Effects of breed, age of dam, birth year, birth season and sex on weaning weight of beef calves

Szabó, Ferenc; Nagy, L.; Dákay, Ildikó; Márton, Dávid; Török, M.; Bene, S.

doi:10.1016/j.livsci.2005.12.005

Cited by 21 publications

(33 citation statements)

References 8 publications

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“…There are numerous studies that have examined weaning weight of different beef breeds and the influence of environmental and genetic effects (Minyard and Dinkel, 1965;Sellers et al, 1970;Pell and Thayne, 1978;Gregory et al, 1979;Meyer, 1994;Cundiff et al,. 1998;Szabó et al, 2006;Vergara et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Population genetic evaluation for weaning weight of different beef cattle breeds

Szabó

Bene²

2013

JCEA

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Population genetic analysis was performed on data from 42,695 purebred beef calves from seven breeds born from 1981 to 2005 in Hungary. Animal model were used for the estimations. Sire, herd, age of dam at calving, birth year, season of birth and sex of calf had significant effects on 205-day calf weaning weight for each breed. Direct heritability value estimates were 0.18 to 0.61, the maternal heritability values from 0.07 to 0.38, and the total heritability values were between 0.09 and 0.35. The direct-maternal genetic correlations were high and negative for all the breeds varying from -0.63 to -0.88. Kulcsszavak: hét fajta, direkt-, anyai-, teljes örökölhetőség-, direk-anyai genetikai korreláció 12

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Section: Introductionmentioning

confidence: 99%

Population genetic evaluation for weaning weight of different beef cattle breeds

Szabó

Bene²

2013

JCEA

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“…Rising number of calves per one birth and number of bred calves is a possibility of raising the efficiency of meat production. Differences between bulls and heifers and single and twins respectively were conclusions of GOYACHE et al (2003), KRUPA et al (2005) and SZABO et al (2006). Age of dam, except for birth weight, was significant (p<0.05) or highly significant (p<0.0001).…”

Section: Analysis Of Environmental Effectsmentioning

confidence: 77%

“…Calves of dams of 2 to 5 years of age show higher growth ability, than calves of dams of 5 to 8 years. This is probably caused by higher lactation performance of younger cows as similar to SZABO et al (2006). On the other hand, KRUPA et al (2005) reported highest calf for dams between the 5 and 7 years of age.…”

Section: Analysis Of Environmental Effectsmentioning

confidence: 97%

Analysis of population and heterosis effects in crossbred cattle of Czech Fleckvieh and Beef Simmental parentage for growth traits

Vostrý

Jakubec

Schlote³

et al. 2008

Arch. Anim. Breed.

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Genetic effects, e.f. population and heterosis effects have been estimated for: Czech Fleckvieh, Beef Simmental and various types of their crosses produced in beef cow-calf operations. The best genetic-statistical model was chosen for the analyze of these effects. The fallowing traits were analyzed: birth weight, weights at 210 and at 365 days of age as well as average daily gains between birth and 210 days, between 210 and 365 days and between birth and 365 days of age. Parameters for all the traits were estimated by the method of least squares means with fixed effects year of birth, herd, sex, type of birth (single or multiple), age of dam and genotype. Genetic models involved the means and two to four crossbreeding effects: i.e. direct and maternal population effect and direct and maternal heterosis effect. The results showed that the genetic model including the mean and all four crossbreeding effects was more accurate and advantageous that the others. For all growth traits crossbreds exceeded both purebred populations. Positive values were estimated for most direct and maternal population effects. Direct and maternal heterosis effects in global showed negative values.

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“…According to Szabó et al (2006), the contribution to the total phenotypic variance of the 205-day weaning weight was: 18.60% by breed, 2.79% by age of dam, 43.23% by birth year, 3.95% by birth season, and 31.43% by sex of calf. These reports are consistent with the results presented in Figure 3.…”

Section: Discussionmentioning

confidence: 99%

“…However, the calves in the above mentioned experiment were not supplemented. Szabó et al (2006) According to Szabó et al (2006) there was effect of dam age, wherein the weaning weight increased up to 5 years and decreased after its maximum (205 kg). This fact was also true for both Angus-Nellore and SimmentalNellore cow groups.…”

Section: Discussionmentioning

confidence: 99%

Efficiency of calf production of cows from two genetic groups

et al. 2014

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-The objective was to evaluate the effect of weight, age and production efficiency of cows from genetic groups based on the calf weight at calving and at weaning. For a period of five years, data of 120 cows (60 Angus-Nellore (AN) and 60 Simmental-Nellore (SN)) at four to nine-years of age were evaluated. All cows were maintained on Brachiaria decumbens pastures, with two forage availability levels (high and low), distributed in a randomized-block design. The cows were placed together with Canchim bulls to generate the crossbred calves. A supplement, consisting of 200 g/kg crude protein and 820 g/kg of total digestible nutrients, was provided to the calves in creep feeding until 210 days-old (weaning). Supplement had a significant effect on the weight of the cow at calving and weaning. The average weights of the Angus-Nellore cows were 529.19 and 514.23 kg at calving and on the weaning day, respectively. These values were higher for Simmental-Nellore cows, which presented 569.60 and 542.59 kg, respectively. The male-calf weight at weaning was 254.69 kg, which was higher than the females (237.70 kg). Genetic group had no effect on weaning weight. The average weight for Canchim × Angus-Nellore calves was 243.41 kg and for Canchim × Simmental-Nellore it was 248.98 kg. Cow age affected weaning weight, promoting a linear increase of 0.804 kg in the weaning weight each year. Younger and smaller cows (Angus-Nellore) are more efficient for calf production.

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Effects of breed, age of dam, birth year, birth season and sex on weaning weight of beef calves

Cited by 21 publications

References 8 publications

Population genetic evaluation for weaning weight of different beef cattle breeds

Population genetic evaluation for weaning weight of different beef cattle breeds

Analysis of population and heterosis effects in crossbred cattle of Czech Fleckvieh and Beef Simmental parentage for growth traits

Efficiency of calf production of cows from two genetic groups

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