Working Document Series Open Access Combining ability analysis of quality protein maize (QPM) and non-PM inbred lines for kernel quality and some agronomic characteristics D. Lungu · J. MacRobert · C. Mutimaamba The biggest population in Zimbabwe depend on maize as a source of carbohydrates, yet it is deficient in protein and therefore makes the population prone to protein malnutrition. Quality Protein Maize (QPM) has double the amount of lysine a… RUF-34497 2010 CC BY 4.0 25 Aug 2015