Phenotypic and morphometric differentiation of indigenous chickens from Kenya and other tropical countries augments perspectives for genetic resource improvement and conservation
| Autor: | Bernard Agwanda, Sheila C. Ommeh, Jacqueline K Lichoti, Said I. Ng’ang’a, Min-Shen Peng, Irene N. Ogali, Ya-Ping Zhang, Grace K. Moraa, David H. Mauki, Stephen Ogada, Newton O. Otecko |
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| Rok vydání: | 2019 |
| Předmět: |
Male
Kenya animal structures chicken Quantitative trait locus Biology Population stratification Indigenous 03 medical and health sciences parasitic diseases Animals indigenous 030304 developmental biology Swahili Tropical Climate 0303 health sciences Ecology 0402 animal and dairy science Tropics Genetics and Genomics 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Phenotype Breed language.human_language Editor's Choice phenotypic embryonic structures language morphometric Female Animal Science and Zoology Chickens |
| Zdroj: | Poultry Science |
| ISSN: | 0032-5791 |
| DOI: | 10.3382/ps/pez097 |
| Popis: | Indigenous chickens at the Swahili coast and other traditional migratory corridors in Kenya represent important populations that are inconclusively characterized. Using a comprehensive dataset of Kenyan indigenous chickens and additional mined data of chickens from 8 African and 5 Asian countries, we performed univariate and multivariate assessments to uncover the underlying phenotypic and morphometric variability. Kenyan indigenous chickens expressed differentiation of several qualitative and quantitative traits, both among different counties in the Swahili coast, and among coastal, western, and northern migratory corridors. There was a substantial population stratification of these chickens, particularly distinctive clustering of chickens from Marsabit, Lamu, and Kilifi counties. The pooled dataset further clarified a closer phenotypic and morphometric proximity of chickens within different geographical regions. We additionally revealed a preponderance of bantam and rumpless traits to hot and humid locales, and feathered shanks to cooler regions. Currently, most chicken breeding programs in developing countries rely on phenotypic and morphometric properties. Hence, the high chicken diversity and population stratification observed in our study, possibly shaped by natural and artificial selective pressures, reveal opportunities for complementary phenotypic and genotypic assessments to identify resources for effective breed improvement and conservation strategies of indigenous chickens in the tropics. |
| Databáze: | OpenAIRE |
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