Study of stability and adaptation on yield components of bread wheat (Triticum aestivum L.) genotypes

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Research Paper 01/08/2013
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Study of stability and adaptation on yield components of bread wheat (Triticum aestivum L.) genotypes

Mohammad Motamedi, Parviz Safari, Hossein Vaezi
Int. J. Biosci.3( 8), 234-240, August 2013.
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The development of genotypes, which can be adapted to a wide range of diversified environments, is the ultimate goal of plant breeders in a crop improvement programs. Therefore, this study was conducted to evaluate 25 durum wheat (Triticum aestivum L.) genotypes including 3 registered cultivars and 17 advanced breeding lines for their stability grown in three different locations of Iran and to select genotypes having desirable traits to be used in future bread wheat breeding program. Field trials were conducted in a randomized complete block design with three replications at each location. Combined analysis of variance across environments indicated that both environments and GE interactions influenced significantly the genotypes performance for number of spikes per square meter, number of kernels per spike, 1000 kernel weight and grain yield. The stability analysis method of Eberhart-Rusell was used to describe the GE interaction and to define stable genotypes in relation to yield components. The results showed for seed per spike number genotypes 18, Marvdasht and 13 were stable. Based on Eberhart and Russell’s method in experiment for 1000 grain weight genotypes 15 and 19 having regression coefficient near to 1 was known as genotype with good adaptability to all environments. The results showed 1000 grain weight in comparison to other traits was more stable.


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