This comparative study was conducted to access the drought tolerance and yield stability in different genotypes of barley. Study was conducted in growing seasons of 2013-14 and 2014-15 by imposing two water regimes viz. optimal and water stressed. Result of study revealed sufficient genetic variability among the genotypes, substantial expression of genetic potential and the importance of selection was based on stress condition. The mean squares of irrigation regimes explained most of the variations for all the traits in both growing seasons, indicating the relative importance of the genotypes in drought tolerance. Water deficient conditions highly affect the various growth parameters, yield and yield traits in both the studied growing seasons. Among the studied genotypes, Line 2 genotype have minimum heading and maturity time so this genotype could be use as a source of earliness in breeding program. Further, Line 7 and Line 11 genotypes showed highest yield potential under water deficit condition in both seasons, possessed high values for MP, YSI, STI, GMP, YI, and least SSI values less than one indicating suitability of these genotypes for drought tolerance and desirability for both water deficit and non-deficit conditions.
The beneficial and deleterious effects of five isolates of Trichoderma harzianum and seven isolates of T. longibrachiaturn, on the stand and some agronomic traits of flax, were evaluated under field conditions in 2013/2014 and 2014/2015 growing seasons. In each season, seeds of flax cultivar Giza 10 were treated with a dry powder of Trichodermasorghum mixture at a rate of 10 g/kg. seeds. Field evaluation revealed poor and inconsistent performance among the tested isolates from one season to another. Thus, while certain isolates effectively controlled seedling blight and improved some agronomic traits in one season, they were ineffective or even increased the disease in the other season. Due to the unstable and poor performance of Trichoderma isolates, they were considered either ineffective or at the most part effective in controlling flax seedling blight and improving agronomic traits. In each season, grouping the isolates by cluster analysis, based on their effect pattern, was not related to their morphological taxonomy.
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