Correlated responses of pre- and postweaning growth and backfat thickness to six generations of selection for ovulation rate or prenatal survival in French Large White pigs

2007 ◽  
Vol 85 (12) ◽  
pp. 3209-3217 ◽  
Author(s):  
A. Rosendo ◽  
L. Canario ◽  
T. Druet ◽  
J. Gogué ◽  
J. P. Bidanel
Keyword(s):  
Ovulation Rate ◽  
Backfat Thickness ◽  
Correlated Responses ◽  
Large White ◽  
Selection For

Correlated responses for litter traits to six generations of selection for ovulation rate or prenatal survival in French Large White pigs

2007 ◽  
Vol 85 (7) ◽  
pp. 1615-1624 ◽  
Author(s):  
A. Rosendo ◽  
T. Druet ◽  
J. Gogué ◽  
L. Canario ◽  
J. P. Bidanel
Keyword(s):  
Ovulation Rate ◽  
Correlated Responses ◽  
Large White ◽  
Litter Traits ◽  
Selection For

scholarly journals Correlated Response on Growth Traits and Their Variabilities to Selection for Ovulation Rate in Rabbits Using Genetic Trends and a Cryopreserved Control Population

Animals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2591
Author(s):  
Rosa Peiró ◽  
Celia Quirino ◽  
Agustín Blasco ◽  
María Antonia Santacreu
Keyword(s):  
Growth Traits ◽  
Ovulation Rate ◽  
Control Population ◽  
Individual Growth ◽  
Correlated Response ◽  
Phenotypic Variance ◽  
Correlated Responses ◽  
Growth Variability ◽  
Selection For ◽  
Genetic Trends

The aim of this work was to estimate correlated responses in growth traits and their variabilities in an experiment of selection for ovulation rate during 10 generations in rabbits. Individual weight at 28 days old (IW28, kg) and at 63 days old (IW63, kg) was analyzed, as well as individual growth rate (IGR = IW63 − IW28, kg). The variability of each growth trait was calculated as the absolute value of the difference between the individual value and the mean value of their litter. Data were analyzed using Bayesian methodology. The estimated heritabilities of IW28, IW63 and IGR were low, whereas negligible heritabilities were obtained for growth variability traits. The common litter effect was high for all growth traits, around 30% of the phenotypic variance, whereas low maternal effect for all growth traits was obtained. Low genetic correlations between ovulation rate and growth traits were found, and also between ovulation rate and the variability of growth traits. Therefore, genetic trends methods did not show correlated responses in growth traits. A similar result was also obtained using a cryopreserved control population.

scholarly journals Selection for reduced muscle glycolytic potential in Large White pigs. II. Correlated responses in meat quality and muscle compositional traits

1999 ◽  
Vol 31 (1) ◽  
pp. 61 ◽  
Author(s):  
Catherine Larzul ◽  
Pascale Le Roy ◽  
Jean Gogué ◽  
André Talmant ◽  
Bernard Jacquet ◽  
...  
Keyword(s):  
Meat Quality ◽  
Correlated Responses ◽  
Large White ◽  
Glycolytic Potential ◽  
Selection For

scholarly journals Selection for ovulation rate in rabbits: Genetic parameters and correlated responses on survival rates1

2012 ◽  
Vol 90 (2) ◽  
pp. 439-446 ◽  
Author(s):  
P. Laborda ◽  
M. L. Mocé ◽  
A. Blasco ◽  
M. A. Santacreu
Keyword(s):  
Genetic Parameters ◽  
Ovulation Rate ◽  
Correlated Responses ◽  
Selection For

Carcass composition in pigs selected for components of efficient lean growth

1994 ◽  
Vol 1994 ◽  
pp. 15-15
Author(s):  
E.A. Bruce ◽  
N. D. Cameron ◽  
M.K. Curran
Keyword(s):  
Growth Rate ◽  
Divergent Selection ◽  
Carcass Composition ◽  
Correlated Responses ◽  
Large White ◽  
Lean Growth ◽  
Selection For

This study determined the correlated responses in carcass composition after four generations of divergent selection for components of efficient lean growth rate in Large White (LW) and Landrace (LR) pigs.

Selection for components of efficient lean growth rate in pigs 1. Selection pressure applied and direct responses in a Large White herd

1994 ◽  
Vol 59 (2) ◽  
pp. 251-262 ◽  
Author(s):  
N. D. Cameron
Keyword(s):  
Growth Rate ◽  
Divergent Selection ◽  
Correlated Response ◽  
Food Conversion ◽  
Correlated Responses ◽  
Direct Response ◽  
Large White ◽  
Selection For ◽  
The Difference ◽  
And Control

AbstractResponses to four generations of divergent selection for lean groivth rate with ad-libitum feeding (LGA), for lean food conversion (LFC) and for daily food intake (DFI) in Large White pigs were studied. The LGA (LFC) selection criterion was designed to obtain equal correlated responses in growth rate (food conversion ratio) and carcass lean content, measured in phenotypic s.d. The selection criteria had phenotypic s.d. of 27, 29 and 253 units, respectively, and results are presented in s.d. units. There was a total of 3537 pigs, with an average of 40 boars and 40 gilts performance tested in each of the high, low and control lines per generation and the lines consisted of 10 sires and 20 dams. The generation interval was equal to 13·5 months. Animals were performance tested in individual pens with mean starting and finishing weights of 30 kg and 85 kg respectively.Cumulative selection differentials in the three selection groups were 5·8, 3·6 and 3·3 phenotypic s.d. for LGA, LFC and DFI respectively. Direct responses to divergent selection were 1·7, 1·3 and 1·2 (s.e. 0·17) for LGA, LFC and DFI. The correlated response in LFC (1·6 (s.e. 0·18)) with selection on LGA was greater than the direct response in LFC. Conversely, the direct response in LGA was greater than the correlated response (1·1 (s.e. 0·18)) with selection on LFC. The response in LFC (–1·1 (s.e. 0·17)) with selection on DFI was similar in size but opposite in sign to the direct response in LFC. Responses were asymmetric about the control, as the high LGA and LFC responses were proportionately smaller (0·74 and 0·58) than low line responses. In contrast, the difference between the high DFI and control was four times greater than the difference between low line and control.Heritabilities of LGA, LFC and DFI were 0·38, 0·35 and 0·29 (s.e. 0·03), when estimated by residual maximum likelihood, with common environmental effects of 0·09 (s.e. 0·02). Genetic correlations for LGA with LFC and DFI were positive, 0·76 (s.e. 0·03) and 0·23 (s.e. 0·07), but the genetic correlation between DFI and LFC was negative, –0·45 (s.e. 0·06). The experiment demonstrated that substantial responses to selection can be achieved in LGA, LFC and DFI. Selection on LGA resulted in larger direct and correlated responses than selection on LFC.

Selection for components of efficient lean growth in Large White pigs

1994 ◽  
Vol 1994 ◽  
pp. 9-9
Author(s):  
N.D. Cameron
Keyword(s):  
Growth Rate ◽  
Selection Criteria ◽  
Conversion Ratio ◽  
Food Conversion ◽  
Correlated Responses ◽  
Large White ◽  
Lean Growth ◽  
Food Conversion Ratio ◽  
Daily Food ◽  
Selection For

An experiment was started in 1984 at Edinburgh and Wye to study responses to divergent selection for lean growth rate (LGA), lean food conversion ratio (LFC) and daily food intake (DFI). This paper measured the selection pressure applied, the responses in the selection criteria and estimated the genetic and phenotypic relationships between the selection criteria with ad-libitum feeding of Large White pigs after four generations of selection.Selection objectives and criteria. The LGA (LFC) selection objective was to obtain equal correlated responses in growth rate (food conversion ratio) and carcass lean content, measured in phenotypic s.d. The LGA, LFC and DFI selection criteria had phenotypic s.d. of 27, 29 and 250 units and results are presented in s.d. units.

scholarly journals Selection for ovulation rate in rabbits: Direct and correlated responses estimated with a cryopreserved control population1

2012 ◽  
Vol 90 (10) ◽  
pp. 3392-3397 ◽  
Author(s):  
P. Laborda ◽  
M. A. Santacreu ◽  
A. Blasco ◽  
M. L. Mocé
Keyword(s):  
Ovulation Rate ◽  
Correlated Responses ◽  
Selection For
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