Abstract
Received: 2018-05-31 | Accepted: 2018-05-31 | Available online: 2018-11-26 https://doi.org/10.15414/afz.2018.21.04.179-182 Somatic cell count (SCC) is a useful indicator of intramammary infection of cow’s udders and a standard of quality and hygiene of cow’s milk in many countries. The main non-inflammatory factors influencing SCC in goat milk are intrinsic depending directly on the animal and extrinsic where some of them are routinely recorded along milk recording. The objective of this study was to determine the sources of non-genetic variation for SCC in Alpine (ALP) and Saanen (SAN) dairy goat populations based on Croatian (CRO) and Slovenian (SVN) milk recording data. For that purpose, test day records (327,404 in total) were used. They were collected over the period from 2005 to 2017 in Alpine (ALP) and Saanen (SAN) goat populations in Croatia (CRO) and Slovenia (SVN). The majority of records (310,371) represent CRO data, while SVN data included 17,033 records. Data have been obtained from the Central database of Croatian Agricultural Agency and Slovenian Central Database for Small Ruminants, which are collected according to the ICAR standards. Data were analysed using MIXED procedure in SAS/STAT, based on the REML method. Results showed significant effect of the population, parity, litter size, year and month of kidding and interaction between them as well as the effect of the stage of lactation nested within the population on the SCC in milk of studied goat populations. Keywords: Alpine goat, Croatia, dairy goat, logSCC, Saanen goat, Slovenia, somatic cell count References Ali T.E., Schaeffer, L.R., (1987) Accounting for covariances among test day milk yields in dairy cows. Canadian Journal of Animal Science, 67, 1233-1240. ICAR. (2018) Section 16 – Guidelines for performance recording in dairy sheep and dairy goats. Available at: https://www.icar.org/Guidelines/16-Dairy-Sheep-and-Goats.pdf [Accessed 1 May 2018]. Jimenez-Granado, R., Sanchez-Rodrigues, M., Arce C., Rodrigues-Estevez, V. (2014) Factors affecting somatic cell count in dairy goats: a review. Spanish Journal of Agricultural Research, 12 (1), 133-150. DOI: https://dx.doi.org/10.5424/sjar/2014121-3803 CAA (2017) Annual report 2016. Sheep and goats. Zagreb: Croatian Agricultural Agency. Available at: http://www.hpa.hr/wp-content/uploads/2014/06/Ov%C4%8Darstvo-i-kozarstvo.pdf [Accessed 1 May 2018]. Rupp, R., Clement, V., Piacere, A., Robert-Granie, C., Manfredi, E. (2011) Genetic parameters for milk somatic cell score and relationship with production and udder type traits in dairy Alpine and Saanen primiparous goats. Journal of dairy science, 94 (7), 3629-3634. DOI: https://dx.doi.org/10.3168/jds.2010-3694 SAS Institute (2011) SAS/STAT Software, Version 9.3. Cary, NC. Savsek, R., Simcic, M., Cividini, A., Birtic, D., Drasler, D., Zajc, P., Krsnik, J., Stepec, M., Mrkun, J., Potokar, D. (2018) Porocilo o opravljenem delu znotraj STRP na podrocju reje drobnice v letu 2017. Domžale: Zveza drustev rejcev drobnice, Oddelek za zootehniko
Highlights
Dual purpose chicken genotypes are increasingly popular in some regions of Eastern and Middle Europe and Asia, where they play an important social role among farmers and have a positive impact on maintaining rural society and traditional form of agriculture as well as gratify certain local traditions (Almasi et al, 2012).Cross breeding can be carried out as two-way, three-way or four-way crosses, back crosses or rotational crosses
The average day-old weight was highest in OR (34.26 g), intermediate in Oravka × Amrock (ORAM) (34.11 g) and Amrock × Oravka (AMOR) (33.98 g), lowest in AM (33.89 g)
The results showed that both ORAM and AMOR crossbred chickens had lower (P
Summary
Dual purpose chicken genotypes are increasingly popular in some regions of Eastern and Middle Europe and Asia, where they play an important social role among farmers and have a positive impact on maintaining rural society and traditional form of agriculture as well as gratify certain local traditions (Almasi et al, 2012). Cross breeding can be carried out as two-way, three-way or four-way crosses, back crosses or rotational crosses. This system maximizes the expression of heterosis, or hybrid vigour in the cross, normally reflected in improved fitness characteristics (Hoffmann, 2005). Oravka and Amrock breeds with better body weight and feed conversion efficiency
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