Effect of some genetic and nongenetic factors on productive and reproductive traits in Bulgarian Murrah buffalo cows
2002
Penchev, P. (Agricultural Institute, Shumen (Bulgaria))
The present study involves information about the period 1976-1997 and comprises 6835 Bulgarian Murrah cows. A highly significant effect of genetic factors genealogical line on the productive and reproductive traits in adult buffaloes was established; with higher milk yield and butter fat of Valchan 637 and lowest of Youpi 10 and Boiko 635. The highest milk content belongs to Youpi 10 and the lowest to Boiko 635. The line of Valchan 637 has shortest calving interval and Boiko 635 - longest, while Youpi 10 is characterized with older age of first calving. All environmental sources of variance have affected the selection trraits with moderate to high significance. The buffaloes calved in spring and winter produce more milk and have longer lactation. The shortest calving interval belongs to the adult cows calved in summer and the longest to the ones calved in winter.
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