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Genetic and Phenotypic Parameter Estimates of Body Weight at Different Ages and Yearling Fleece Weight in Markhoz Goats
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 Title & Authors
Genetic and Phenotypic Parameter Estimates of Body Weight at Different Ages and Yearling Fleece Weight in Markhoz Goats
Rashidi, A.; Sheikahmadi, M.; Rostamzadeh, J.; Shrestha, J.N.B.;
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 Abstract
The objective of the present study was to estimate genetic parameters for economic traits in Markhoz goats. Data collected from 1993 to 2006 by the Markhoz goat Performance Testing Station in Sanandaj, Iran, were analyzed. The traits recorded as body weight performance at birth (BW), weaning (WW), six month (6MW), nine month (9MW), yearling (YW) and yearling fleece weight (YFW) were investigated. Least square analyses were used for estimation of environmental effects. Genetic parameters were estimated with single and multi trait analysis using restricted maximum likelihood (REML) procedures, under animal models. By ignoring or including maternal additive genetic effects and maternal permanent environmental effects, five different models were fitted for each trait. The effects of sex, type of birth, age of dam and year of birth on the all body weights were significant (p<0.01), but had no effects on YFW except year of birth. Age of kids had significant influences on WW and 6MW (p<0.01). A log likelihood ratio test was carried out for choosing the most suitable model for each trait. Total heritability estimates for YFW and growth traits varied from 0.16 for YFW and WW to 0.41 for YW. For all traits, maternal heritability was lower than direct heritability, ranging from 0.06 for BW to 0.01 for 6MW and 9MW. The magnitude of was more substantial for BW than the others, and relative importance was reduced from 0.12 for BW to 0.04 for 9MW. The direct additive genetic correlations estimates were positive and varied from 0.21 between BW-YW to 0.96 between WW-6MW. Direct additive genetic correlations between YFW and body weight traits were positive and ranged from 0.14 between BW-YFW to 0.67 between 6MW-YFW. For all traits, the corresponding estimates for phenotypic correlation were positive and lower than genetic correlations. The maternal additive genetic correlations between various traits were varied and ranged from -0.19 between 9MW-YFW to 0.96 between 6MW-9MW. The estimates of the maternal permanent environmental correlations between various traits were positive and ranged from 0.33 between WW-YFW to 0.93 between WW-6MW. Also, the environmental correlations between various traits ranged from 0.01 between BW-YFW and WW-YFW to 0.70 between 9MW-YW. Estimates of genetic parameters for various traits in this study confirm that selection should be applied on WW for genetic improvement in Markhoz goats.
 Keywords
Markhoz Goat;Body Weight;Mohair;Heritability;Genetic Correlations;
 Language
English
 Cited by
 References
1.
Allain, D. and J. M. Roguet. 2003. Genetic and nongenetic factors influencing mohair production traits within the national selection scheme of Angora goats in France. Small Rumin. Res. 82:129-137.

2.
Al-Shorepy, S. A., G. A. Alhadrami and K. Abdulwahab. 2002. Genetic and phenotypic parameters for early growth traits in Emirat goat. Small Rumin. Res. 45:217-223. crossref(new window)

3.
Bosso, N. A., M. F. Cisse, E. H. van der Waaij, A. Fall and J. A. M. van Arendonk. 2007. Genetic and phenotypic parameters of body weight in West African Dwarf goat and Djallonke sheep. Small Rumi. Res. 67:271-278. crossref(new window)

4.
Duncan, D. B. 1955. Multiple range and multiple F-tests. Biomerics. 11:1-42.

5.
Gerstmayr, S., H. Haussman and W. Schlote. 1989. Estimation of variance component with at animal model including maternal effects. 40th Annual Meeting of the EAAP, 27-31 August, Dublin.

6.
Gerstmayr, S., H. Haussman and W. Schlote. 1992. Estimation of variance component for final and maternal effects in Turkish Angora goats. J. Anim. Breed. Gene. 109:252-263. crossref(new window)

7.
Gerstmayr, S. and P. Horst. 1995. Estimate of performance traits in Turkish Angora goats. Small Rumin. Res. 16:141-157. crossref(new window)

8.
Gifford, D. R., R. W. Ponzoni, J. Burr and R. J. Lampe. 1990. Environmental effects on fleece and body traits of South Australian Angora goat. Small Rumin. Res. 3:249-256. crossref(new window)

9.
Gifford, D. R., R. W. Ponzoni, R. J. Lampe and J. Burr. 1991. Phenotypic and genetic parameters of fleece traits and live weight in South Australian Angora goats. Small Rumin. Res. 4:293-302. crossref(new window)

10.
Gunes, H., P. Horst, M. Evrim and A. Vall-Zarate. 2002. Studies on improvement of the productivity of Turkish Angora goats by crossing with South African Angora goats. Small Rumin. Res. 45:115-122. crossref(new window)

11.
Horst, P., A. Vall-Zarate, H. Gunes and B. C. Yalcin. 1993. Growth rate and wool production of crossbred progeny from Turkish and North American Angora goat. Anim. Res. Develop. :92- 99.

12.
Koratkar, D. P., V. K. Patil and V. S. Narawade. 1990. Mohair production in Angora and crossbred goats. Indian J. Anim. Sci. 60:1010-1012.

13.
Meyer, K. 2000. DFREML Version 3.1: User notes.

14.
Nicoll, G. B. 1985. Estimates of environmental effects and some genetic parameters for weaning weight and fleece weights of young Angora goats. Proc. NZ Soc. Anim. Prod. 45:217-219.

15.
Nicoll, G. B., M. L. Bigham and M. J. Alderton. 1989. Estimates of environmental effects and genetic parameters for live weights and fleece traits of Angora goats. Proc. NZ Soc. Anim. Prod. 49:183-189.

16.
Rashidi, A. 2000. Genetic evaluation of economic traits in Markhoz goats. Ph.D. Thesis, Tarbiat Moddares University, Tehran, Tehran.

17.
Rashidi, A. 2006. Genetic analysis on fleece traits of colour coated Markhoz goats in Kurdistan. Proc. Bsas Conferance. York University, UK. p. 98.

18.
Rashidi, A., M. Ramazanian and R. Vaez Torshizi. 2006. Genetic parameter estimates for growth traits and fleece weight in Markhoz goats. Proc. 8th World Cong. on Genetics Appl. to livest. Prod. Bilohorizenteh, Brazil.

19.
Said, S. I., F. S. Badawi and A. A. Alrawi. 1990. Comparison of white and brown Angora goat with respect to live weight. Proc. 4th World Cong. On Genetic Appl. To Livest. Prod. 15:201-204.

20.
SAS Institute 1989. SAS User's Guide, Version 6, Vol. 2, 4th Edition. GLM-VARCOMP. SAS Institute Inc., Cary, NC.

21.
Shelton, M. and G. W. Basset. 1970. Estimates of certain genetic parameter relating to Angora goat. 2570 Texas Agric. Res. Report. pp. 38-41.

22.
Shelton, M. and G. Snowder. 1983. Some genetic parameter estimates for Angora goats. 4171 Texas Agric. Stat. Report. pp. 165-173.

23.
Snyman, M. A. and J. J. Olivier. 1996. Genetic parameters for body weight, fleece weight and fiber diameter in South African Angora goats. Livest. Prod. Sci. 47:1-6. crossref(new window)

24.
Taddeo, H. R., D. Allain, J. Mueller, H. Rochambeau and E. Manfredi. 1998. Genetic parameter estimates of production traits of Angora goats in Argentina. Small Rumin. Res. 28:217- 223. crossref(new window)

25.
Taddeo, H. R., D. Allain, J. Mueller and H. Rochambeau. 1998. Factors affecting fleece traits of Angora goat in Argentina. Small Rumi. Res. 28:293-298. crossref(new window)

26.
Wenzhong, Liu, Y. Zhang and Z. Zhou. 2005. Adjustment for nongenetic effects on body weight and size in Angora goats. Small Rumin. Res. 59:25-31. crossref(new window)

27.
Willham, R. L. 1972. The role of maternal effects in animals breeding: III. Biometrical aspects of maternal effects in animals. J. Anim. Sci. 35(6):1288-1293.

28.
Yalcin, B. C. 1982. Angora goat breeding. Proc. Of the 3th International Conference on goat production and disease. Tucson, AZ, Arizona. pp. 269-278.

29.
Yalcin, B. C., P. Horst, S. Gerstmayr and T. Oztan. 1989. Research on the breeding of Angora goats in Turkey. Anim. Res. Develop. 30:25-35.

30.
Zeder, M. and B. Hesse. 2000. Old goat in transition. http//www.mnh.si.edu/highlight/goat/