Genetic Variation of Flowering Trait in Maize (Zea mays L.) under Drought Stress at Vegetative and Reproductive Stages

Salih A. I. Sabiel, Awadalla A. Abdelmula, Elfadil M. A. Bashir, Sana Ullah Baloch, Shahbaz Khan Baloch, Waseem Bashir


A study was conducted under water stress in vegetative and reproductive growth stages at two locations (Shambat and Medani) in Sudan during the season (2003/2004). Genotypic and phenotypic variability, genetic advance and heritability in a broad sense were estimated in a split-plot layout within randomized complete block design with three replications. Fifteen genotypes of maize were used for the study.  Phenotypic correlation coefficient between grain yield and 25%, 50% and 95% of flowering trait anthesis and silking were evaluated. All flowering stages were found significant differences among the genotypes, except days to 95% anthesis. Significant differences among water treatments were observed for days to 25% silking at Medani. High heritability, genotypic coefficient of variation and genetic advance were exhibited by days to 25% silking. Grain yield was significantly and negatively associated with days to (50% and 95%) silking. Based on the results drought stress at vegetative and reproductive stages of maize results in a drastic reduction in grain yield, and flowering character would be the important selection, creation for maize improvement under drought stress.

Keywords: Maize (Zea mays L.), Genetic variability, heritability, correlation, flowering, drought.

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ISSN (Paper)2224-3208 ISSN (Online)2225-093X

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