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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

To understand farmers' preference and perceptions of breed attributes, breeding and feeding practices, 419 households in western Kenya were interviewed in a cross-sectional survey. Respondents scored their preference for cattle breeds, traits and breeding methods on a scale of 1 (most preferred) to ...

Author(s)
Lukuyu, M. N.; Gibson, J. P.; Savage, D. B.; Rao, E. J. O.; Ndiwa, N.; Duncan, A. J.
Publisher
NISC - Taylor & Francis, Grahamstown, South Africa
Citation
East African Agricultural and Forestry Journal, 2019, 83, 4, pp 351-367
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 article is an information material of breeding records registered by VNIIplem for 2018 on the import of breeding cattle and seed of bulls from countries with highly developed dairy cattle breeding in Russia. After a significant reduction in the number of imported livestock in 2014, starting...

Author(s)
Dunin, I. M.; Tyapugin, S. E.; Semenova, N. V.; Shcheglov, M. E.; Tyapugin, E. E.
Publisher
Redaktsiya zhurnala Zootekhniya, Moscow, Russia
Citation
Zootekhniya, 2019, No.5, pp 11
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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