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Journal of Biological Sciences
  Year: 2011 | Volume: 11 | Issue: 2 | Page No.: 156-164
DOI: 10.3923/jbs.2011.156.164
Evaluation of Yield and Grain Quality of Some Bread Wheat Genotypes under Normal Irrigation and Drought Stress Conditions in Calcareous Soils
Thanna H.A. Abd El-Kareem and Aml E.A. El-Saidy

Abstract:
This study was designed to assess the impact of normal and water stress conditions on yield and quality of grain and seed of eight wheat genotypes and selection criteria for identifying drought tolerant in wheat bread genotypes. So, field and laboratorial experiments were conducted during 2008/10 seasons. The results indicated that water stress significantly decreased almost the studied traits. The lowest decrease of both seedling length and biological yield was produced from Sakha 93 and line 2, respectively. The genotypes 6, 7 and Sakha 93 gave the highest increase in phenols content. While, the others lines reflected the highest increase in proline content. Lines 3, 7, 6 and 2 showed highest increase in oil content. The value of Phenotypic Coefficient of Variability (PCV) was higher than Genotypic Coefficient of Variability (GCV) for growth, yield and its components characters under both conditions. Under water stress, high heritability (b.s.) produced for plant height, number of kernels/spike, 1000-kernel weight and grain yield. Also, 1000-kernel weight, number of spikes m-2 and proline accumulation had highly and significant positive correlation with grain yield. While under normal conditions, grain yield had highly significant negative and positive correlation with days to maturity and plant height, respectively. In general, the high proline and phenols accumulation and number of spikes m-2, 1000-kernel weight and grain yield were recognized as beneficial drought tolerance indicators and may be used as selection criteria in wheat breeding program. Also, planting the genotypes 1, 2, 5 and Sakha 93 may be considered the best parents for drought recovering ability and can be crossed to produce new crosses with desirable characters related to drought tolerance.
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How to cite this article:

Thanna H.A. Abd El-Kareem and Aml E.A. El-Saidy, 2011. Evaluation of Yield and Grain Quality of Some Bread Wheat Genotypes under Normal Irrigation and Drought Stress Conditions in Calcareous Soils. Journal of Biological Sciences, 11: 156-164.

DOI: 10.3923/jbs.2011.156.164

URL: https://scialert.net/abstract/?doi=jbs.2011.156.164

 
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