Association study in different generations of Maize (Zea mays L.)

Estimation genetic action of heritability percentage and inbreeding depression of four hybrids maize by generation mean analysis

“…[13] studied some genotypes of maize crop to find out the genetic variance of the characteristics of grain weight, number of grains per row and grain yield in hectares, the heritability ratio was high to moderate and that the effect of the additive gene is domaince and thus selection is effective in early generations to improve the studied traits. The [14] results showed during their study of hybrids and the six generations (P1, P2, F1, F2, BC1, BC2) to estimate the domaince genetic action in the inheritance of five traits (ear height, individual plant yield, grain yield, number of tasselling and silking and maturity days) The domaince genetic action has the greatest role in the transmission and inheritance of most of the studied traits, contributing to the additive and domaince genetic action in the transmission and inheritance of other different traits, Therefore, Therefore, the current study aims to improve maize varieties depending on the correlation between the studied traits and the inheritance method, it will have the greatest impact in choosing the appropriate breeding program with high effectiveness to improve the genetic structures of the parents and then obtain the resulting (promising) hybrids to increase the yield in the first place. The genetic action nature, the calculation of the heritability percentage in the narrow and the broad sense, and the inbreeding depression resulting from Selfing inbreeding using the Generation Mean Analysis method, for the field characteristics of four maize crosses, varying in flowering time and physiological maturity, and determining the appropriate breeding method.…”