C.S. Oaya1*, A.M. Malgwi2, M.M. Degri1, A.E. Samaila1 1Department of Agronomy, Federal University of Kashere, P.M.B. 0182 Gombe State, Nigeria 2Department of Crop Protection, Modibbo Adama University of Technology, P.M.B. 2070 Yola, Adamawa State, Nigeria (Manuscript received 12 Septe

S. Tanchev* Department of Genetics, Breeding and Reproduction, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 12 October 2015; accepted for publication 4 January 2016) Abstract. An overview of the literature on inbreeding and inbreeding dep