The study was carried out at the Laboratory of Animal Breeding Value Establishment and Selection of Lithuanian Veterinary Academy in the time of postgraduate studies from 2003 to 2005. During the last seven years Lithuanian red and red-and-white controlled dairy cattle breeds average yield increased 41.7%, milk fat production - 50.9%, milk proteins production – 46.1%. Between milk fat and milk proteins was found medium positive correlation coefficient (rp =0.36-0.56; p<0.01), which show milk fat increasing has positive effect to milk proteins increasing. Correlation coefficient between milk production and milk fat, milk proteins is very high (rp =0.87-0.96; p<0.01). The analysis of Variance showed the breed influence on reproductive traits of cow to be statistically reliable (p<0.001). The breed had the greatest influence on cows age during calving. The influence of bulls line on many traits of cows exterior is statistically reliable (p<0,001).
| Identifer | oai:union.ndltd.org:LABT_ETD/oai:elaba.lt:LT-eLABa-0001:E.02~2005~D_20050412_134947-22569 |
| Date | 12 April 2005 |
| Creators | Oberauskas, Darius |
| Contributors | Matusevičius, Paulius, Jukna, Viglijus, Kučinskienė, Jūratė, Jukna, Česlovas, Juozaitienė, Vida, Lithuanian Veterinary Academy |
| Publisher | Lithuanian Academic Libraries Network (LABT), Lithuanian Veterinary Academy |
| Source Sets | Lithuanian ETD submission system |
| Language | Lithuanian |
| Detected Language | English |
| Type | Master thesis |
| Format | application/pdf |
| Source | http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050412_134947-22569 |
| Rights | Unrestricted |
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