Document Type : Original research
Authors
1
Wheat Research Department, Field Crop Research Institute, Agricultural Research Center (ARC), Giza, Egypt.
2
Wheat Research Department, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt.
10.12816/ejpb.2022.125239.1007
Abstract
A two-year study was conducted at Almatana Agricultural Research Station, Luxor, Agricultural Research Center (ARC), Egypt, during the two successive season to study response of twenty bread wheat genotypes under recommended irrigation and reduced number of irrigation regimes. The results showed that reduced number of irrigation caused noticeable reduction in days to heading and maturity and other earliness and reduction yield and yield components in both growing seasons. Line 16 and 18 were the earliest ones for earliness characters and could be used in breeding programs for earliness. Line 1, 2, Misr 2 and Sids 14 recorded the maximum values for most studied characters, especially, grain yield. The interaction between irrigation and bread wheat genotypes was significant for days to heading, maturity and grain yield showed in second growing season. Based on drought tolerance indices of mean productivity (MP), geometric mean of productivity (GMP), stress tolerance index (STI), yield index (YI), harmonic mean (HM) and modified stress tolerance index (MSTI), Misr 2, Sids 14, Lines 1, 2, 4 and 6 were identified as suitable genotypes under well-watered and water deficit conditions. There were obvious differences among genotypes for grain yield under non-stressed and water stressed treatments which reflect high genetic diversity among them that make possible to screen for genotypes tolerant to water deficit. The first cluster aggregated the genotypes that had the highest grain yield and its component.
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