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SNP-based and pedigree-based estimation of heritability and maternal effect for body weight traits in an F2 intercross between Landrace and Jeju native black pigs

제주재래흑돼지와 랜드레이스 F2 교배축군의 생체중에 대한 유전체와 가계도 기반의 유전력 및 모체효과 추정

  • Park, Hee-Bok (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Han, Sang-Hyun (Educational Science Research Institute, Jeju National University) ;
  • Lee, Jae-Bong (Korea Zoonosis Research Institute, Chonbuk National University) ;
  • Kim, Sang-Geum (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Kang, Yong-Jun (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Shin, Hyun-Sook (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Shin, Sang-Min (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Kim, Ji-Hyang (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Son, Jun-Kyu (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Baek, Kwang-Soo (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Cho, Sang-Rae (Hanwoo Research Institute, National Institute of Animal Science, RDA) ;
  • Cho, In-Cheol (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA)
  • 박희복 (국립축산과학원난지축산연구소) ;
  • 한상현 (제주대학교교육과학연구소) ;
  • 이재봉 (전북대학교인수공통전염병연구소) ;
  • 김상금 (국립축산과학원난지축산연구소) ;
  • 강용준 (국립축산과학원난지축산연구소) ;
  • 신현숙 (국립축산과학원난지축산연구소) ;
  • 신상민 (국립축산과학원난지축산연구소) ;
  • 김지향 (국립축산과학원난지축산연구소) ;
  • 손준규 (국립축산과학원난지축산연구소) ;
  • 백광수 (국립축산과학원난지축산연구소) ;
  • 조상래 (국립축산과학원한우연구소) ;
  • 조인철 (국립축산과학원난지축산연구소)
  • Received : 2016.09.05
  • Accepted : 2016.09.30
  • Published : 2016.09.30

Abstract

Growth traits, such as body weight, directly influence productivity and economic efficiency in the swine industry. In this study, we estimate heritability for body weight traits usinginformation from pedigree and genome-wide single nucleotide polymorphism (SNP) chip data. Four body weight phenotypes were measured in 1,105 $F_2$ progeny from an intercross between Landrace and Jeju native black pigs. All experimental animals were subjected to genotypic analysis using PorcineSNP60K BeadChip platform, and 39,992 autosomal SNP markers filtered by quality control criteria were used to construct genomic relationship matrix for heritability estimation. Restricted maximum likelihood estimates of heritability were obtained using both genomic- and pedigree- relationship matrix in a linear mixed model. The heritability estimates using SNP information were smaller (0.36-0.55) than those which were estimated using pedigree information (0.62-0.97). To investigate effect of common environment, such as maternal effect, on heritability estimation, we included maternal effect as an additional random effect term in the linear mixed model analysis. We detected substantial proportions of phenotypic variance components were explained by maternal effect. And the heritability estimates using both pedigree and SNP information were decreased. Therefore, heritability estimates must be interpreted cautiously when there are obvious common environmental variance components.

Keywords

Acknowledgement

Grant : 제주재래돼지 기반 합성 종개량을 위한 계통조성돈 유지 및 개발

Supported by : 국립축산과학원

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