Key words Rearing condition, breeds, Influence, goat milk, milk composition. Inroduction There are adverse ecological and physiological constraints in the Indian system of goat farming. Goat population of our country increased from 47.14 million in the year 1951 to 124.5 million during 2005. Asian regions possess about 63.78% and India 15.33% of the total world population of goats. Goat produces about 2.4- 2.8 million tones milk i.e. 2.3- 3.0% of total milk produced in the India (F A O, 2005).Currently, When the scientific advances in goat Influence of breeds on goat milk composition under field and farm rearing conditions Gitam Singh 1 and R. B. Sharma 2 1-2 N.F.R. & P.T. Division, C. I. R. G., Makhdoom, Mathura, U.P. 281122 (Received : July, 2013 : Revised : August, 2013; Accepted : September, 2013) Abstract The results showed that all the factors investigated had significant (P<0.001) influence on the milk composition. In this study, laboratory and field experiments were conducted to estimate milk composition applied to two breeds (Jamunapari and Jakhrana) and to determine in the effect of different breeds on goat milk composition under field and farm rearing conditions. Total 1215 samples were analyzed for the analysis of field and farm rearing conditions.The Jakhrana does had the highest (1.0306±0.0004) specific gravity under farm rearing conditions followed by Jamunapari (1.0294±0.0004) farm conditions and lowest in Jamunapari (1.0286±0.0004) does under field rearing conditions and total solids was significantly (p<0.050) higher (13.15±0.030) in field rearing condition than farm rearing conditions in Jakhrana goat milk whereas in case of Jamunapari goat breed milk the total solids per cent was slightly higher(13.22±0.035) in field rearing condition than farm rearing conditions.The solids-not-fat percentage was significantly (p < 0.01) much higher (8.58±0.053) in field rearing conditions either Jakhrana or Jamunapari goat breed than that of farm rearing conditions. It is due to higher fat percentage(4.69±0.044) and lower percentage of protein (3.19±0.034), lactose(4.42±0.012) and ash (0.76±0.007) in farm rearing conditions of Jakhrana as well as Jamunapari goat breeds. production have been mainly based on research and goat farming system research in India. Goat milk is more widely produced then sheep milk, and globally goat production yield 60 per cent of its value of milk, 35 per cent as meat and 5 per cent as skin. There is evidence that on live weight basis the goat is much more efficient milk producer that the other species (Malau-Aduli 2001). The Jamunapari is known as the best dairy goat in India. It is also the tallest breed and commonly known as the “Pari” in its area of origin- the “home tract”-because of its majestic appearance. Its home tract and natural habitat is the Chakarnagar Indian Res. J. Genet. & Biotech. 5(4) : 258-261 (2013) Corresponding author's e-mail : gitamsingh@yahoo.com Published by Indian Society of Genetics, Biotechnology Research and Development, 5, E Biotech Bhawan, Nikhil Estate, Mugalia Road, Shastripuram, Sikandra, Agra 282007 Onlince management by www.isgbrd.co.in