569
Genetic Structure of Quantitative Traits for Effective Feeding during the Growing to Finishing Phases in Landrace Pigs

Thursday, August 21, 2014
Posters (The Westin Bayshore)
Masaaki Taniguchi , National Institute of Agrobiological Sciences, Tsukuba, Japan
Aisaku Arakawa , National Institute of Agrobiological Sciences, Tsukuba, Japan
Kensuke Hirose , Zen-Noh Central Research Institute for Feed and Livestock, Kamishihoro, Japan
Satoshi Nikaido , Zen-Noh Livestock Co. Ltd, Shizukuishi, Japan
Toshimi Matsumoto , National Institute of Agrobiological Sciences, Tsukuba, Japan
Aiko Ishida , NARO Institute of Livestock and Grassland Science, Tsukuba, Japan
Tetsuya Ito , Zen-Noh Central Research Institute for Feed and Livestock, Kamishihoro, Japan
Kazuo Fukawa , Zen-Noh Central Research Institute for Feed and Livestock, Kamishihoro, Japan
Satoshi Mikawa , National Institute of Agrobiological Sciences, Tsukuba, Japan
Abstract Text: We investigated the genetic structure and quantitative trait loci (QTLs) for economically important traits for the effective use of feed in Landrace pigs. Phenotypic data on feeding behaviors were measured with feed-intake recording equipment during the growing (30 to 70 kg) to finishing (70 to 105 kg) phases. Genetic parameters were estimated by using a multiple-trait animal model. QTLs were detected by a genome-wide association study (GWAS) based on Bayes C. Differentially estimated genetic correlations for feed efficiency traits between the growing and finishing phases suggested that different genetic factors accounted for these traits. Likewise, the GWAS results revealed that single nucleotide polymorphism markers with relatively high genetic variance were separately detected by trait, as well as by feeding phase. Our results suggest that using DNA markers may help to effectively breed pigs that grow or fatten fast with less feed.

Keywords:

Genome-wide association study

Pig

Residual feed intake

See more of: Posters: Genetics of Trait Complexes - Feed Intake and Efficiency (Group 2)
See more of: Genetics of Trait Complexes: Feed intake and efficiency
<< Previous Abstract | Next Abstract >>