Browsing by Author "Selvam, R"
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ArticleItem Open Access Effect of non-genetic factors on productive traits in goat breeds(2021-03) Selvam, R; Venkataramanan, R; Ravimurugan, T; Edwin, SC; TANUVASThe objective of this study is to analyze the impact of non-genetic parameters such as Breed and Sex on body weight at different ages of goat breeds. The data on the body weight of Kanni Adu, Kodi Adu, Jamunapari and Tellichery goat breeds were collected and the body weights at different ages and average daily gains were estimated. Statistical analysis of the data was done using R software. The overall birth weight, weaning weight, one year body weight of all goat breeds were 2-2.9 kg with the mean of 2.35±0.05, 6.7-11.1 kg with the mean of 8.06 ±0.25, 15.4-25.3 kg with the mean of 18.48±0.5, respectively. The pre-weaning and post weaning average daily weight gain of goat breeds ranges from 0.04-0.09 kg and 0.01-0.05 kg with the mean of 0.06 and 0.04 kg, respectively. There is no significant difference between sex in birth weight, weaning weight and pre/post weaning average daily weight gain. But significant difference between male and female goats observed in 6 months, 9 months and 1 year body weight. The least square means of birth weight of Kanni Adu, Kodi Adu, Tellichery and Jamunapari were 2.29±0.04, 2.34±0.04, 2.50±0.04 and 2.64±0.04; weaning weight were 7.84±0.23, 7.73±0.22, 10.12±0.25 and 7.52±0.22b; one year body weight were 18.5±0.334, 18.3±0.32, 22.5±0.37 and 17±0.36, respectively. Different estimates could be due to differences in genetic merit of breeds. From the above study it was concluded that there was significant effect of non-genetic factors namely sex and breed on production parameters of the studied goat breeds.OtherItem Open Access Effect of Pulsed Electromagnetic Field in Adjuvant Induced Arthritis in Rats(TANUVAS, 2006-06) Selvam, R; Raju, K.V.S. Narayana; Sriram, P; Puvanakrishnan, RArticleItem Open Access Estimation of genetic parameters of traits for evaluation of resistance to gastrointestinal nematode infection in Vembur sheep(2021) Selvam, R; TANUVASThe faecal egg count and packed cell volume are parameters used for evaluation of natural resistance against gastrointestinal nematode infection. This study has been carried out to analysis the correlation among the indicator traits for gastrointestinal nematode infection such as FEC, PCV and gain in body weight in Vembur breed of sheep by Pearson correlation coefficient and Spearman's Rank-Order Correlation coefficient methods. The overall least-squares mean for log FEC in Livestock Farm Complex, Veterinary College and Research Institute, Tirunelveli and District Livestock Farm, Abishegappatti, Tirunelveli were 5.0097±0.181 and 6.1911±0.304, the least-squares mean for PCV were 32.57±0.732% and 26.90±0.623% and the least squares mean for ADG gain were -0.69714±0.33 and -1.5731±0.38 kg, respectively. The Pearson Correlation analysis of log-transformed faecal egg count, PCV and ADG showed that there is a highly significant negative correlation between FEC and PCV (-0.787) and between PCV and ADG (-0.660) at the 0.01 level. FEC is positively correlated with body weight gain, which is not significant (0.339). Spearman's RHO Correlations analysis indicated that the FEC had negative associations with PCV (-0.796) and PCV with ADG (-0.602) which are highly significant (P<0.01) and FEC exhibited a positive association with ADG (0.124) but it was not significant. The result implies that if gastrointestinal nematodes egg counts increases then, PCV reduces. The correlation of PCV and FEC may assist in predicting natural resistance to gastrointestinal nematodes in sheep breeds.ArticleItem Open Access GENETIC DIVERSITY AND BOTTLENECK ANALYSIS OF SHEEP BASED ON MICROSATELLITE MARKERS(Indian Society for Sheep and Goat Production and Utilization, 2019) Selvam, R; Kathiravan, P; TANUVASThe genetic diversity of Madras Red sheep at Post Graduate Research Institute in Animal Sciences, Kattupakkam (Tamil Nadu) and Mecheri sheep at Mecheri Sheep Research Station, Pottaneri (Tamil Nadu) was analysed using FAO recommended microsatellite markers. Genetic variation at 10 microsatellite loci, population structure and genetic bottleneck analysis were done to provide genetic information. A total of 98 and 86 alleles were scored for Madras Red and Mecheri sheep, respectively. The polymorphism information content ranged from 0.609 to 0.902 for all the microsatellite loci. The overall observed and estimated heterozygosity for all loci combined were 0.972 and 0.785 for Madras Red and 0.982 and 0.774 for Mecheri sheep, respectively. The average and total heterozygosity of subpopulation was 0.779 and 0.821, respectively. The coefficient of gene differentiation was 0.049 between the breeds which indicates that the genetic diversity is low between the Madras Red and Mecheri breeds of sheep with respect to microsatellite loci studied. The study revealed no genetic bottleneck in recent past and this was confirmed by mode shift test which gave L-shaped distribution for proportion of alleles, indicating that the population is stable with respect to population size. The panel of microsatellites used was highly informative for molecular characterization and could be used for exploitation of genetic diversity of the related breeds for conservation.ArticleItem Open Access The Implications of Intellectual Property Rights in Protecting Animal Genetics Resources and Biodiversity: A Review(2020-07) Selvam, R; TANUVASThe objective of this review is to summarize the importance of various forms of intellectual property rights, impacts of PBR, CBD, TRIPS and Biological Diversity Act 2002 and future prospects in protecting the native livestock breeds and associated traditional knowledge for conservation and their sustainable use in the modern IPR system. Intellectual Property Rights is an exclusive right over the creations of the mind. Intellectual property includes patents, trademarks, industrial designs and geographical indications and copyright. IPR rewards the creativity and it encourages economic growth. PBR is a sui generis system for protecting plants. India is signatory to CBD and TRIPS Agreement, it is obligatory for India to develop suitable legislation to protect and improve livestock genetic resources and associated traditional knowledge. As a member to the UN Convention on Biological Diversity, India formulated the Biological Diversity Act, 2002. The effects of IPRs on animal genetic resources and biodiversity diversity are rarely been evaluated, but there is an imperative need for this analysis. Protection of native livestock breeds and associated traditional knowledge through appropriate sui generis system is essential for conservation and their sustainable use in the modern IPR system. The internationally accepted legal system is must be developed in relation to the use of livestock biodiversity.ArticleItem Open Access NUTRIGENOMICS- AN INTERACTION OF NUTRITION, HEALTH AND GENOMICS, A STEPPING STONE TO PERSONALIZED NUTRITION(2019-03) Selvam, R; TANUVASNutrigenomics is a science which deals with role of nutrient on gene expression. It analyzes how nutrients affect genes (influence on gene expression and function) and how genes affect diet (how an individual responds to nutrients). The individual genotypic variations can alter nutrient metabolism. Nutrigenomics has various benefits and applications as biomarkers, developing strategies for prevention of diseases, designing functional foods, identification of pathways and candidate genes, improving production and reproduction and make a pathway towards personalized nutrition. Nutrigenomics approaches promise to set new standards for nutritional research and will revolutionize the views of nutrient requirements and interactions.ArticleItem Open Access இந்தியா பொருளாதார வளத்திற்குக் கைகொடுக்கும் கால்நடைச் செல்வங்கள்(2020-07) Selvam, R; TANUVAS