Genetic relationships among calving ease, gestation length, and calf survival to weaning in the Asturiana de los Valles beef cattle breed1

Cervantes, I.; Gutiérrez, Juan Pablo; Fernández, I.; Goyache, F.

doi:10.2527/jas.2009-2066

Cited by 42 publications

(32 citation statements)

References 30 publications

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“…). most other studies (0.30-0.48; Burfening et al 1978;MacNeil et al 1984;Wray et al 1987;Cervantes et al 2010). Heritability for DC was in the range of that reported in the literature (0.04-0.11; Meyer et al 1990;Johnston and Bunter 1996;Donoghue et al 2004;Jamrozik et al 2012).…”

Section: Heritability Estimatessupporting

confidence: 61%

Genetic correlations between female fertility and postweaning growth and feed efficiency traits in multibreed beef cattle

Mu¹,

Voort²,

Abo-Ismail

et al. 2016

Can. J. Anim. Sci.

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With selection in beef cattle now incorporating feed efficiency, knowing the relationship with other traits is needed. Genetic relationships were estimated with an animal model in ASReml with a three-generation pedigree inclusive of 2882 animals. Multibreed data from two Ontario beef research farms with fertility traits were available on 1366 females and postweaning traits, including feed efficiency on 1297 individuals. Estimates of heritability for fertility traits were low to moderate ranging from 0.03 ± 0.01 for pregnancy rate to 0.21 ± 0.02 for gestation length, and postweaning traits were moderate to high with feed conversion ratio at 0.22 ± 0.06 to mid-metabolic weight at 0.89 ± 0.01. Both dry matter intake and mid-metabolic weight were genetically correlated with most fertility traits from −0.52 to 0.34. The genetic correlation between average daily gain and days to calving was moderately negative (-0.33 ± 0.16) as was residual feed intake with days to calving (-0.34 ± 0.17). Bigger cows with more feed intake and faster growth were more fertile, and residual feed intake had an unfavorable genetic correlation with days to calving, indicating that programs to select for feed efficiency should include fertility simultaneously in a selection index.Key words: beef cattle, feed efficiency, fertility, genetic parameters.Résumé : Avec l'indice de sélection des bovins de boucherie qui comprend maintenant leur efficience alimentaire, connaître sa relation avec d'autres caractéristiques devient nécessaire. Les relations génétiques ont été estimées au moyen d'un modèle animal dans ASReml avec un pedigree de trois générations qui comprenait 2882 animaux. Des données provenant de multiples races venant de deux fermes de recherche sur les bovins en Ontario dont les caractéristiques de fertilité étaient disponibles pour 1366 femelles et les caractéristiques d'après sevrage, y compris l'efficience alimentaire, étaient disponibles sur 1297 individus. Les estimés de l'héritabilité des caractéristiques de fertilité étaient de faible à modérés allant de 0,03 ± 0,01 pour le taux de gestation à 0,21 ± 0,02 pour la longueur de gestation. Les estimés des caractéristiques post-sevrage étaient de modérés à hauts avec l'indice de consommation à 0,22 ± 0,06 jusqu'au poids mi-métabolique à 0,89 ± 0,01. L'ingestion de matières sèches ainsi que le poids mi-métabolique ont une corrélation génétique avec la plupart des caractéristiques de fertilité, allant de -0,52 à 0,34. La corrélation génétique entre le gain moyen quotidien et les jours au vêlage était modérément négative (-0,33 ± 0,16) de même qu'entre la consommation résiduelle et les jours au vêlage (-0,34 ± 0,17). Les vaches plus grosses avec une plus grande consommation et une croissance plus rapide étaient plus

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Section: Heritability Estimatessupporting

confidence: 61%

Genetic correlations between female fertility and postweaning growth and feed efficiency traits in multibreed beef cattle

Mu¹,

Voort²,

Abo-Ismail

et al. 2016

Can. J. Anim. Sci.

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show abstract

“…Genetic correlation estimates between direct and maternal effects for WW and BW were low. These results are in contrast with usual high negative genetic correlations found in the literature (Cervantes et al, 2010). Specifically, this genetic correlation found for WW suggests that genetic trends in this population would be expected to be independent in both genetic effects.…”

Section: Discussioncontrasting

confidence: 56%

Correlated genetic trends for production and welfare traits in a mouse population divergently selected for birth weight environmental variability

García-Rebollar¹,

Cervantes²,

Ibáñez‐Escriche

et al. 2016

Animal

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The objective of this work was to study the changes that, selecting for environmental variability of birth weight (BW), could bring to other interesting traits in livestock such as: survivability at weaning (SW), litter size (LS) and weaning weight (WW), their variability assessed from standard deviations of LS, standard deviation of WW (SDWW) and also the total litter weight at birth (TLBW) and total litter weight at weaning. Data were registered after eight generations of a divergent selection experiment for BW environmental variability in mice. Genetic parameters and phenotypic and genetic evolution were assessed using linear homoscedastic and heteroscedastic models in which the traits were attributed to the female, except BW and WW that were in some models also attributed to the pup. Genetic correlation between the trait and variability levels was −0.81 for LS and −0.33 for WW. Clear divergent phenotypic trends were observed between lines for LS, WW and SDWW. Although animals were heavier in the high line, TLBW and at weaning was greater in the low line. Despite the negative genetic correlation that was obtained, SDWW was also higher in the high line. Heritabilities were 0.21 and 0.06, respectively, for LS and SW. Both phenotypic and genetic trends showed clear superiority of the low line over the high line for these traits, but inferior for WW. Heteroscedastic model performed similar to the homoscedastic model when there was enough information. Considering LS and survival, the low line was preferred from a welfare point of view, but its superiority from the productivity perspective was not clear. Robustness seemed higher as shown by a low variation and having a benefit to the animal welfare, but this still remains unclear. It was concluded that low variation benefits the welfare of animals.

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“…Sin embargo, dichos estimadores muestran una considerable variabilidad con magnitudes que van de 0,002 (Manatrinon et al 2009) y 0,04 (Yagüe et al 2009) hasta 0,12 (Azevêdo et al 2006b) y 0,15 (van Graan et al 2004), pasando por valores intermedios de 0,07 (Cervantes et al 2010) y 0,09 (Crews 2006). La duración de la gestación es una característica importante porque las vacas con gestaciones más cortas tienen más tiempo para recuperarse y ciclar nuevamente, además de que sus crías disponen de un periodo más largo para alimentarse de leche materna.…”

Section: Duración De La Gestaciónunclassified

Heredabilidad de características reproductivas de vacas Indubrasil.

et al. 2013

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Genetic relationships among calving ease, gestation length, and calf survival to weaning in the Asturiana de los Valles beef cattle breed1

Cited by 42 publications

References 30 publications

Genetic correlations between female fertility and postweaning growth and feed efficiency traits in multibreed beef cattle

Genetic correlations between female fertility and postweaning growth and feed efficiency traits in multibreed beef cattle

Correlated genetic trends for production and welfare traits in a mouse population divergently selected for birth weight environmental variability

Heredabilidad de características reproductivas de vacas Indubrasil.

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