|Book Group Author:||NA|
A field experiment with six wheat cultivars (Sonalika, Kalyan Sona, VL 616, Opal, Bezostaya and Blue Boy) was conducted during rabi 1998-99 Uttaranchal, India, to understand the photosynthetic basis of yield in wheat under irrigated and rainfed conditions. The rates of photosynthesis, canopy photosynthesis, transpiration and leaf temperature depression exhibited significant reductions under rainfed conditions. Blue Boy had the highest photosynthetic rate under irrigated conditions; however, under rainfed conditions, Sonalika and VL 616 maintained the highest photosynthetic rate and grain yield. Moreover, VL 616 and Sonalika exhibited the highest drought tolerance efficiency, indicating that VL 616 and Sonalika had the mechanism(s) for better functioning of physiological processes such as photosynthesis under rainfed condition. Further, significant positive association of relative water content (r=0.570) and leaf temperature depression (0.754) with drought tolerance efficiency in turn suggested their importance for screening the wheat genotypes for drought tolerance.
|Pages:||116 - 120|
|Journal:||Annals of Agricultural Research|
canopy, crop yield, cultivars, drought resistance,irrigation, leaves, photosynthesis, rain, temperature, transpiration,water content, wheat, India, Uttaranchal, Triticum, Triticum aestivum,Poaceae, Cyperales, monocotyledons, angiosperms, Spermatophyta, plants,eukaryotes, Triticum, South Asia, Asia, Developing Countries,Commonwealth of Nations, India, carbon assimilation, carbon dioxidefixation, crown cover, cultivated varieties, drought tolerance, leafcanopy, rainfall, watering, Field Crops (FF005) (New March 2000), PlantBreeding and Genetics (FF020), Plant Physiology and Biochemistry(FF060), Plant Water Relations (FF062), Plant Production (FF100),Environmental Tolerance of Plants (FF900), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]