Increasing yield potential of promising bread wheat lines under drought stress.

Book Title: NA
Year Published: 2008
Month Published: NA
Author: Hamam, K. A.
Book Group Author: NA
Abstract:

Fifty four spring wheat (Triticum aestivum L.) genotypes of diverse origin evaluated for four water irrigation treatments over two seasons. That evaluated 54 spring wheat promising lines for 4 potential competition traits, including plant height (PH), heading to date (HD), 1000-kernel weight (TKW), and grain yield (GY) for the ability of these genotypes to achieve high yields. Differences were found among the 54 spring wheat genotypes for grain yield. The analysis of variance revealed that PH, HD, TKW, and GY were highly significant affected by genotypes, water irrigation treatments and years. The present results reported that drought stress reduced grain yield. The results show that wheat genotypes responded differently to various water irrigation treatments. The seven lines numbers 2, 9, 14, 18, 26, 35 and 47 gave highest grain yield under normal treatment (I1), while the seven lines numbers 2, 4, 14, 22, 35, 47 and 50 gave the highest grain yield under stress treatment (I2), moreover the seven lines numbers 2, 4, 15, 18, 22, 35 and 50 gave the highest grain yield under high stress treatment (I3), on other hand the seven lines numbers 4, 15, 18, 22, 35, 51 and 53 gave the highest grain yield under high stress treatment (I4) over two seasons. Our results indicate that direct selection would be most effective tool to increase the grain yield, while indirect selection on other traits may be effective in improving tolerance to stress. Clearly these data show that lines with similar agronomic performance and different genetic constitutions in this study that can be combined in a breeding program to potentially improve tolerance to drought stress.

Pages: 842 - 860
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20093032807&site=ehost-live
Volume: 4
Number: 6
Journal: Research Journal of Agriculture and Biological Sciences
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 1816-1561
DOI: NA
Keywords:

crop yield, drought, drought resistance, genotypes, headingdate, indirect selection, irrigation, kernels, lines, plant height, seedweight, stress, stress response, traits, water stress, wheat, Triticum,Triticum aestivum, Triticum, Poaceae, Cyperales, monocotyledons,angiosperms, Spermatophyta, plants, eukaryotes, drought tolerance,watering, Field Crops (FF005) (New March 2000), Plant Breeding andGenetics (FF020), Plant Physiology and Biochemistry (FF060), PlantProduction (FF100), Environmental Tolerance of Plants (FF900), SoilWater Management (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]

Source: EBSCO
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