4-Title: Relative growth rate in Sirohi kids under field conditions
Authors: Vishnu Kumar and RK Nagda
Source: Ruminant Science (2024)-13(2):211-214.

Abstract

How to cite this manuscript: Kumar Vishnu and Nagda RK (2024). Relative growth rate in Sirohi kids under field conditions. Ruminant Science 13(2): 211-214.
Abstract
The present study was conduected on data of 5508 Sirohi kids born from the year 2005 to 2017 under field conditions to estimate the relative growth rate (RGR) and factors influencing it using the least square maximum likelihood method. The overall least-squares means for relative growth rate from birth to six months age (RGR1) and from six months to twelve months age (RGR2) were found as 1.07±0.01 and 0.222±0.007 per cent per day, respectively. Effect of sire, year of birth, type of birth, sex of kid and cluster had a highly significant (P<0.01) effect on both traits, whereas season of birth had a highly significant effect (P<0.01) only on RGR2. The parity of the dam had a significant effect (P<0.05) only on RGR1. Heritability estimates for RGR1 and RGR2 were 0.53±0.06 and 0.47±0.07. Genetic and phenotypic correlations between both traits were found to be high but negative. References Brody S (1945). Bioenergetics and Growth. Rainhold Publishing Corporation, New York, pp 502-14. Harvey WR (1990). User’s Guide for LSMLMW and MIXMDL PC-2 Version. Mixed model least-square and maximum likelihood computer program. Ohio State University, Ohio, USA. Kesbi FG and Tari AR (2015). Relative growth rate in sheep: heritability and relationship with absolute growth rate and body weight. Songklanakarin Journal of Science and Technology 37(1):21-27. Kesbi FG and Eskandarinasab M (2018). Heritability of relative growth rate and its relationship with growth-related traits in Afshari sheep. Gene Reports 12:225-229. Khadda BS (2017). Study on various goat production systems in Tarai region with special reference to Pantja goats. PhD thesis submitted to GBPUAT, Pantnagar. Khadda BS, Singh B, Singh DV, Singh SK and Singh CB (2020). Factors affecting the instantaneous relative growth rate of Pantja kids under range conditions. Indian Journal of Animal Sciences 90(3):152-154. Kharkar Kranti P, Sawarkar Alka, Gawande Priya, Patil MS and Korade VB (2024). Morphometric diversity of Berari and Osmanabadi goats of Maharashtra. Ruminant Science 13(1):117-120. Kumar Vishnu and Nagda RK (2022). Factors affecting average daily gain in Sirohi goats at farmers’ flocks. Ruminant Science 11(2):351-356. Murdia CK and Nagpal NK (2007). Growth profile in Magra sheep in semi-arid regions of Rajasthan at farmers flock level. Indian Journal of Animal Sciences 77(12):1298-1300. Pal RS and Bamania MK (2016). Studies on mortality rate in preweaning kids of Sirohi goat. Ruminant Science 5(1):91-93. Sharma KP (1994). Analysis of growth rate in Deogarhi and Parbatsari goats. MSc Ag. Thesis, Rajasthan Agricultural University, Bikaner. Sharma MC (2005). Genetic Investigation of body weight and morphometry traits in Sirohi goats in the field. PhD thesis submitted to Maharana Pratap University of Agriculture and Technology, Udaipur. Singh MK, Rai B and Singh NP (2009). Environmental and genetic effects on growth traits in Jamunapari kids. Indian Journal of Animal Sciences 79(6):582-586. Sulya Vikas, Nanavati S, Jamra MS, Yadav DS, Jha AK and Jamra N (2020). Growth performance of Sirohi goats under different rearing systems. Ruminant Science 9(1):101-102. Sunwasiya Dinesh Kumar, Gautam Lokesh, Kumar Vishnu and Garhwal Pankaj (2020). Comparison of non-linear growth curve models in Sirohi goat. Ruminant Science 9(1):145-150.