Correlated response to selection for litter size in pigs: II. Carcass, meat, and fat quality traits

2002 ◽  
Vol 80 (10) ◽  
pp. 2566 ◽  
Author(s):  
J. Estany ◽  
D. Villalba ◽  
M. Tor ◽  
D. Cubiló ◽  
J. L. Noguera
Keyword(s):  
Litter Size ◽  
Correlated Response ◽  
Quality Traits ◽  
Response To Selection ◽  
Fat Quality ◽  
Selection For

Correlated response to selection for litter size in pigs: II. Carcass, meat, and fat quality traits1

2002 ◽  
Vol 80 (10) ◽  
pp. 2566-2573
Author(s):  
J. Estany ◽  
D. Villalba ◽  
M. Tor ◽  
D. Cubiló ◽  
J. L. Noguera
Keyword(s):  
Litter Size ◽  
Correlated Response ◽  
Response To Selection ◽  
Fat Quality ◽  
Selection For

Correlated response to selection for litter size in pigs: I. Growth, fat deposition, and feeding behavior traits

2002 ◽  
Vol 80 (10) ◽  
pp. 2556 ◽  
Author(s):  
J. Estany ◽  
D. Villalba ◽  
J. Tibau ◽  
J. Soler ◽  
D. Babot ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Litter Size ◽  
Fat Deposition ◽  
Correlated Response ◽  
Response To Selection ◽  
Selection For

Estimation of Genetic Parameters and Selection Response for Reproductive and Growth Traits in Rideau-Arcott sheep

2020 ◽  
Author(s):  
Mohammed Naser Boareki ◽  
Luiz Brito ◽  
Angela Cánovas ◽  
V.R. Osborne ◽  
Flavio S Schenkel
Keyword(s):  
Litter Size ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Reproductive Traits ◽  
Selection Response ◽  
Direct Selection ◽  
Correlated Response ◽  
Response To Selection ◽  
Weaning Weight ◽  
Selection For

The goal of this study was to estimate genetic parameters and predict direct and correlated response to selection for lamb growth traits and ewe reproductive traits, based on single trait selection or combining multiple traits in an optimum index that targets total litter post-weaning weight in the first lambing as the main selection goal. Heritability estimates ranged from 0.04 to 0.19. Genetic correlations between growth and reproductive traits ranged from -0.24 to 0.15. The indirect response to selection for reproductive traits in later lambings, by selecting on first lambing performance, was 11 to 25% greater than direct selection. The response to indirect selection for composite reproductive traits, i.e. total weaning weight or total post-weaning weight, by selecting on individual lamb weaning weight or post-weaning weight was 1 to 69% greater than direct selection, but it was accompanied by a negative response on litter size. However, combining alternate growth and reproductive traits in optimum selection index resulted in correlated response of up to 96% greater than direct selection response for reproductive traits without a negative response on litter size. Therefore, multiple trait selection using an index of component traits was more effective than direct selection for a composite trait.

Correlated response to selection for litter size in pigs: I. Growth, fat deposition, and feeding behavior traits1

2002 ◽  
Vol 80 (10) ◽  
pp. 2556-2565 ◽  
Author(s):  
J. Estany ◽  
D. Villalba ◽  
J. Tibau ◽  
J. Soler ◽  
D. Babot ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Litter Size ◽  
Fat Deposition ◽  
Correlated Response ◽  
Response To Selection ◽  
Selection For

scholarly journals Correlated response to selection for litter size environmental variability in rabbits’ resilience

animal ◽  
2019 ◽  
Vol 13 (10) ◽  
pp. 2348-2355 ◽  
Author(s):  
M.J. Argente ◽  
M.L. García ◽  
K. Zbyňovská ◽  
P. Petruška ◽  
M. Capcarová ◽  
...  
Keyword(s):  
Litter Size ◽  
Environmental Variability ◽  
Correlated Response ◽  
Response To Selection ◽  
Selection For

scholarly journals Correlated Response to Selection for Litter Size Residual Variability in Rabbits’ Body Condition

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2447
Author(s):  
Iván Agea ◽  
María de la Luz García ◽  
Agustín Blasco ◽  
Peter Massányi ◽  
Marcela Capcarová ◽  
...  
Keyword(s):  
Litter Size ◽  
Body Condition ◽  
Correlated Response ◽  
Residual Variance ◽  
Response To Selection ◽  
Residual Variability ◽  
Size Variability ◽  
Selection For ◽  
Size At Birth ◽  
Perirenal Fat

A divergent selection experiment for residual variance of litter size at birth was carried out in rabbits during twelve generations. Residual variance of litter size was estimated as the within-doe variance of litter size after pre-correction for year and season as well as parity and lactation status effects. The aim of this work was to study the correlated response to selection for litter size residual variability in body condition from mating to weaning. Body condition is related directly to an animal’s fat deposits. Perirenal fat is the main fat deposit in rabbits. Individual body weight (IBW) and perirenal fat thickness (PFT) were used to measure body condition at second mating, delivery, 10 days after delivery, and weaning. Litter size of the first three parities was analyzed. Both lines decreased body condition between mating to delivery; however, the decrease in body condition at delivery was lower in the low line, despite this line having higher litter size at birth (+0.54 kits, p = 0.93). The increment of body condition between delivery and early lactation was slightly higher in the low line. On the other hand, body condition affected success of females’ receptivity and fertility at the third mating, e.g., receptive females showed a higher IBW and PFT than unreceptive ones (+129 g and +0.28 mm, respectively), and fertile females had a higher IBW and PFT than unfertile ones (+82 g and +0.28 mm, respectively). In conclusion, the does selected for reducing litter size variability showed a better deal with situations of high-energy demand, such as delivery and lactation, than those selected for increasing litter size variability, which would agree with the better health and welfare condition in the low line.

Group feeding behavior of brown trout is a correlated response to selection for growth shaped by the environment

2007 ◽  
Vol 37 (3) ◽  
pp. 525-534 ◽  
Author(s):  
Thierry Boujard ◽  
Julien Ramezi ◽  
Marc Vandeputte ◽  
Laurent Labbé ◽  
Muriel Mambrini
Keyword(s):  
Feeding Behavior ◽  
Brown Trout ◽  
Correlated Response ◽  
Response To Selection ◽  
Group Feeding ◽  
Selection For
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