Effect of Non-Genetic Factors on Pooled Productive and Reproductive Traits in Sahiwal Cattle
DOI:
https://doi.org/10.17140/VMOJ-3-128Keywords:
Pooled lactation traits; Total milk yield; Lactation length; Productive life; Herd life.Abstract
Introduction
The present study investigated the influence of various non-genetic factors on various economic traits to plan better management
practices for higher milk production in Sahiwal cattle.
Materials and Methods
The data for the present investigation were collected over a period of 71-years (1944-2014) from pedigree sheets of 1367 Sahiwal
cows born to 112 sires maintained at Government Livestock Farm, Chak-Ganjeria, Lucknow were utilized. The influence of nongenetic factors on different traits were studied by least-squares analysis of variance for non orthogonal data using mixed model
least-squares and maximum likelihood programme described by Harvey (1990).
Result
The overall performance levels of cows for total milk yield (TMY) and lactation length (LL) were 1815.192±12.87 kg and 300.77
±1.58 days, respectively. The overall least-squares means estimated for all the reproduction traits in this study were 192.60±2.35
days for service period, 163.74±2.31 days for dry period and 475.64±2.78 days for calving interval. The least-squares analysis of
variance for the pooled lactation traits showed the significant (p<0.01) effect of season of calving on total milk yield, whereas it
was significant (p<0.05) for total dry period and non-significant for other pooled lactation traits i.e. lactation length, service period
and calving interval. The effect due to period of calving on all the pooled lactation traits was found to be significant (p<0.01). The
effect due parity on all the pooled lactation traits was also significant (p<0.01).
Conclusion
Analysis of variance for the pooled milk production traits showed that the effect due to season of calving was significant for
total milk yield and total dry period. The effect due to period of calving on all the pooled milk production traits was found to
be significant. The effect due parity on all the pooled milk production traits was also significant effect of non-genetic factors on
pooled milk production and reproduction traits revealed that managemental practices were not similar during different periods.
References
Harvey WR. User guide for LSMLMW and MIXMDL package. Mix Model Least-squares and Maximum Likelihood Computer Programme. PC-2 Version Mimeograph, Columbia, Ohio, USA. 1990.
Kramer CY. Extension of multiple range tests to group means with unequal numbers ofreplication. Biometrics. 1956; 12: 307-310. doi: 10.2307/3001469
Reddy KM. Breed Structure and Genetic Analysis of Pedigreed Sahiwal Cattle [PhD. Thesis]. Kurukshetra, India: Kurukshetra University; 1983.
Singh CV, Barwal RS, Prakash B. Genetic evaluation of different lactation milk yield in Sahiwal cattle. Journal of Livestock Biodiversity. 2010; 2: 91-93. Submit your article to this journal | https://openventio.org/submit-manuscript/ Original Research | Volume 3 | Issue 1| Singh CV, et al
Yadav AS, Rathi SS, Dahiya SP, Arora DN. Factors affecting some performance traits in Sahiwal cattle. Indian J Dairy Sci. 1992; 45(10): 522-527.
Gandhi RS, Gurnani M, Singh A. Influence of non-genetic factors on some of the economic traits of Sahiwal cattle. Indian J Dairy Sci. 1995; 48(10): 605-607.
Chawla DS, Mishra RR. Non-genetic factors affecting produc-tion traits in Sahiwal cattle. Indian Vet J. 1982; 59(1): 44-48.
Reddy KM, Nagarcenkar R. Studies on life-time traits in Sahiwal cattle. Indian J Dairy Sci. 1988; 41: 6-67.
Chaudhary KB, Deshmukh DP, Deshpande KS. Genetic studies on reproductive traits in jersey, Sahiwal and jersey x Sahiwal cross-breds. Indian J Dairy Sci. 1995; 48(2): 172-173.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution 4.0 International License.
All content published in Veterinary Medicine (VM) is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). This license allows anyone to copy, distribute, transmit, and adapt the work — including for commercial purposes — provided appropriate credit is given to the original author(s) and source.
