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Animal Science Database

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Abstract

Genetic evaluation records for the Canadian Holstein, Ayrshire, Jersey, and Brown Swiss bulls and cows born from 1950 and 1960, respectively, were used to study the generation intervals (L) along the four-path selection model. The objectives of the study were to determine the L in the four dairy...

Author(s)
Hagan, B. A.; Cue, R.
Publisher
NRC Research Press, Ottawa, Canada
Citation
Canadian Journal of Animal Science, 2020, 100, 1, pp 175-183
Abstract

The objective of this study was to investigate whether health, survival, and performance of dairy heifers from birth through first lactation are associated with parity and health status of their dams. Holstein heifers (n=1,811) derived from artificial insemination were categorized as (1) daughters...

Author(s)
Carvalho, M. R.; Aboujaoude, C.; Peñagaricano, F.; Santos, J. E. P.; Devries, T. J.; McBride, B. W.; Ribeiro, E. S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2020, 103, 1, pp 823-839
Abstract

The objectives were to evaluate pregnancy per artificial insemination (AI), days to first AI, and proportion pregnant within 7 d of AI eligibility in dairy heifers subjected to presynchronization compared with dairy heifers not presynchronized. Thirty days before AI eligibility, Holstein heifers...

Author(s)
Claypool, C. K.; Spencer, J. A.; Zoca, S. M.; Shafii, B.; Price, W. J.; Ahmadzadeh, A.; Rimbey, N. R.; Dalton, J. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 12, pp 11730-11735
Abstract

Artificial insemination of cattle became a commercial reality in 1936, and in 1952 the first calves were born as a result of freeze-thawed semen insemination. The long-held aspiration for pre determination of sex became a reality with the development of sperm sorting technology with the first...

Author(s)
Burnell, M.
Publisher
MA Healthcare Limited, London, UK
Citation
Livestock, 2019, 24, 6, pp 282-286
Abstract

Our objective in this study was to evaluate the reproductive performance of dairy heifers and cows inseminated with fresh or frozen sex-sorted semen (SS) in seasonal-calving pasture-based dairy herds. Ejaculates of 10 Holstein-Friesian bulls were split and processed to provide (1) fresh...

Author(s)
Maicas, C.; Hutchinson, I. A.; Kenneally, J.; Grant, J.; Cromie, A. R.; Lonergan, P.; Butler, S. T.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 11, pp 10530-10542
Abstract

This article describes the history of the Swiss Fleckvieh dairy breed in Switzerland, the negative effects of crossbreeding and the implementation of new herdbook regulations regarding the conservation of this breed.

Author(s)
Barenco, A.
Publisher
Schweizerischer Fleckviehzuchtverband, Zollikofen, Switzerland
Citation
SwissHerdbook Bulletin, 2019, No.7, pp 6-9
Abstract

The aim of study was to analyse the reproduction and factors affecting on reproduction traits of dairy cows in population of Slovak Spotted cattle from 2007 to 2016 the results for 37,274 dairy cows: days to first service (DFS), days open (DO), number of inseminations per conception (NIC), age of...

Author(s)
Bujko, J.; Candrák, J.; Strapák, P.; Žitný, J.; Hrnčár, C.; Kováčik, A.
Publisher
Ústrední knihovna Mendelovy University v Brne, Brno, Czech Republic
Citation
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2019, 67, 6, pp 1419-1426
Abstract

This article describes the breeding operations and husbandry in a dairy farm in Switzerland.

Author(s)
Guillet, P.
Publisher
Schweizerischer Fleckviehzuchtverband, Zollikofen, Switzerland
Citation
SwissHerdbook Bulletin, 2019, No.8, pp 26-28
Abstract

This paper examines ex-ante impacts of two policy interventions that improve productivity of local-breed cows through artificial insemination (AI) and producers' access to distant markets through a dairy market hub. The majority of cattle in Kilosa district in Tanzania are local low productivity...

Author(s)
Dizyee, K.; Baker, D.; Omore, A.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Journal of Dairy Research, 2019, 86, 4, pp 440-449
Abstract

Dairy bulls are evaluated using progeny data and genomic testing to determine the quantity of specific traits that they will pass to their daughters. Some bulls excel in some traits but not others. Specifying these various traits as outputs, with the single input of insemination, technical,...

Author(s)
Whitt, C. E.; Tauer, L. W.; Huson, H.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2019, 14, 11, pp e0223436

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