“…The four Griffing's diallels methods have so far been extensively used in several studies involving model I as well model II on maize crop, for estimating the combining abilities of parents for use in hybrid development (Karaya et al, 2009;Devi and Singh, 2011;Gakunga et al, 2012;Cabral et al, 2015;Al-Naggar et al, 2016) or estimating the components of variance (Technow et al, 2012;Chukwu et al, 2016;Nardino et al, 2016;Oliveira et al, 2016) of key agronomic traits. Furthermore, they have been widely applied to other crops such as rice, wheat and potato (Asfaliza et al, 2012;Kumar et al, 2017;Terres et al, 2017). Moreover, the NCDII has been utilised to estimate both combing abilities and components of variance (Ngaboyisonga et al, 2008;Khattab et al, 2011;Narayanamma et al, 2013;Salami and Ogbowuro, 2016).…”