Earticle

초록

영어

The objective of thisstudy was to estimate genetic parameters on days to 90 kg body weight and ultrasound measured traits (back fat thickness, eye muscle area, retail cut percentage) and predict genetic progress when the weights for selection on the paternal traits of Duroc, which can be incorporated into sire line selection indexes. A simulation program, ZPLAN+, was used for the simulation. Genetic parameters of days to 90 kg body weight (D90KG), back fat thickness (BFT), eye muscle area (EMA) and retail cut percentage (RCP) used in the simulation were estimated from 27,972 heads of farm tested Duroc pigs from 2005 to July, 2012. Parameters of simulation used genetic parameters with parturition rates, ratios of test pigs and replacement rates that were dependent on selection protocols of simulated farms. Different weights of selection for traits of days to 90 kg and backfat thickness were compared. Estimates of heritability were 0.406, 0.355, 0.159 and 0.379 for D90KG, BFT, EMA and RCP, respectively. Genetic correlation of D90KG with BFT, EMA and RCP were –0.043, 0.049 and 0.021, respectively. Genetic correlation of BFT with EMA and RCP were –0.394 and –0.937. And genetic correlation between EMA with RCP were 0.524. Simulation result showed that index weight of 3:1 on D90KG and BFT was effective to shorten days to 90 kg without any significant changes in backfat thickness. Generally the genetic changes were greater as parturition rate and ratios of test pigs increased. Increase in replacement rate had a small effect on genetic changes in negative way. Thus, we recommend that index weight of 3:1 on days to 90 kg and backfat thickness could be utilized for sire line selection.

목차

ABSTRACT1
 Ⅰ. 서론
 Ⅱ. 재료 및 방법
  1. 공시재료
  2. 통계 분석 방법
 Ⅲ. 결과 및 고찰
 Ⅳ. 요약
 사사
 Ⅴ. REFERENCES

저자

• 고대영 [ Daeyoung Koh | 농촌진흥청 국립축산과학원 ]
• 최태정 [ Taejeong Choi | 농촌진흥청 국립축산과학원 ]
• 최연호 [ Yunho Choy | 농촌진흥청 국립축산과학원 ]
• 김시동 [ Sidong Kim | 농촌진흥청 국립축산과학원 ]
• 박병호 [ Byoungho Park | 농촌진흥청 국립축산과학원 ]
• 조충일 [ Chungil Cho | 농촌진흥청 국립축산과학원 ]
• 조광현 [ Kwanghyun Cho | 농촌진흥청 국립축산과학원 ]
• 이승수 [ Seungsoo Lee | 농촌진흥청 국립축산과학원 ]
• 최재관 [ Jaegwan Choi | 농촌진흥청 국립축산과학원 ] Corresponding author

참고문헌