Department of Plant Science and Biotechnology

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Combining abilities in single cross hybrid of quality protein maize for grain yield and its components
(Department of Plant Science and Biotechnology, Nasarawa State University, Keffi., 2015-10-03) Mijinyawa, A.; Onovo, J.C.; Isa, Hauwa'u; Junaidu, H.I.; Abdulkarim, B.M
A trial involving five females of normal maize and three males of Quality Protein Maize (parents) were mated in a line x tester mating design in 2012. The resultant 15 F1 crosses and 8 parents were evaluated in 2012/2013 using lattice II design replicated three times at the Institute for Agricultural Research, Ahmadu Bello University, Samaru, Zaria. Seven agronomic traits of parents and F1 were studied to determine their general and specific combining abilities (GCA and SCA, respectively). Highly significant differences (P < 0.05) were observed among the genotypes for all traits except plant height, ear height and ear weight. Sammaz 32 and sammaz 15 were the best parents in terms of G C A for grain yield parameters and most traits. With respect to SCA, hybrids sammaz 17 x sammaz 11 (2471.11) and sammaz 32 x sammaz 15 (1923.7) were the best in terms of grain yield and most traits. The highest values were between plant height and Grain yield. Therefore, three way hybrid crosses could be employed to improve the desired character in the population.