Open Access
Research
(Published
online: 29-06-2016)
21.
Genetic analysis of first lactation
production traits in Kankrej cattle -
K. J. Ankuya, N. K. Pareek, M. P. Patel, B. S. Rathod, K. B.
Prajapati and J. B. Patel
Veterinary World, 9(6): 672-675
doi:
10.14202/vetworld.2016.672-675
K. J. Ankuya:
Livestock Research Station, Sardarkrushinagar Dantiwada
Agricultural University, Sardarkrushinagar, Gujarat, India;
pankajanukuya@gmail.com
N. K. Pareek:
Livestock Research Station, Sardarkrushinagar Dantiwada
Agricultural University, Sardarkrushinagar, Gujarat, India;
nawalpareek40@yahoo.com
M. P. Patel:
Livestock Research Station, Sardarkrushinagar Dantiwada
Agricultural University, Sardarkrushinagar, Gujarat, India;
may250887@gmail.com
B. S. Rathod:
Livestock Research Station, Sardarkrushinagar Dantiwada
Agricultural University, Sardarkrushinagar, Gujarat, India;
drmbsrathod@gmail.com
K. B. Prajapati:
Livestock Research Station, Sardarkrushinagar Dantiwada
Agricultural University, Sardarkrushinagar, Gujarat, India;
nawalpareek40@yahoo.com
J. B. Patel:
Livestock Research Station, Sardarkrushinagar Dantiwada
Agricultural University, Sardarkrushinagar, Gujarat, India;
drjbpvet@gmail.com
Received: 09-01-2016, Accepted: 24-05-2016, Published online:
29-06-2016
Corresponding author:
N. K. Pareek, e-mail: nawalpareek40@yahoo.com
Citation:
Ankuya KJ, Pareek NK, Patel MP, Rathod BS, Prajapati KB, Patel
JB (2016) Genetic analysis of first lactation production traits
in Kankrej cattle,
Veterinary World, 9(6):
672-675.
Abstract
Aim:
The aim was to estimate genetic factors affecting the first
lactation milk production traits in Kankrej cattle of North
Gujarat.
Materials and Methods:
The 475 first lactation records of Kankrej cows that were
maintained at the Livestock Research Station, Sardarkrushinagar
Dantiwada Agricultural University, Sardarkrushinagar, Gujarat,
over a period of 35 years from 1980 to 2014 were studied. The
least squares maximum likelihood program was used to estimate
genetic parameters of first lactation traits. Heritability was
estimated through paternal half-sib analysis in adjusted data.
Results:
The heritability estimate for production traits was 0.40±0.17,
0.45±0.17, 0.35±0.18, and 0.20±0.14 for standard 300 days milk
yield (F300Y), total lactation milk yield (FLY), wet average (FWA),
and lactation length (FLL), respectively, in the first parity.
All the genetic and phenotypic correlations among different
production efficiency traits were high and positive. Genetic
correlations between F300Y and FLY, FLL, and FWA were 0.80±0.20,
0.59±0.16, and 0.81±0.32,where as the phenotypic correlations
were 0.969, 0.688, and 0.868, respectively. Genetic correlations
of FLY with FLL and FWA were 0.60±0.13 and 0.79±0.20, whereas
the phenotypic correlations were 0.777 and 0.817, respectively.
Genetic and phenotypic correlation between FLL and FWA was
0.63±0.28 and 0.31, respectively.
Conclusion:
The heritability estimate of all first parity lactation traits
waslow to medium (0.20-0.45) indicated the scope for further
improvement in this trait through selection as well as
managemental practice. Higher genetic and phenotypic correlation
between thefirst lactation milk production traits gives theidea
that genetic gain due to selection for one trait also
givesmorecorrelated response of selection for other traits which
is economically advantageous.
Keywords:
correlation, heritability, first parity, Kankrej cattle.
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