Comparison of Effective Population Size, Rate and Level of Inbreeding and its Potential Impact on Village Chicken Populations of Southern Africa
Abstract:
The term village chicken best describes the scavenging chickens because of the effect of the village socio-economic and biophysical environment on the production and health status of the chicken. These chickens are predominantly farmed in African villages by small holder farmers. The purpose of this study was to compare rates and levels of inbreeding in village (free range) chickens in Southern Africa. In addition the study sought to investigate the major economic traits that could be negatively affected by inbreeding. The study was carried out in 2007 and 2009 by sampling households in five agro-ecological zones (AEZ) in Zimbabwe and three farming regions in South Africa. Data was captured in the form of surveys conducted using pre-tested questionnaires and included farmer socio-demographic information and household chicken flock sizes and composition. Data was also captured on traits that chicken farmers target when selecting or culling the flocks by ranking traits in order of importance, one being most important and eight being the least important. Three parameters i.e. effective population size (Ne), rate of inbreeding (ΔF) and the level of inbreeding (F) were estimated using different mathematical formulas. Statistical analysis of the effect of agro-ecological zone and country on each of the three parameters was done using Generalized Linear Models procedure in SAS. Results showed that Limpopo province of South Africa and AEZ III of Zimbabwe had highest and lowest Ne, respectively. Consequently, Limpopo and AEZ III had the lowest and the highest ΔF respectively. Both effective population size and rate of inbreeding varied significantly (p<0.05) between farming regions/agro ecological zones within countries. It was observed that chicken body size, reproductive performance, mothering ability and health were ranked high while body conformation and morphological traits (plumage color and comb shape) were ranked the least important traits for choosing animals for breeding and for culling chickens from the flock.
How to cite this article
S.G. Zulu, F.C. Muchadeyi and E.F. Dzomba, 2015. Comparison of Effective Population Size, Rate and Level of Inbreeding and its Potential Impact on Village Chicken Populations of Southern Africa. International Journal of Poultry Science, 14: 23-30.
REFERENCES
Abdelqader, A., C.B.A. Wollny and M. Gauly, 2007. Characterization of local chicken production systems and their potential under different levels of management practice in Jordan. Trop. Anim. Health Prod., 39: 155-164.
PubMed
Aboe, P.A.T., K. Boa-Amponsem, S.A. Okantah, E.A. Butler, P.T. Dorward and M.J. Bryant, 2006. Free-range village chickens on the Accra Plains, Ghana: Their husbandry and productivity Trop. Anim. Health Prod., 38: 235-248.
PubMed
Adesiyun, A.A., S.R. Tatinib and D.G. Hooverb, 1984. Production of enterotoxin(s) by Staphylococcus hyicus. Vet. Microbiol., 9: 487-495.
CrossRef Direct Link
Aini, I., 1990. Indigenous chicken production in South-East Asia. World's Poult. Sci. J., 46: 51-57.
CrossRef Direct Link
Bouzoubaa, K., K. Lemainguer and J.G. Bell, 1992. Village chickens as a reservoir of Salmonella pullorum and Salmonella gallinarum in Morocco. Prevent. Vet. Med., 12: 95-100.
CrossRef Direct Link
Caballero, A., 1994. Developments in the prediction of effective population size. Heredity, 73: 657-679.
CrossRef Direct Link
Chrysostome, C.A.A.M., J.G. Bell, F. Demey and A. Verhulst, 1995. Sero prevalences to three diseases in village chickens in Benin. Preventive Vet. Med., 22: 257-261.
CrossRef Direct Link
Dana, N., L.H. van der Waaij, T. Dessie and J.A.M. van Arendonk, 2010. Production objectives and trait preferences of village poultry producers of Ethiopia: Implications for designing breeding schemes utilizing indigenous chicken genetic resources. Trop. Anim. Health Prod., 42: 1519-1529.
CrossRef Direct Link
Delany, M.E., 2003. Genetic Diversity and Conservation of Poultry. In: Poultry Genetics, Breeding and Biotechnology, Muir, W.E. and S.E. Aggrey (Ed.). CABI Publ., Wallingford, UK., pp: 257-281
Falconer, D.S. and T.F.C. Mackay, 1996. Introduction to Quantitative Genetics. 4th Edn., Prentice Hall, Harlow, England, ISBN-13: 9780582243026, Pages: 464
Direct Link
Gjerde, B., H.M. Gjoen and B. Villanueva, 1996. Optimum designs for fish breeding programmes with constrained inbreeding mass selection for a normally distributed trait. Livestock Prod. Sci., 47: 59-72.
CrossRef Direct Link
Gondwe, T.N.P. and C.B.A. Wollny, 2007. Local chicken production system in Malawi: Household flock structure, dynamics, management and health. Trop. Anim. Health Prod., 39: 103-113.
CrossRef Direct Link
Hall, S.J.G. and D.G. Bradley, 1995. Conserving livestock breed diversity. Trends Ecol. Evol., 10: 267-270.
Hedrick, P., 2005. Genetics of Populations. Jones and Bartlett Publishers, USA
Kelly, P.J., D. Chitauro, C. Rohde, J. Rukwava, A. Majok, F. Davelaar and P.R. Mason, 1994. Diseases and management of backyard chicken flocks in Chitungwiza, Zimbabwe. Avian Dis., 38: 626-629.
Direct Link
Maphosa, T., J. Kusina, N.T. Kusina, S. Makuza and S. Sibanda, 2005. A monitoring study comparing production of village chickens between communal (Nharira) and small-scale commercial (Lancashire) farming areas in Zimbabwe. Livestock Res. Rural Devel., Vol. 16.
Meuwissen, T.H.E. and J.A. Woolliams, 1994. Effective sizes of livestock populations to prevent a decline in fitness. Theoret. Applied Genet., 89: 1019-1026.
CrossRef PubMed Direct Link
Msoffe1, P.L.M., M.M.A. Mtambo, U.M. Minga, H.R. Juul-Madsen and P.S. Gwakisa, 2005. Genetic structure among the local chicken ecotypes of Tanzania based on microsatellite DNA typing. Afr. J. Biotechnol., 4: 768-771.
Mwalusanya, N.A., A.M. Katule, S.K. Mutayoba, M.M.A. Mtambo, J.E. Olsen and U.M. Minga, 2002. Productivity of local chickens under village management conditions. Trop. Anim. Health Prod., 34: 405-416.
CrossRef Direct Link
Muchadeyi, F.C., C.B.A. Wollny, H. Eding, S. Weigand and H. Simianer, 2009. Choice of breeding stock, preference of production traits and culling criteria of village chickens among Zimbabwe agro-ecological zones. Trop. Anim. Health Prod., 41: 403-412.
CrossRef Direct Link
Muchadeyi, F.C., C.B.A. Wollny, H. Eding, S. Weigend, S.M. Makuza and H. Simianer, 2007. Variation in village chicken production systems among agro-ecological zones of Zimbabwe. Trop. Anim. Health Prod., 39: 453-461.
CrossRef
Mushi, E.Z., M.G. Binta, R.G. Chabo and K. Itebeng, 2006. Diseases of indigenous chickens in Bokaa village, Kgatleng district, Botswana. J. S. Afr. Vet. Assoc., 77: 131-133.
Direct Link
Oldenbroek, K., 2007. Utilization and Conservation of Farm Animal Genetic Resources. Wageningen Academic Publishers, The Netherlands
Pante, M.J.R., B. Gjerde and I. McMillan, 2001. Inbreeding levels in selected populations of rainbow trout, Oncorhynchus mykiss. Aquaculture, 192: 213-224.
CrossRef Direct Link
Saleque M.A. and S. Mustafa, 1996. Landless women and poultry: The BRAC model in Bangladesh. Proceedings of the Integrated Farming in Human Development, March 25-29, 1996, Greve, Denmark, pp: 38-55.
SAS., 2007. SAS/STAT User's Guide, Release 8.1. SAS Institute Inc., Cary, North Carolina, USA
Sonaiya, E.B., 1990. The context and prospects for development of small holder rural poultry production in Africa. Proc. CTA Int. Semin. Small Holder Rural Poult. Prod., 1: 35-52.
Sorensen, P., 2001. Breeding strategies in poultry for genetic adaptation to the organic environment. Proceedings of the 4th Network for Animal Health and Welfare in Organic Agriculture, Workshop, March 24-27, 2001, Wageningen -.
Spielman, D., B.W. Brook, D.A. Briscoe and R. Frankham, 2004. Does inbreeding and loss of genetic diversity decrease disease resistance? Conserv. Genet., 4: 439-448.
CrossRef Direct Link
Tadelle, D.S., 2003. Phenotypic and genetic characterization of local chicken ecotypes in Ethiopia. Ph.D. Thesis, Humboldt-University in Berlin, Germany.
Wang, J., 1997. More efficient breeding systems for controlling inbreeding and effective size in animal populations. Heredity, 79: 591-599.
CrossRef
Baker, R.H., P. Guillet, A. Seketeli, P. Poudiougo, D. Boakye, M.D. Wilson and Y. Bissan, 1990. Progress in controlling the reinvasion of windborne vectors into the Western area of the Onchocerciasis control programme in West Africa. Biol. Sci., 328: 731-750.
PubMed
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