TY - JOUR
T1 - Genetic parameters for feed efficiency traits and their relationships with growth and carcass traits in Duroc pigs
AU - Hoque, M. A.
AU - Suzuki, K.
AU - Kadowaki, H.
AU - Shibata, T.
AU - Oikawa, T.
PY - 2007/6/1
Y1 - 2007/6/1
N2 - Summary Genetic parameters for feed efficiency traits of 380 boars and growth and carcass traits of 1642 pigs (380 boars, 868 gilts and 394 barrows) in seven generations of Duroc population were estimated. Feed efficiency traits included the feed conversion ratio (FCR), and nutritional (RFInut), phenotypic (RFIphe) and genetic (RFIgen) residual feed intake. Growth and carcass traits were the age to reach 105-kg body weight (A105), loin eye muscle area (EMA), backfat (BF), intra-muscular fat (IMF) and meat tenderness. The mean values for RFIphe and RFIgen were close to zero and for RFInut was negative. All the measures of feed efficiency were moderately heritable (h2 = 0.31, 0.38, 0.40 and 0.27 for RFInut, RFIphe, RFIgen and FCR respectively). The heritabilities for all growth and carcass traits were moderate (ranged from 0.37 to 0.45), except for BF, which was high (0.72). The genetic correlations of RFIphe and RFIgen with A105 were positive and high. Measures of RFI were correlated negatively with EMA. BF was more strongly correlated with measures of RFI (rg ≥ 0.73) than with FCR (rg = 0.52). Selection for daily gain, EMA, BF and IMF caused favourable genetic changes in feed efficiency traits. Results of this study indicate that selection against either RFIphe or RFIgen would give a similar correlated response in carcass traits.
AB - Summary Genetic parameters for feed efficiency traits of 380 boars and growth and carcass traits of 1642 pigs (380 boars, 868 gilts and 394 barrows) in seven generations of Duroc population were estimated. Feed efficiency traits included the feed conversion ratio (FCR), and nutritional (RFInut), phenotypic (RFIphe) and genetic (RFIgen) residual feed intake. Growth and carcass traits were the age to reach 105-kg body weight (A105), loin eye muscle area (EMA), backfat (BF), intra-muscular fat (IMF) and meat tenderness. The mean values for RFIphe and RFIgen were close to zero and for RFInut was negative. All the measures of feed efficiency were moderately heritable (h2 = 0.31, 0.38, 0.40 and 0.27 for RFInut, RFIphe, RFIgen and FCR respectively). The heritabilities for all growth and carcass traits were moderate (ranged from 0.37 to 0.45), except for BF, which was high (0.72). The genetic correlations of RFIphe and RFIgen with A105 were positive and high. Measures of RFI were correlated negatively with EMA. BF was more strongly correlated with measures of RFI (rg ≥ 0.73) than with FCR (rg = 0.52). Selection for daily gain, EMA, BF and IMF caused favourable genetic changes in feed efficiency traits. Results of this study indicate that selection against either RFIphe or RFIgen would give a similar correlated response in carcass traits.
KW - Genetic parameters
KW - Growth and feed efficiency
KW - Pigs
KW - Selection response
UR - http://www.scopus.com/inward/record.url?scp=34249796652&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249796652&partnerID=8YFLogxK
U2 - 10.1111/j.1439-0388.2007.00650.x
DO - 10.1111/j.1439-0388.2007.00650.x
M3 - Article
C2 - 17550351
AN - SCOPUS:34249796652
VL - 124
SP - 108
EP - 116
JO - Journal of Animal Breeding and Genetics
JF - Journal of Animal Breeding and Genetics
SN - 0931-2668
IS - 3
ER -