|Author:||Khalil, F. A. F. ; Samia, G. A. M.|
|Book Group Author:||NA|
Two field experiments were carried out in Giza, Egypt during 2004 and 2005 to evaluate the effects of four irrigation intervals (irrigation every seven days, irrigation every seven days until silking then irrigation every two weeks, irrigation every two weeks until silking and irrigation every seven days, and irrigation every two weeks during the whole season) and two maize hybrids (TWC 310 and TWC 324) on maize yield, its components and some water relations to determine the most important yield components using different statistical procedures. The irrigation intervals differed significantly with respect to ear diameter, number of grains per row, number of grains per ear and biological yield in the first season. In the second season, the irrigation intervals were found to be significant for ear length, ear diameter, number of barren per plants, plant yield, grain yield and biological yield. Both hybrids were not significantly different, except for number of grains per ear in the first season and biological yield in the second season. The interaction between hybrides and irrigation treatments revealed that, to obtain the highest maize yield, yield components and water use efficiency, it could be recommended to plant TWC 310 and irrigate it every seven days. Simple correlation analysis revealed that seven yield components were found to be highly significant and correlated with plant yield. Multiple linear regression analysis exposed five yield components that had the highest contribution to maize plant yield with R2 equal to 0.938. Principle component analysis was more efficient than simple correlation analysis and stepwise multiple linear regression analysis, which assigned only four yield components that could account for 95.045% of the total variation. These four yield components were ear length, number of grains per row, number of grains per ear, and 100-grain weight. It is recommended to select these four components in breeding programmes for maize hybrids.
|Pages:||393 - 406|
|Journal:||Annals of Agricultural Science, Moshtohor|
correlation analysis, crop yield, hybrids, irrigation,maize, maize ears, plant water relations, principal component analysis,regression analysis, water use efficiency, yield components, Egypt, Zeamays, North Africa, Africa, Mediterranean Region, Middle East,Developing Countries, Zea, Poaceae, Cyperales, monocotyledons,angiosperms, Spermatophyta, plants, eukaryotes, corn, watering, FieldCrops (FF005) (New March 2000), Plant Breeding and Genetics (FF020),Plant Water Relations (FF062), Plant Production (FF100), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]