Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Association between Numerical Variations of Vertebrae and Carcass Traits in Jeju Native Black Pigs, Landrace Pigs, and Crossbred F2 Population

제주재래흑돼지와 Landrace, 교배집단 F2에서 척추의 수적 변이와 도체형질의 상관관계

  • Cho, In-Cheol (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Kim, Sang-Keum (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Kim, Yoo-Kyung (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Kang, Yong-Jun (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Yang, Sung-Nyun (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Park, Yong-Sang (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Cho, Won-Mo (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Cho, Sang-Rae (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Kim, Nam-Young (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Chae, Hyun-Seok (Subtropical Animal Experiment Station, National Institute of Animal Science) ;
  • Seong, Pil-Nam (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Park, Beom-Young (Animal Products Research and Development Division, National Institute of Animal Science) ;
  • Lee, Jun-Heon (Department of Animal Science and Biotechnology, Chungnam National University) ;
  • Lee, Jae-Bong (Division of Applied Life Science, Gyeongsang National University) ;
  • Yoo, Chae-Kyoung (Division of Applied Life Science, Gyeongsang National University) ;
  • Han, Sang-Hyun (Educational Science Research Institute, Jeju National University) ;
  • Ko, Moon-Suck (Subtropical Animal Experiment Station, National Institute of Animal Science)
  • 조인철 (국립축산과학원 난지축산시험장) ;
  • 김상금 (국립축산과학원 난지축산시험장) ;
  • 김유경 (국립축산과학원 난지축산시험장) ;
  • 강용준 (국립축산과학원 난지축산시험장) ;
  • 양성년 (국립축산과학원 난지축산시험장) ;
  • 박용상 (국립축산과학원 난지축산시험장) ;
  • 조원모 (국립축산과학원 난지축산시험장) ;
  • 조상래 (국립축산과학원 난지축산시험장) ;
  • 김남영 (국립축산과학원 난지축산시험장) ;
  • 채현석 (국립축산과학원 난지축산시험장) ;
  • 성필남 (국립축산과학원 축산물이용과) ;
  • 박범영 (국립축산과학원 축산물이용과) ;
  • 이준헌 (충남대학교 축산학과) ;
  • 이재봉 (경상대학교 응용생명과학부) ;
  • 유채경 (경상대학교 응용생명과학부) ;
  • 한상현 (제주대학교 교육과학연구소) ;
  • 고문석 (국립축산과학원 난지축산시험장)
  • Received : 2013.04.10
  • Accepted : 2013.07.14
  • Published : 2013.07.30
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Abstract

The number of thoracic and lumbar vertebrae is known to be an unfixed trait among mammals. This study focused on the relationship between numerical variations of cervical (CER), thoracic (THO), and lumbar (LUM) vertebrae and the total number of vertebrae (TNV) and carcass traits in Jejunative black pigs (JBPs), Landrace pigs, and their intercrossed $F_2$ population. There were no numerical variations in CER vertebrae. On the other hand, the numbers of THO and LUM vertebrae and the TNV varied in all three populations. Of the traits investigated in the three populations, only the means${\pm}$SE of the LUM vertebrae did not show statistical significance (p>0.05). The carcass weights (CW), meat color (MC), marbling score (MS), backfat thickness (BFT), carcass length (CLE), THO vertebrae, and TNV all showed statistical significance (p<0.05). The JBP had 14-16 THO vertebrae, 5-6 LUM vertebrae, and 27-29 TNV. The Landrace pigs had 15-16 THO vertebrae, 5-7 LUM vertebrae, and 28-29 TNV. The $F_2$ population had 14-17 THO vertebrae, 5-7 LUM vertebrae, and 27-30 TNV. In the F2 population, increased numbers of THO vertebrae and TNV were associated with a significant increase in the CW, CLE, and BFT (p<0.05). In particular, the increase in the TNV was caused by an increase in the number of THO rather than LUM vertebrae. Although the animals with a greater number of THO and TNV had thicker backfat, they had a longer CLE and a heavier CW. Both these traits are economically more important than the level of backfat when determining the productivity level. These results suggest that genetic selection to increase the number of vertebrae, especially in Landrace pigs, JBPs, and their related populations, may be an excellent strategy for improving productivity.

포유류 중 돼지의 척추 중 요추, 흉추의 수는 고정되지 않은 형질로 개체간의 차이를 나타내는 것으로 알려져 있다. 본 연구는 제주재래흑돼지와 Landrace, 두 품종 간 $F_2$ 교배집단에서 경추 수, 흉추 수, 요추 수, 척추 수 등 체형관련 형질과 도체형질의 상관관계를 살펴보기 위해 수행되었다. 세 축군 모두 경추 수의 변이는 나타나지 않았으나, 흉추 수, 요추 수, 척추 수는 상이한 양상을 보였다. 도체형질의 성적과 요추 수만이 세 축군들 사이에서 통계적인 유의성을 나타내지 않았고(p>0.05), 도체중, 육색, 근내지방도, 등심단면적, 등지방두께, 도체장, 흉추수, 척추 수 등은 통계적인 유의성을 나타내었다(p<0.05). 제주재래흑돼지는 흉추 수 14-16 개, 요추 수 5-6 개, 척추 수 27-29 개의 범위, Landrace는 흉추 수 15-16 개, 요추 수 5-7 개, 전체 척추 수 28-29 개, $F_2$ 교배집단은 흉추 수 14-17, 요추 수 5-7 개, 전체 척추 수 27-30 개로 확인되었다. $F_2$ 교배집단에서 흉추 수와 척추 수의 증가는 도체중, 도체장, 등지방두께의 평균이 유의적으로 다른 양상을 보인다(p<0.05). 또한 척추 수의 증가는 요추 수의 증가보다 흉추 수의 증가에 더 많은 영향을 받는 것으로 나타났다. 흉추 수 및 척추 수의 증가가 등지방두께를 점점 두껍게 만들기는 하지만, 도체중과 도체장 등 경제성을 결정하는 핵심적인 도체형질을 향상시킨다는 점은 추후 제주재래흑돼지나 Landrace 품종을 활용한 양돈산업에서 체형개선을 통한 생산성 증가를 유발할 수 있는 좋은 전략이 될 것으로 판단된다.

Keywords

References

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