Estimates of Genetic and Environmental Effects on Performance Traits from Limousin Field Data

Massey, Matt; Benyshek, L. L.

doi:10.2527/jas1981.52137x

Cited by 12 publications

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“…Similar results for birth weight have been described by Sierra [31] in Spanish Brown Swiss cattle before being selected for milk production, Villalba et al [36] in the Brown Swiss and Pirenaica, and Benyshek et al [3] in the Simmental. The increase of birth weight until the dam attains maturity has also been documented in Simmental calves [3], Limousine calves [22], Suffolk lambs [15], and South African Mutton Merino and Dormer lambs [8]. Weaning weight and daily weight gain were comparable with the results obtained in the Spanish Brown Swiss [31], and Brown Swiss and Pirenaica [36].…”

Section: Discussionsupporting

confidence: 64%

Correction factors for weight productive traits up to weaning in the Bruna dels Pirineus beef cattle breed

Casellas

Piedrafita

2002

Anim. Res.

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-Correction factors for sex of the calf, birth type and age of dam have been calculated regarding birth weight (BW), weaning weight (WW) and average daily weight gain (DWG) in the Bruna dels Pirineus breed. Standard deviations were heterogeneous for the two levels of sex and homogeneous for the two levels of birth type. Therefore, multiplicative correction factors were better for the sex of the calf, whereas additive correction factors were better for birth type. An age of dam correction resulted in either homogeneous (WW and DWG) or heterogeneous (BW) standard deviations depending upon the trait considered. It was observed that in general the additive correction was better, although this correction failed to completely homogenise the standard deviations within the levels of age of the dam for the respective variables. correction factors / beef cattle / productive traits / Bruna dels Pirineus Résumé -Facteurs de correction des caractéristiques de poids jusqu'au sevrage dans la race à viande bovine Bruna dels Pirineus. Les facteurs de correction relatifs au sexe du veau, au type de naissance (simple ou gémellaire) et à l'âge de la mère ont été calculés pour ce qui concerne le poids à la naissance (BW), le poids au sevrage (WW) et le gain de poids moyen quotidien (DWG) dans la race Bruna dels Pirineus. Les écarts types ont été hétérogènes pour les deux niveaux correspondant au sexe, et homogènes pour les deux niveaux correspondant au type de naissance. Par conséquent, les facteurs de correction multiplicatifs ont été meilleurs pour le sexe du veau, tandis que les facteurs de correction additifs ont été meilleurs pour le type de naissance. La correction prenant en compte l'âge de la mère a entraîné des écarts types homogènes (WW et DWG) ou hétérogènes (BW). En général, la correction additive a été meilleure, bien que cette correction n'ait pas rendu complètement homogène les écarts types dans les niveaux d'âge de la mère pour les variables étudiées.

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Section: Discussionsupporting

confidence: 64%

Correction factors for weight productive traits up to weaning in the Bruna dels Pirineus beef cattle breed

Casellas

Piedrafita

2002

Anim. Res.

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“…These estimates imply that yearling weight was a lowly heritable trait and environment controlled most of the variation. These estimates were similar to those (0.14±0.02) reported by Massey and Benyshek (1981) in Limousin breed. Morris et al (1992) reported 0.17±0.06 as an estimate for yearling weight heritability in Hereford cattle.…”

Section: Yearling Weightsupporting

confidence: 91%

Genetic and Phenotypic (Co) variance for Yearling Weight and Post-weaning Growth Rate in Bhagnari×Droughtmaster Calves

Khan¹,

Younas²,

Khan³

1998

Pakistan J. of Biological Sciences

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Heritabilities of and correlations between yearling weight and post-weaning growth rate in Bhagnari and its crosses with Australian Droughtmaster cattle in Balochistan were estimated. Out of 1118 weaning weight observations with sire identification, only 136 had yearling weight recorded on them. The overall mean for the yearling weight was 151.5±38.9 kg while post-weaning growth rate averaged 261±56 gm. Heritability of the traits estimated by paternal half-sib correlation was 0.19±0.24 and 0.03±0.20, respectively. Very large standard errors reflected the scarcity of data points. Both the traits were highly positively correlated (0.72) due to the fact that the growth rate was derived from the yearling weight. The environmental correlation had a similar magnitude (0.67) but genetic correlation was unrealistic.

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“…Calf birth weight has been shown to be an important factor associated with ease of calving (Bellows et al 1971;Laster et (Massey and Benyshek 1981) and from the American Simmental Association (Burfening et al 1978) (20-35, 36-47, 48*59 and 60-192 Searle (19'71 …”

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confidence: 99%

Breed Averages and Age of Dam Adjustment Factors for Birth Weight of Beef Cattle

Tong¹

1983

Can. J. Anim. Sci.

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Estimates of Genetic and Environmental Effects on Performance Traits from Limousin Field Data

Cited by 12 publications

References 0 publications

Correction factors for weight productive traits up to weaning in the Bruna dels Pirineus beef cattle breed

Correction factors for weight productive traits up to weaning in the Bruna dels Pirineus beef cattle breed

Genetic and Phenotypic (Co) variance for Yearling Weight and Post-weaning Growth Rate in Bhagnari×Droughtmaster Calves

Breed Averages and Age of Dam Adjustment Factors for Birth Weight of Beef Cattle

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