Estimation of heterosis and some genetic parameters in 5 × 5 dialle crosses of maize (Zea Mays L.)‎

Abstract EN

The study involved full diallel crosses between five inbred lines of maize was carried out at the experimental station of Duhok University.

Parents and their F1 generation including the reciprocals were arranged in Randomizes Complete Block Design with three replication.

Data were collected on eleven quantitative traits of the studied genotypes and subjected to full diallel analysis according Griffing method to estimate the combining ability, additive components of genetic variance, heritability in broad and narrow sense and heterosis expression.

The results showed, most of the hybrids out-yield mid parents reaching 72% in the combination A119×A132 and A132×DK.

The reciprocal DK×A1059 expressed high heterosis for both oil and protein content with respective value of 3.75 and 2.43%.

Dominance variation was significantly and higher than that of additive and environmental variation.

All studied traits had revealed high broad sense heritability, whereas, heritability in narrow sense was low for almost traits.

The genetic advance was high for plant height, ear height, leaf area, 300-kernel weight and grain yield plant-1.