Effects of Breeds and Environmental Factors on Certain Postweaning Traits in Swine

돼지의 이유후형질(離乳後形質)에 미치는 품종(品種) 및 환경(環境)의 효과(效果)

  • Sang, Byong Chan (Dept. of Dairy Science, College of Agriculture, Chungnam National University) ;
  • Han, Sung Wook (Dept. of Animal Science, College of Agriculture, Chungnam National University) ;
  • Chung, Hong Ki (Chungnam Province Animal Breeding Station)
  • 상병찬 (충남대학교 농과대학 낙농학과) ;
  • 한성욱 (충남대학교 농과대학 축산학과) ;
  • 정홍기 (충남 도립 종축장)
  • Published : 1993.06.30

Abstract

This study was conducted to determine the main effect of the breed, parity, forrowing year and month on average daily gain, feed efficiency, backfat thickness, age at 90 Kg body weight and selection index. The data analysis were the record of 115 male pigs producted from Landrace. Large Yorkshire and Duroc purebreds tested at Chungnam Province Animal Breeding Station from 1986 to 1990. The results obtained are summarized as follows : 1. The breed average of daily gain, feed efficiency, backfat thickness, age at 90Kg body weight and selection index were $922.25{\pm}17.2$g, $2.85{\pm}0.04$, $2.03{\pm}0.04$cm, $135.44{\pm}1.38$ days and $168.33{\pm}2.42$, respectively. 2. The effect of breed was highly significant at 1% level in average daily gain, age at 90Kg body weight and selection index, and significant at 5% level in backfat thickness. Among the purebreds, Duroc was superior in average daily gain, age at 90Kg body weight and selection index with 977.22g, 132.47 days and 172.35, respectively. But Large Yorkshire was 1.95cm thiner than other breeds in backfat thickness. 3. The effect of parity was highly significant at 1% level in average daily gain, and significant at 5% level in backfat thickness and selection index. Among the parity, the 3rd and 4th parity were superior in average daily gain and selection index with 974.92g 177.61, 959.48g and 177.84, respectively. 4. The effect of forrowing year was highly significant at 1% level in average daily gain, feed efficiency and selection index, and that of forrowing month was highly significant at 1% level in average daily gain, and significant at 5% level in backfat thickness and selection index, respectively. Among the forrowing month, March was superior in average daily gain and selection index with 968.22g and 174.54, respectively.

본 연구(硏究)는 1986년부터 1990년까지 충청남도(忠淸南道) 도립종축장(道立種畜場)에서 사육된 Landrace, Large Yorkshire 및 Duroc종의 후보종 모돈 115두의 이유후 형질(形質)에 대한 능력검정(能力檢定) 자료를 근거로 최소자승법을 이용하여 품종(品種), 산차(産差), 분만년도(分娩年度) 및 분만월(分娩月)이 일당증체량(日當增體量), 사료요구율, 등지방층두께, 90kg도달일령 및 선발지수에 미치는 효과(效果)를 추정(推定)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 이유후형질(形質)의 전체평균은 일당증체량(日當增體量), 사료요구율, 등지방층두께, 90kg도달일령 및 선발지수(選拔指數)에서 각각 $922.25{\pm}17.25$g, $2.85{\pm}0.04$, $2.03{\pm}0.04$cm, $135.44{\pm}1.38$일 및 $168.33{\pm}2.42$이었다. 2. 품종의 효과(效果)에 있어서는 일당증체량(日當增體量), 90kg도달일령 및 선발지수(選拔指數)에서 고도의 유의차(有意差)(P<0.01)가 인정되었으며, 등지방두께에 있어서도 유의차(P<0.05)가 나타났다. 품종별로는 Duroc종이 일당증체량(日當增體量), 90Kg도달일령및 선발지수(選拔指數)에서는 각각 977.23g, 132.47일 및 172.35로 가장 우수하였고, 등지방층두께는 Landrace종이 1.95cm로 가장 얇었다. 3. 산차(産差)의 효과(效果)에 있어서 일당증체량(日當增體量)은 고도의 유의차(有意差)(P<0.01)가 인정되었으며, 등지방층두께 및 선발지수(選拔指數)에서도 유의차(有意差)(P<0.05)가 인정되었고, 산차(産差)로는 일당증체량(日當增體量) 및 선발지수(選拔指數)가 3산차(産差)와 4산차(産差)에서 각각 974.92g, 177.61, 959.48g 및 1774.84로 가장 우수하였다. 4. 분만년도의 효과(效果)에 있어서는 일당증체량(日當增體量), 사료요구율 및 선발지수(選拔指數)에서 고도의 유의차(P<0.01)가 인정되었으며, 분만월에 있어서도 일당증체량(日當增體量)에서 고도의 有意差(P<0.01)가 인정되었고, 등지방층두께 및 선발지수(選拔指數)에서는 유의차(有意差)(P<0.05)가 있었으며, 분만월별로는 3월분만이 일당증체량 및 선발지수(選拔指數)에서 각각 968.22g, 174.54로 가장 우수하였다.

Keywords