ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

The experiment was conducted at the experimental field of Field Crops Department, during spring season, while in fall season 2001 it was conducted at the field of Al-Madain. The objective was estimation of several genetic parameters for oil and protein content in maize. In the first season, crossing was done among six inbred lines, (1) BK 10 (2) BK12, (3) BK15, (4) BK20, (5) BK2 and (6) BK6. In the second season a yield trial was conducted, on 15 hybrids, 6 parents and four different other genotypes, in simple partial lattice design with four replications. Significant differences were found among crosses and parents in studied characters also in (gi^i, si^j). The higher differences for the average degree of dominance, broad sense heritability (h2.bs%) and narrow sense heritability (h2.ns%) for oil and protein. The single crosses (4×2), (5×2) had the higher oil percentage (5.94%) and protein (10.25%) respectively. The single crosses (4×2), (5×2) appeared the higher value of positive heterosis (32.39%) for oil and (16.47%) for protein. The hybrids (4×2), (5×3) had the highest (si^j) for protein and oil percentage.
It was concluded that the crosses (4 x 2) and (5 x 2) were promising hybrids for oil and protein content of maize grains.