Estimates of Genetic Parameters of Semen Traits in Crossbred Bulls
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Date
2019-09
Journal Title
Journal ISSN
Volume Title
Publisher
TANUVAS
Abstract
Data on 106197 semen ejaculates of 310 Jersey
crossbred bulls maintained at three frozen
semen stations in Tamil Nadu, India from 2002
to 2014 were collected. The data were grouped
sire-wise to estimate heritability, repeatability
and genetic and phenotypic correlations of
certain semen attributes. The heritability and
repeatability estimates of semen volume, sperm
concentration, mass activity, initial sperm
motility, post-thaw sperm motility and number
of doses per ejaculate were 1.46 and 0.32, 0.16
and 0.34, 1.69 and 0.29, 0.26 and 0.48, 0.29
and 0.29; and 0.48 and 0.39, respectively in
CBJY bulls. The genetic correlation coef cient
was -0.45 between semen volume and sperm
concentration, -0.69 between semen volume
and mass activity, -0.30 between semen volume
and initial sperm motility, 0.95 between sperm
concentration and mass activity, 0.18 between
sperm concentration and initial sperm motility
and 0.64 between mass activity and initial
sperm motility. These ndings would be helpful
for the planners and breeders to understand the
amount of additive genetic variance present on
semen traits of Jersey crossbred bulls.
Description
TNV_IVJ_2019_96(9)17-19
Keywords
Veterinary Science