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Animal Science Database

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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

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

In this study, expected genetic progress and economic benefits from implementing three community-based breeding programs for sheep (CBBP) out- and upscaling strategies were investigated. Strategy 1 is to replicate average existing CBBPs, strategy 2 is to increase the number of breeding males...

Author(s)
Mueller, J. P.; Haile, A.; Getachew, T.; Rekik, M.; Rischkowsky, B.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Small Ruminant Research, 2019, 177, pp 124-132
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
AbstractFull Text

It was reasoned that technologies that increase the reproductive rate of males and females in dairy cattle would realize higher responses to selection. The authors tested this hypothesis using deterministic simulation of breeding schemes that resembled those of dairy cattle in Kenya. The response...

Author(s)
Sagwa, C. B.; Okeno, T. O.; Kahi, A. K.
Publisher
South African Society of Animal Science, Hatfield, South Africa
Citation
South African Journal of Animal Science, 2019, 49, 4, pp 654-663
Abstract

Artificial insemination (AI) is now used for breeding more than 90% of the sows in most of the world's primary pork producing countries. Despite the advancement of methods to cryopreserve boar semen, frozen semen has not been routinely used on farms because of limited efficiency. Liquid semen on...

Author(s)
Waberski, D.; Riesenbeck, A.; Schulze, M.; Weitze, K. F.; Johnson, L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 137, pp 2-7
Abstract

Using reproduction parameters as indicators for cattle welfare has limitations and, at best, these parameters should only be viewed as indirect indicators of welfare. On a farm level, measures such as fertility rates emphasize biological performance of the herd but fail to consider the welfare of...

Author(s)
Ritter, C.; Beaver, A.; Keyserlingk, M. A. G. von
Publisher
Wiley, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2019, 54, s3, pp 29-37
Abstract

Background: In modern dairy breeding programmes, high contributions from foreign sires are nearly always present. Genotyping, and therefore genomic selection (GS), concern only a subpopulation of the breeding programme's wider dairy population. These features of a breeding programme contribute in...

Author(s)
Matthews, D.; Kearney, J. F.; Cromie, A. R.; Hely, F. S.; Amer, P. R.
Publisher
BioMed Central Ltd, London, UK
Citation
Genetics, Selection, Evolution, 2019, 51, 40, pp (16 July 2019)
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

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