected for Residual Feed Intake during Finishing,"
Animal Industry Report:
AS 659, ASL R2821.
Available at: http://lib.dr.iastate.edu/ans_air/vol659/iss1/72