World Journal of
Pharmaceutical and Life Sciences

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Pharmaceutical and Life Sciences
An Official Publication of Society for Advance Healthcare Research (Reg. No. : 01/01/01/31674/16)
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Abstract

FORMATION OF FARM USEFUL INDEXES OF GENERATION FOR AN INCREASE OF BREEDING INDEX OF GENOTYPE OF BLACK MOTLEY BULLS OF HOLSTEIN BREED

Dosmukhamedova Mukhayyo Khusnitdinovna*, Shakirov Kakhramon Juraboevich, Mamurov Golib and Ruziev Oybek

ABSTRACT

The article depicts genotype evaluation and selection of black motley bull-improvers of Holstein breed imported from Germany to “Uznaslchilik” state enterprise. According to obtained and analyzed main parameters of bull-improvers, a total merit index of bull genotype (RZG) and official index for production (RZM), conformation traits (RZE), somatic cell score (RZS), fertility (RZN) and farm use (RZR) indexes were estimated and analyzed. These indexes were estimated and selected individually per bull. Estimation and selection procedures on imported bull-improvers are being implemented together with republic breeding farms on breeding herds. These imported productive bulls are obtained from individual ordered selection and pairing of the parental ancestors estimated by generation quality.

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