Abstract:The study was carried out to evaluate and access the genetic parameters and traits association for eighteen morphological traits of forty maize inbred lines planted at Melkassa Agricultural Research Center during the 2017/18 main cropping season. Grain yield showed positive and significant (p<0.01) genotypic and phenotypic association with ear diameter, leaf per plant, number of kernel row per ear, number of kernel per row, tassel length, thousand kernel weight , number of leaf per plant, thousand kernel weight, tassel length. path coefficient analysis at phenotypic level revealed that the highest positive direct effect on grain yield was exhibited by number leaf per pant (0.361) followed by tassel length (0.308), Thousand kernel weight (0.238), number of kernel row per ear (0.150), number of kernel per row(0.131) and plant height (0.075). These positive direct effects indicate that given other characters are kept constant, increasing one of these characters will increase seed yield which implies that these characters are the major contributors for the improvement of grain yield at genotypic level. However, the traits such leaf length (-0.065), Ear diameter (-0.022) and node per plant (-0.026) had negative direct effect on the grain yield per plant. The genotypic path analysis showed direct effect on grain yield was observed in leaf per plant (0.42), tassel length (0.319) and No. of kernel row per ear (0.145), thousand kernel weight (0.13) and minimum positive direct effect to the grain yield was No. of kernel per row (0.071), and Ear diameter (0.05). Therefore, these traits are more important than other traits for the genetic improvement of maize for yield.
Keywords:correlation, path analysis, Zea mays L.
Correlation and Path analysis Studies among Yield and Yield Related Traits of Maize (Zea mays
L.) Inbred lines in Moisture Stress area, Melkassa, Ethiopia
Talefe Wedwessen, Legesse wolde
International Journal of Novel Research in Life Sciences