In:
ABI Genetika, National Library of Serbia, Vol. 50, No. 1 ( 2018), p. 243-251
Kurzfassung:
The research was performed on Holstein-Friesian and Black and White bull dams
reared on five farms of Agricultural Corporation of Belgrade - PKB. The
study included 575 lactations of cows selected as bull dams and their
progeny calved in the period from 2007 - 2014 and represent progeny of 24
bulls. The following dairy traits were analysed in a standard lactation (305
days): milk yield (kg) - MY, milk fat content (%) - % MF, milk fat yield
(kg) - MFY, protein content (%) - % PC and protein yield (kg) - PY.
Holstein-Friesian bull dams and their progeny, in standard lactation,
produced on average 9239.84 ? 1607.64 kg of milk, with a milk fat content of
3.44 ? 0.20 and protein content of 3.21 ? 0.12. The impact of bull - sire,
year of birth, lactation order, farm, year and calving season was present at
different levels of statistical significance on yield traits, while the
genetic group had no influence on any of the milk traits. Bull - sire, year
of birth, lactation order and calving season did not influence the
variability of milk fat and protein content. Heritability of observed milk
traits was medium to low. The content of milk fat and protein had the lowest
values of heritability, 0.014, and 0.024, respectively. The heritability of
milk yield, milk fat yield and protein yield was 0.293, 0.319 and 0.273,
respectively.
Materialart:
Online-Ressource
ISSN:
0534-0012
,
1820-6069
DOI:
10.2298/GENSR1801243L
Sprache:
Englisch
Verlag:
National Library of Serbia
Publikationsdatum:
2018
ZDB Id:
2585955-9
SSG:
12
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