J
Joel W. Ochieng
Researcher at University of Nairobi
Publications - 37
Citations - 1450
Joel W. Ochieng is an academic researcher from University of Nairobi. The author has contributed to research in topics: Population & Corymbia. The author has an hindex of 14, co-authored 35 publications receiving 1352 citations. Previous affiliations of Joel W. Ochieng include International Livestock Research Institute & Southern Cross University.
Papers
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Journal ArticleDOI
African pastoralism: genetic imprints of origins and migrations.
Olivier Hanotte,Daniel G. Bradley,Joel W. Ochieng,Yasmin Verjee,Emmeline W. Hill,J. Edward O. Rege +5 more
TL;DR: The genetic signatures of its origins, secondary movements, and differentiation through the study of 15 microsatellite loci in 50 indigenous cattle breeds spanning the present cattle distribution in Africa reveal a major entry point through the Horn and the East Coast of Africa and two modes of introgression into the continent.
Journal ArticleDOI
Geographic distribution and frequency of a taurine Bos taurus and an indicine Bos indicus Y specific allele amongst sub-Saharan African cattle breeds.
Olivier Hanotte,C.L. Tawah,Daniel G. Bradley,M A Okomo,Y. Verjee,Joel W. Ochieng,J.E.O. Rege +6 more
TL;DR: Human migration, phenotypic preferences by the pastoralists, adaptation to specific habitats and to specific diseases are the main factors explaining the present‐day distribution of the alleles in sub‐Saharan Africa.
Journal ArticleDOI
Hybridization of banteng (Bos javanicus) and zebu (Bos indicus) revealed by mitochondrial DNA, satellite DNA, AFLP and microsatellites
Isaac J. Nijman,Myrthe Otsen,E.L.C. Verkaar,C. de Ruijter,E. Hanekamp,Joel W. Ochieng,S. Shamshad,J.E.O. Rege,Olivier Hanotte,M.W. Barwegen,T. Sulawati,Johannes A. Lenstra +11 more
TL;DR: Analysis of hybridization of banteng and zebu in south-east Asian cattle using mitochondrial DNA, AFLP, satellite fragment length polymorphisms, and microsatellite genotyping found tools suitable for the detection of species in introgression studies, which are essential for the genetic description of local breeds and the preservation of their economic and cultural value.
Book ChapterDOI
Production of Anthocyanins in Grape Cell Cultures: A potential Source of Raw Material for Pharmaceutical, Food, and Cosmetic Industries
TL;DR: In this paper, the authors demonstrated that simultaneous production of anthocyanins and betalains is possible in cell cultures and seedlings of producing plants by introducing and ex-pression of genes encoding dihydroxyphenylalanine (L-DOPA) dioxygenases in combination with substrate precursor feeding.
Journal ArticleDOI
Genetic diversity and relationships of indigenous Kenyan camel (Camelus dromedarius) populations: implications for their classification
Mburu Dn,Joel W. Ochieng,S.G. Kuria,Han Jianlin,Han Jianlin,B. Kaufmann,J.E.O. Rege,Olivier Hanotte +7 more
TL;DR: The results do not support the present classification of the indigenous Kenyan dromedary into four distinct breeds based on socio-geographical criteria and point to just two separate genetic entities, the Somali and a group including the Gabbra, Rendille and Turkana populations.