Breeding for Calving Performance

Philipsson, J.

doi:10.1007/978-94-009-9315-0_10

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…birth recording data and refer to second calvings. Heritability estimates for birth weight from these data were consistently lower than reported elsewhere ( PHILIPSSON et al 1979). This may be due to the fact that birth weight is estimated by the herdsmen (MEIJERING 1985 a).…”

Section: Parameter Estimatescontrasting

confidence: 50%

“…Previous model calculations on the possibilities to reduce dystocia by selection (PHILIPSSON 1979;HANSET 1981) focussed on the biological responses to different single-trait-selection strategies, i.e. on the reduction in level of dystocia and the contribution of direct and maternal genetic components therein.…”

Section: Discussionmentioning

confidence: 99%

“…Index traits considered were the breeding value estimates for these four characters. Although ease of birth and stillbirth are categorical variates, the distribution of breeding values should be approximately normal (RONNINGEN 1975;PHILIPSSON 1979).…”

Section: Index Traitsmentioning

confidence: 99%

“…The parameter estimates used in the construction of the index equations for calving traits are given in tables 5,6 and 7. Parameters for traits in the direct-effect index were obtained from Philipsson et al (1979).…”

Section: Parameter Estimatesmentioning

confidence: 99%

See 3 more Smart Citations

Revenues from sire selection for calving traits in Dutch dairy cattle

Meijering¹

1986

J Animal Breeding Genetics

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Section: Parameter Estimatescontrasting

confidence: 50%

Section: Discussionmentioning

confidence: 99%

Section: Index Traitsmentioning

confidence: 99%

Section: Parameter Estimatesmentioning

confidence: 99%

See 2 more Smart Citations

Revenues from sire selection for calving traits in Dutch dairy cattle

Meijering¹

1986

J Animal Breeding Genetics

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“…This result is higher than most previous estimates founded in the literature. Aecording to PHILIPSSON (1979) ranged the heritabilty for calving ease direct genetic effect between 0.03-0.20 and 0.00-0.08 for heifers and adult cows. MEIJERING (1984) reported a mean heritability for calving ease in heifers of 0.06 and 0.23 for the observable categorical scale and the underlying normal scale, respectively.…”

Section: Calving Easementioning

confidence: 99%

Heritability of reproduetive traits in Asturiana de los Valles beef cattle breed

Gutiérrez

2001

Arch. Anim. Breed.

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SummaryHeritability was estimated for four reproduetive traits in the Asturiana de los Valles breed in order to evaluate the possibility of include this information in the breed's current improvement program. The estimations were done using an animal model except for calving ease score. For this last trait, a threshold model under a sire model was fitted, with the sire effect as the only random effect in the model besides the residual. Estimated heritabilities for calving interval age at first calving, gestation length, as dam traits, and calving ease were 0.12, 0.27, 0.15 and 0.42, respectively. The estimated heritability for calving interval and age at first calving could justify a sire selection program in the Asturiana de los Valles breed taking account their female offsprings' reproduetive characteristics. Heritability estimates for gestation length and calving ease suggested a close genetic relationship of these two traits and birth weight. Further research is needed to estimate the genetic (co)variances between these three traits to allow the use of this information in a breed improvement program to reduce dystocia without affecting preweaning growth traits.

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Responses to sire selection for dystocia

Meijering¹,

Postma²

1985

Livestock Production Science

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Breeding for Calving Performance

Cited by 4 publications

References 7 publications

Revenues from sire selection for calving traits in Dutch dairy cattle

Revenues from sire selection for calving traits in Dutch dairy cattle

Heritability of reproduetive traits in Asturiana de los Valles beef cattle breed

Responses to sire selection for dystocia

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