Studies Regarding the Development of Two Genetic Lines of Holstein Friesian Cows Differing in Mature Live Weight

Constantin Gavan, Vergil Motorga, Florian Dragan, Iuliana Preda

Abstract


To achieve optimal profitability in dairy production the type of cow farmed must be suitable for the productionsystem operated. Matching the right type of dairy cow to the dairying will become more important in the future asdairying systems became more diverse. This paper uses first results from current Simnic Holstein Friesiancomparison trial to project the type of cows that will best complement the systems that are developing today and inthe future. In 2004 the experimental herd of Holstein Friesian cows at ARDS Simnic Craiova provided thefoundation cows to develop two lines of cows differing in mature weight. Multiparous cows from the base herd wereblocked by parity, milk solids yield and live weight. Within each block, the heavier cows were inseminated withsemen material from bulls with higher breeding value for live weight, and the lighter cows were inseminated withsemen material from bulls with low breeding value for live weight. The 2 lines developed were „the genetic line ofSimnic Holstein Friesian with heavy live weight” (HF Simnic GVM) and „the genetic line of Simnic HolsteinFriesian with light live weight” (HF Simnic GVm).

Keywords


breeding value; cow type; Holstein Friesian genetic line

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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