INHERITANCE OF RESISTANCE TO APHID (Aphis craccivora Koch) IN GROUNDNUT (Arachis hypogeae L.)

A THESIS SUBMITTED TO THE SCHOOL OF POST GRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE AWARD OF A DEGREE OF MASTER OF SCIENCE (M.Sc.) IN PLANT BREEDING.