Variability of Production Traits in First Lactation Romanian Spotted Breed Heifers
Keywords:
heifers, milk, protein, fat, correlation, variabilityAbstract
Ninety-five first lactation cows of the Romanian spotted breed were used, to study the production traits of the breed and its potential for genetic improvement, in the Buziaş farm, Timiş County. The data were statistically subjected to analyses of variance, for phenotypic parameters: milk, fat and protein yield, fat and protein percentage. Average milk yield per lactation over a standard 305-day lactation length was 3920.63 ± 571.99 kg (ranging from 2598.1 to 5298.7 kg), while fat and protein yields averaged 153.45 ± 22.68 kg (ranging from 98.44 to 208.11 kg) and 126.46 ± 21.08 kg (ranging from 76.51 to 177.35 kg), respectively. A good fat percentage of milk (3.81% ± 0.35) and protein (3.19% ± 0.31) was registered. Milk and fat yield were strong and positive correlated (r = 0.9511). A stronger correlation was registered between milk and protein yield (r = 0.9748). For fat and protein percentage, correlations with milk yield were very low positive, ranging from 0.0648 to 0.0812. Results obtained show that in the studied heifers herd there is a nucleus of positive variants for milk, fat and protein yield, which can be selected to form a valuable dairy cows herd.
References
Muller, L. D., Feeding the modern dairy cows. Proc. SA Large Herds Conference Positioning for the future farm business strategy and Technology to 2010. The Tsitsikamma Conference Centre, South Africa, 2001, pp. 51 -80
Abdullah, J. M., McDaniel, B. T., Genetic parameters and trends of milk, fat, days open and body weight after calving in North Carolina experimental herds. Journal of Dairy Science, 2000, 83, 1364 – 1370
Pantelić, V., Petrović, M. M., Aleksić, S., Ostojić, D., Sretenović, L., Novaković, Ž., Genetic correlations of productive and reproductive traits of Simmental cows in Republic of Serbia, Archiva Zootechnica, 2008, 11, 4, 73-78
White, J. M., Nichols, J. R., Relationships between first lactation, later performance, and length of herd life in Holstein- Friesian cattle, Journal of Dairy Science 1965, 48, 468–474
Kulak, K. K., Dekkers, J. C. M., Allister, A. J., and Lee, A. J., Lifetime profitability measures for dairy cows and their relationships to lifetime performance traits. Canadian, Journal Animal Science, 1997, 77, 609-616
Norman, H. D., Cassell, B. G., Pearson, R. E., Wiggans, G. R., Relation of first lactation production and conformation to lifetime performance and profitability in Jersey, Journal of Dairy Science, 1981, 64, 104-113
SAS Version 9. 1. Statistical software, Copyright (c) 2002-2003 by SAS Institute Inc., Cary, NC, USA
Çilek, S., Tekin, M.E., Environmental factors affecting milk yield and fertility traits of Simmental cows raised at the Kazova state farm and phenotypic correlations between these traits, Turkish Journal of Veterinarian Animal Science, 2005, 29, 987-993
Petrović, M. D., Skalicki, Z., Petrović, M. M., Bogdanović, V., The effect of systematic factors on milk yield in Simmental cows over complete lactations, Biotechnology in Animal Husbandry, 2009, 25, 1-2, 61-71
Logar, B., Effect of breed fraction on dairy traits in cattle, 2007, Home page address: www.kgzs-ms.si/users_slike/metkab/ZED10/ ZEDP14 -Logar. doc.
Kapš, M., Špehar, M., Estimation of genetic parameters and breeding values of milk traits for Simmental cattle in Croatia using a lactation animal model, Agriculturae Conspectus Scientificus, 2004, 69, 4, 91-94
Ulutaş, Z., Sezer, M., Genetic Study of Milk Production and Reproduction Traits of Local Born Simmental Cattle in Turkey, GOÜ. Ziraat Fakültesi Dergisi, 2009, 26, 1, 53-59
Pantelić, V., Novaković, Ž., Ostojić-Andrić, D., Selection of bull dams in population of Simmental cattle, Biotechnology in Animal Husbandry, 2009, 25, 5-6, 301-313
Felenczak, A., Gil, Z., Adamczyk, K., Zapletal, P., Frelich, J., Polymorphism of milk k-casein with regard to milk yield and reproductive traits of Simmental cows, Journal of Agrobiology, 2008, 25, 2, 201-207
Maciuc, V., Creangă, Şt., Schutz, M., Russel, M., Ujică, V., Montbeliard breed in eastern Romania, Scientific papers, University of Agriculture Sciences and Veterinary Medicine Iaşi, Animal Science Series, 2010, 53, 434 -440
Jovanovac, S., Rimac, D., Brinzej, S., Bolic´, M., Differences in milk production traits among first lactation Simmental cows in east Croatian family farms, Agriculture Scientific and Professional Review, 2000, 6, 2, pp. 5-10
Trivunović, S., Plavšić, M., Glamočić, D., Genetic parameters of milking traits and SCC in milk, Scientific papers Animal Science and Biotechnologies Timisoara, 2008, 41, 2, 500 -505
