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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

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

We hypothesised that use of reproductive technologies (RTs) would result in increases in economic and genetic gains of a dairy cattle breeding programme. A deterministic approach was used to compare RTs that can be utilised to increase dairy cattle productivity and profitability in Kenya. These...

Author(s)
Gicheha, M. G.; Akidiva, I. C.; Cheruiyot, R. Y.
Publisher
Springer Berlin, Heidelberg, Germany
Citation
Tropical Animal Health and Production, 2019, 51, 2, pp 473-475
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

Research on sexed semen breeding techniques has largely focused on purebred cattle production systems and little work has been done evaluating sexed semen use in crossbred dairy cattle. Complementing a crossbreeding reproduction strategy with sexed semen artificial insemination (AI) has the...

Author(s)
Barrientos-Blanco, J. A.; Thompson, N. M.; Widmar, N. J. O.; Wolf, C. A.; Snyder, L. U.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2018, 211, pp 66-74
AbstractFull Text

More than five decades of research in reproductive biology have resulting in the development of biotechnologies in the cattle industry to increase efficiency in beef and dairy production systems. These technologies are related to gamete and embryo manipulation aimed at improving fertility and...

Author(s)
Lojkić, M.; Getz, I.; Karajić, N.; Samardžija, M.; Maćešić, N.; Karadjole, T.; Babić, N. P.; Bačić, G.; Željezic, D.; Magaš, V.
Publisher
Hrvatski veterinarski institut, Centar za peradarstvo, Zagreb, Croatia
Citation
Veterinarska Stanica, 2018, 49, 2, pp 91-104
Abstract

Changing production circumstances, a wide range of traits and the international bull market enable dairy farmers to make increasingly specific choices concerning artificial insemination (AI) bulls. Finland is part of the joint Nordic dairy cattle breeding programme where in addition to yield, high...

Author(s)
Paakala, E.; Martín-Collado, D.; Mäki-Tanila, A.; Juga, J.
Publisher
Wiley, Berlin, Germany
Citation
Journal of Animal Breeding and Genetics, 2018, 135, 6, pp 410-419

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