Browsing by Author "Mijinyawa, A."

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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.
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    Combining Abilities in Single Cross Hybrid of Quality Protein Maize for Grain Yield and Its Components
    (Department of Biological Science, Nasarawa State University, Keffi, 2016-01-05) Mijinyawa, A.; Onovo, J.C.; Junaidu, H.I.; Abdulkarim, B.M.
    A trial involving five females 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 Institute for Agricultural Research, A.B.U Samaru, Zaria. Seven agronomic traits of parents and F1 were studied to determine their general and specific combining abilities (GCA, SCA), highly significant differences was 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, In terms of 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 value was between plant height and Grain yield. It was suggested that a three way hybrid crosses could be employed to improve the desired character in the population.
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    Combining Ability in Quality Protein Maize Using Diallele Crosses Among Five Inbred Lines
    (Department of Microbiology, Nasarawa State University Keffi, 2015-01-05) Junaidu, H.I.; Onovo, J.C.; Mijinyawa, A.; AbdulKarim, B.M.
    A study was conducted to assess the magnitude of combining ability in a half diallel cross. Materials involving 10 hybrids and 5 parents of quality protein maize (QPM) were evaluated in 2013/2014 at the Institute for Agricultural Research farms, IAR. Ahmadu Bello University, Zaria. The analysis of variance for the seven agronomic traits viz: days to 50% tasseling days to 50% silking, plant height, ear weight, ear height, ears per plant and grain yield indicated significant (p<0.05) amount of variability among the genotypes for all the seven traits studied, variances for general combining ability (GCA) were highly significant for all traits except ear height and ear weight. Variance for specific combining ability (SCA) were highly significant for days to 50% tasseling, plant height, ear height, ears per plant and ear weight. Among the parents sammaz 17 was the best general combiner with high GCA effects for grain yield, as well as negative GCA value for days to 50% tasseling and days to 50% silking. Among the hybrids Sammaz 14 x Sammaz 32 and Sammaz 37 x Sammaz 36 showed significant SCA effect in the desired direction. The hybrid with the best yielding quality and earliness to tasseling and silking was sammaz 14 x Sammaz 32 followed by sammaz 37 x Sammaz 36.