Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.1998.196.198HussainM. R. AzizK. 3199813Five maize inbred lines were top crossed to each of the three testers and significant differences were observed among top cross progenies for plant height, ear height, ear length, kernel rows per ear, kernels per row, ear weight and grain yield. Top crosses excelled their respective parents in performance for most of the traits studied. Parents showing high general combining ability (GCA) for a particular trait did not necessity show high specific combining ability for that trait.]]>Arceo, J.M. and J.D.M. Galan,199015711Ivakhnenko, A.N. and E.A. Klimov,199159397Kempthorne, O.,1957Muthiah, A.R., S. Palanisamy and P. Manivasakam,1989767781Zagnitko, K.H.A.,1991Zea tripaacum maize lines using the top-cross method.]]>1991