Correlation and path analysis of yield and yield-contributing traits of maize landraces

Nestory S., Kiriba DS., Kitenge K., Makoye L and Reuben SOWM

Grain yield is an expression of the potential of a genotype to be cultivated at a particular location; however understanding how yield components contribute to harvested yield is essential to the success of breeding programs. In this study, yield components of fifteen maize landraces were investigated in a randomized complete block design with three replications. Broad sense heritability was 67.10% and 98.98% for number of primary branches and days to 50% silking respectively. Genotypic coefficient of variation (GCV) ranged from 5.10% for leaf width and was highest, 45.8% for number of secondary branches. The highest phenotypic coefficient value recorded was 15.27% for number of tertiary braches. One-hundred seed weight (r2 = 0.87) and number of kernels per row (r2 = 0.80) were positively correlated with grain yield traits. Path coefficient analysis showed that grain yield was significantly and positively correlated with plant height (0.87), hundred seed weight (0.87), and number of kernels per row(0.80). Suggesting selection for high yield in maize landraces can be done considering these traits.

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