Heterotic groupings, perse performance and standard heterosis of quality protein maize (Zea mays L.) for yield and yield contributor traits adapted at mid altitude of Ethiopia

For an organized cross breeding program, information on heterotic grouping, perse performance, and commercial heterosis of newly introduced maize lines is required. Therefore, the present study was conducted to determine group, heterosis, crosses mean performance from IITA-Nigeria CIMMYT- Zimbabwe quality protein inbred lines. 36F1 progenies generated four testers nine lines, including standard checks a total 40 entries, thirteen were planted by using Alpha lattice design with three replications at Bako National Maize Research Center Jimma Agricultural center in 2019/20 main cropping season. The combined analysis over two locations showed there significant differences (p