Association of morphological characters in maize (Zea mays L.) populations under water stress and non water stress conditions
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Abstract
The association of different plant characters, under and without water stress conditions, was studied in one local and five exotic open-pollinated maize varieties, in field experiments during the summers of 1988/89 and 1989/90. A split plot design with three replications for each site was used. Genotypes were evaluated for yield and eleven characters. Correlation coefficients under water stress indicated that number of leaves, ear height, black layer maturity, senescence of ear leaf, prolificacy, interval between pollen shed and silking, plant height and grains per row significantly influenced grain yield. Under non-stress conditions, ear length, senescence of ear leaf, grains per row and prolificacy significantly influenced grain yield. Through path coefficient analysis, it was concluded that the improvement of drought tolerance can be achieved by using characters like the interval between pollen shed and silking, prolificacy, number of grains per row and senescence of ear leaf as selection criteria.
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