Evaluation of Some Sunflower Genotypes under Drought Condition in Newly Reclaimed Sandy Soil

Document Type : Original Article

Abstract

WATER stress is one of the severe limitations of crop growth especially in arid and semi-arid regions of the world as it has a vital role in plant growth and development at all growth stages. The aim of the present study is to evaluate the response of twelve sunflower genotypes to three levels of water supply to identify the more suitable one for drought condition. Two field experiments were conducted to evaluate twelve diverse sunflower genotypes grown under adequate (3000 m3), moderate (2000 m3) and severe (1000 m3) water regime for chlorophyll index, transpiration rate, leaf water content, plant height, head diameter, seeds/head, 1000-seed weight, seed and oil yield. Moderate and severe water regimes had a significant impact on transpiration
rate, leaf water content, yield contributing characters and oil yield of all sunflower genotypes. However sunflower genotypes showed different response to the different water regimes. The highest seed and oil yields were attained in L990 and Giza 102 under adequate water supply, while L38 was the best under moderate and severe water regime.On the basis of the obtained results, sunflower genotype L990 could be recommended to grow under adequate water supply, while L38 for the moderate and severe water regimes.

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