Determination of Breeding Objectives of Moghani sheep in Nomadic System

Document Type : Genetics & breeding

Authors

• Reza Seyedsharifi ¹
• fatemeh nour afkan ²
• mostafa phouladi ²
• Jamal Seifdavati ¹

¹ Animal Science Department of University of Mohaghegh Ardebili, Ardebil, Iran.

² University of MohagheghArdabili

10.22067/ijasr.v10i1.59645

Abstract

Introduction Improving animal performance should be sustainable and economically profitable, therefore economic selection indices have been used in most breeding programmes for livestock. For this purpose, economic weighting factors have to be estimated for all traits in the breeding objective.The best way to maximize profitability through genetic improvement is to use economic weights of the trait Involved. In this study, to estimate the economic values of production and reproduction traits, Costs, revenues and profit analysis in nomadic systems, determine the breeding objective for Moghani sheep. The human population is growing fast which it seems that in spite of the recent progresses in new issues and technologies, they are not enough to fulfill feed requirements of humankind. Planning a suitable breeding system would be an important practical method in using the production potential of local sheep flocks. Therefore, it is essential to estimate economic values of production traits in a one or multivariate selection scheme to evaluate the priority in-comes and costs of a breeding system. A bio-economic model was used to describe performance, revenues and costs and to calculate the economic values, economic values are determined from these models by simulating changes in the genetic level of a trait and noting the associated changes in overall economic outcome. As a first step in developing such a programme a suitable breeding goal for the cattle population has to be defined, giving emphasis to production as well as to functional traits in order to achieve a more sustainable production. For a sustainable production, traits that have been identified as important for selection are also functional traits. The economic value of a trait is defined as the increase in profit resulting from a unit genetic improvement in that trait, while all other traits in the breeding objective are kept constant in simple terms economic values are defined as the effect on the efficiency of production of a marginal unit increase in a trait, independent of changes in other traits. Economic efficiency of the production system was calculated as the difference between total revenues and total costs per cow and year at the stationary herd structure.
Materials and Methods In this study, production, reproduction, management and economic parameters resulted from recording of 5 flocks with 500 head of breeding ewes during annual cycle of production (August 2015 to August 2016) in extensive rearing system were used to determine the breeding objective and relative economic values.Traits included; fertility, pregnancy rate, weight lambs from birth to the end of period, survival rate of lambs, wool production weight, average daily gain and milk production. A bioeconomic model was written for rearing system and flock information, economic values using maximum profit orientation was calculated by partial derivative of the profit function by the MATLAB software. To calculate economic values, change in system profit per unit change in the trait while was kept the other characters in the average, and was considered the average change in profit as an economic value. To calculate the relative economic values, the absolute economic value of each trait divided by the absolute economic value of weight of wool.First all costs, revenues, profits and flock structure determined then intered input files and run the software.
Results and Discussion Economic analysis of system indicated that, costs, revenue, and profit per ewe per year were 9437617.88, 10637654.49, and 1200036.61 Rials, respectively.The results showed that live weight, milk yield, manure and wool yield accounted for 86.36 %, 9.64 %, 2.85 and 1.15% of total revenue, respectively. Feeding and management costs (variable costs) represented 73.65% and 26.35 % of total cost, respectively. The relative economic values for Carcass yield, Lamb live weight at 12-month , ewe survival, Post-weaning lamb survival, Pre-weaning lamb survival, Lamb live weight at 4-month, birth weight, conception rates ewes, , little size, Lambing frequency per year, Average daily gain yearlings, Wool weight, Milk yield of ewe, Average daily gain lambs, Replacement female weight, Adult weight of ewes were7.30,4.27, 3.08,2.85,2.44,2.35,2.01,1.85,1.54, 1.42, 1.05,1, 0.55, 0.34,- 0.06, and ( -1.81) respectively.
Conclusion Breeding objective in Moghani sheep breed were Carcass yield, Lamb live weight at 12-month, ewe survival, Post-weaning lamb survival, Pre-weaning lamb survival, Lamb live weight at 4-month, birth weight, conception rates ewes, little size, Lambing frequency per year, Average daily gain yearlings, wool weight, Milk yield of ewe, Average daily gain lambs, Replacement female weight and Adult weight of ewes respectively.

Keywords

• Economic value
• Moghani Sheep
• Nomadic system
• Production traits
• Reproduction traits

20.1001.1.20083106.1397.10.1.5.8

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References

1- Abbasi, M., M. Vatankhah, and M, Nematy. 2010. Estimation of economic values of production and reproduction traits Afshari sheep in rural farming conditions, the final report of the research project, Agriculture and Natural Resources Research Center of Zanjan, The Research Institute of Animal Science. Page 53. (In Persian).

2- Abdollahy, H., S. Hasani., S. Zerehdaran., A. A. Shadparver, and B. Mahmoudi. 2012. Determination of economic values for som important traits in Moghani sheep. Small Ruminant Research, 105(1-3)161-169.

3- Ahmadi-motagi, A. 2002. Estimation of economic values important production traits in Baluchi sheep. The Graduate thesis Faculty of Agriculture, Animal Sciences, University of Mazandaran. (In Persian).

4- Bagheri, M., H. Sayahzadeh., A, Hafezian., A, Nejati Javaromi, and M, Talebi. 2003. Determine the economic values of some important traits in Lori-Bakhtiari sheep. Journal of Agricultural Sciences and Natural Resources of the Caspian, 4(1): 11-17. (In Persian).

5- Bagheri, M., M. Vatankhah, and M. Faraji Nafchi. 2013. Determination of breeding objectives and economic values of Lori-Bakhtiari sheep in nomadic system. Research of Animal Science, 23(1): 101-113.

6- Gallivan, C. 1996. Breeding objectives and selection index for genetic improvement of Canadian sheep. Ph.D. Thesis University of Guelph, 174 pp.

7- Ghavi Hossein Zadeh, N. 2015. Genetic Analysis of Average Daily Gains and Kleiber Ratios in Moghani Sheep, Research on Animal Production11 (1): 108-118. (In Persian).

8- Haghdoost, A., A. Shadparvar., M. T. B. Nasiri, and J. Fayazi. 2008. Estimates of economic values for traits of Arabic sheep in village system. Small Ruminant Research, 80(1-3): 91–94.

9- Harris, D. L. 1970. Breeding for efficiency in livestock production: Defining the economic objectives. Journal of Animal Science, 30(6):860-865.

10- Khodaei, M. 2006. Gilani sheep breeding goals by estimating economic values, the Graduate thesis Animal Science, Faculty of Agriculture, University of Guilan. (In Persian).

11- Kosgey, I. S., J. A. M. Van Arendonk, and R. L. Baker. 2003. Economic values for traits of meat sheep in medium to high production potential areas of the tropics. Small Ruminant Research, 50(1-2): 187–202.

12- Legarra, A., M. Ramon., E. Ugarte, and M. D. Perez-Guzman. 2007. Economic values of fertility, prolificacy, milk yield and longevity in dairy sheep. Animal, 1(2): 193–203

13- Lobo, R. N. B., I. D. C. Pereira. O. Faco, and C. McManus. 2011. Economic values for production traits of Morada Nova Meat sheep in a pasture based production system in semi-arid Brazil. Small Ruminant Research, 96(2-3): 93-100.

14- Morais, O. R, and F. E. Madalena. 2006. Economic value for reproduction traits in Santa Ines sheep. Proceeding. 8th world congress. Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil.

15- Musazadeh, L., A.A. Shadparvar, and M.P Eskandari Nasab. 2012. Estimation of economic values for production and reproduction traits of Afshari sheep in rurul system. Journal of Animal Science Researches, 22(2): 35-44. (In Persian).

16- Ponzoni, R. W.1988. The derivation of econimic values combining income and expense in different ways – an example with Australian Merino Sheep. Journal of Animal Breeding Genetics, 105(1-6):143-153.

17- Smith, C., J. James, and E. W. Brascamp. 1986. On the derivation of economic weights in Livestock improvement. Animal Science, 43(3): 545-551.

18- Talebi, M., S.R. Miraee Ashtiani, M, Moradi Shahr Babak, and A. Nejati Javaromi. 2010. Economic Values of Reproduction, Growth and Carcass Composition Traits in Lori-Bakhtiari Sheep. Iranian Journal of Animal Science, 41(3): 203-213. (In Persian).

19- Tolone, M., V. Riggio, D. O. Maizon, and B. Portolano. 2011. Economic values for productionand functional traits in Valle del Belice dairy sheep using profit functions. Small Ruminant Research, 97(1-3): 41-47.

20- Vatankhah, M., M. Moradi Shahr Babak, A, Nejati Javaromi, S. R. Miraee Ashtiani, and R. Vaez Torshizi. 2009. Determination of breeding objective and economic values for Lori_Bakhtiari breed of sheep in the village system. Animal Sciences Researches in Pajouhesh & Sazandegi, 82(1): 17-25. (In Persian).

21- Wolfova, M., J. Wolf, and M. Milerski. 2011. Economic weights of production and functional traits for Merinolandschaf, Romney, Romanov and Sumavska sheep in the Czech Republic. Small Ruminant Research, 99 (1): 25–33.