Analysis of longevity in Romanian Spotted, Simmental type cattle breed

Rodica Stefania Pelmus, Horia Grosu, Mircea Catalin Rotar, Mihail Alexandru Gras, Cristina Lazar

Abstract


The aim of this study was to estimate the genetic parameters for productive life in Romanian Spotted, Simmental type cattle breed using a survival model. The Weibull proportional hazard model was used in this study. The data of productive life of cattle were obtained from Romanian Breeding Association Romanian Spotted, Simmental type. The data consisted of records of 1064 Romanian Spotted, Simmental cows.

The average productive longevity was 1020.9 days for Romanian Spotted, Simmental type cattle breed. The heritability values for productive longevity in this population was 0.097. The breeding values for productive longevity of cattle ranged from -0.827 to 0.478 months. Longevity is a important trait in breeding program.


Keywords


productive longevity; survival model; cattle

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References


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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
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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
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

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