Kariithi Samuel Ngure

Egerton University, Department of Biochemistry and Molecular Biology, P.O Box 536-20115, Egerton, Kenya

Abwao Stephen Indieka

Egerton University, Department of Biochemistry and Molecular Biology, P.O Box 536-20115, Egerton, Kenya

Ndung’u John

Kenya Agricultural and Livestock Research Organization, Food Crops Research Centre Njoro, Kenya

Njau Peter

Highland Agri-consult Services Limited, P.O Box 470-20107, Njoro, Kenya