1.Abera, B., Kebede, K., Gizaw, S. and Feyera, T. 2014. On-farm phenotypic characterization of indigenous sheep types in Selale area, Central Ethiopia. J. Vet. Sci. Technol., 5: 180.

2.Acharya, R.M. 1982. FAO animal production and health paper 30. Food and Agriculture Organisation of the United Nations, Rome.

3.Ananda Rao, K. 2010. Analysis of Sheep production systems of North Coastal Zone of Andhra Pradesh MVSc. Sri Venkateswara Veterinary University, Tirupati.

4.Banerjee, G.C. 1991. A text book of Animal Husbandry. Oxford & IBH publishing Co., New Delhi.

5.Belete, A., Tadesse, A. and Eshetu, A. 2017. Phenotypic Characterization of Indigenous Sheep Types in Bale Zone,Oromia Regional State, Ethiopia. J. Vet. Sci. Technol, 8(4): 1-7.

6.Bhatia, S. and Arora, R. 2010. Lesser-known ovine germplasman under evaluated asset of India. Indian J. Anim. Sci., 80: 880-890.

7.Cankaya, S. 2008. A comparative study of some estimation methods for parameters and effects of outliers in simple regression model for research on small ruminants Ondokuz Mayis University, Biometry and Genetics Unit, Kurupelit / Samsun, Turkey.

8.Choudary, P.V. 2013. Characterization of Macherla brown sheep, M.V.Sc Thesis submitted to Sri Venkateswara Veterinary University, Tirupati.

9.DAHD. 2019. http://dahd.nic.in/dahd/statistics.aspx

10.Dass, N. 2000. Reproductive performance of Muzaffarnagri sheep and its crossbred progeny. Indian J. Anim. Sci., 70: 426-427.

11.FAO. 2000. World Watch list for domestic animal diversity. 3rd edition. (Ed. Beate D. Scherf). FAO of United Nations, Rome, Italy.

12.Firas R. Al-Samarai, Abdulkareem A. and Al-Kazaz. 2015. Applications of Molecular Markers in Animal Breeding: A Review. Am. J. Appl. Sci. Res., 1(1): 1-5.

13.Gangaraju, G. 2010. Studies on Characterization and Performance of Vizianagaram Sheep of North Coastal Andhra Pradesh, Ph.D. Thesis. Sri Venkateswara Veterinary University, Tirupati.

14.Harini, K. 2017. A study on morphological and genetic variation in Nellore Palla sheep. M.V.Sc. Thesis. Sri Venkateswara Veterinary University, Tirupati.

15.Hyder I., Pasumarti M., Reddy P.R., Prasad C.S., Kumar K.A. and Sejian V. 2017 Thermotolerance in Domestic Ruminants: A HSP70 Perspective. In: Asea A., Kaur P. (eds) Heat Shock Proteins in Veterinary Medicine and Sciences. Heat Shock Proteins, vol 12. Springer, Cham. https://doi.org/10.1007/978-3-319-73377-7_1

16.Karthik, D., Suresh, J., Reddy, Y.R., Sharma, G.R.K., Ramana, J.V. and Gangaraju, G. 2021. Farming systems in sheep rearing: Impact on growth and reproductive performance, nutrient digestibility, disease incidence and heat stress indices. PLoS ONE 16(1): e0244922.

17.Mesfin, A. 2015. On farm phenotypic characterization of indigenous sheep types and their production system in Wolaita Zone, Southern Ethiopia. Haramaya University, Ethiopia.

18.Michael, A., Kefelegn, K. and Yoseph, M. 2016. Phenotypic characterization of indigenous sheep types in Northern Ethiopia. J. Nat. Sci. Res., 6(15): 16-27.

19.Prasanna, B. 2019. Molecular genetic analysis of vizizanagaram sheep using microsatellite markers. Thesis submitted to Sri Venkateswara Veterinary University, Tirupati.

20.Rajanna, N., Mahendran, M., Thammi Raju, D., Ragunandan, T., Nagalashmi, D. and Sreenivasarao, D. 2012. Socio- Economic status and flock management practices of sheep farmers in Telangana region of Andhra Pradesh. Vet. Res., 5: 37-40.

21.Rani, M., Ekambaram, B. and Punya Kumari, B. 2014. Biometrical measurements of nellore sheep under field conditions of Andhra Pradesh. Indian Vet. J., 91(05): 17-21.

22.Reddy, P.P.R., Vinoo, R., Muralidhar, M., Venkatasesaiah, C.H., Aswani Kumar, K. and Sudhakar, K. 2020. Socio-economic status, sheep husbandry practices and morphological patterns of macherla sheep, a lesser-known sheep breed of Andhra Pradesh. J. Anim. Res., 10(5): 827-835.

23.Reddy, V.V.D. 2015. A study on productive and reproductive performance of Nellore brown sheep, M.V.Sc Thesis submitted to Sri Venkateswara Veterinary University, Tirupati.

24.Snedecor, G.W. and Cochran, W.G. 1989. Statistical Methods. (8th edn.) Iowa state University Press, Ames, lowa.pp.xx+503.

25.Thiruvenkadan, A.K. 2005. Determination of best-fitted regression model for estimation of body weight in Kanni Adu Kids under farmers management system. Livestock res Rural Dev., 17(7): 11.