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Sudan Journal of Agricultural Research
Variability, heritability and association of some
traits
in maize (Zea0 mays L.)
Ahmad A. Elali Elkhalf , Eltahir S. Ali and Abu Elhassan S. Ibrahim
Abstract
Field experiments were conducted at the Gezira Research Station (GRS), Wad
Medani, for two seasons (autumn and winter 2005/06) to study the
variability, heritabity and association of grain yield and its components
in some maize genotypes. Significant differences were observed among
genotypes for most of the studied traits, namely plant stand, number of
kernels/row, number of rows/ear, ear length, 1000 kernels weight, ear
diameter and grain yield, in autumn and in plant stand, number of
ears/plant, number of kernels/row, ear diameter and grain yield, in
winter. The broad sense heritability (h2B) estimates ranged from 0.12 to
0.33 for plant stand and number of ears/plant and the highest yielding
genotypes in autumn and winter were MH0102-4 (4.8 t/ha) and CKIR05001
(2.33 t/ha), respectively. Significant and positive regression
coefficients with yield were revealed by number of ears/plant, ear
diameter, number of kernels/row and number of rows/ear. Significant
positive association was also observed between yield and number of
ears/plant, number of kernels/row, number of rows/ear and ear diameter.
Such interrelationships could be utilized effectively in selection
procedures for crop improvement in future programs.
Sudan Journal of Agricultural Research Vol. 9 (2007) PP. 25-31
