Study on morphological traits of bread wheat genotypes and their relation with grain yield, under the condition of drought stress after anthesis and normal irrigation
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 1
Abstract
In this investigation 12 bread wheat genotypes were examined for grain yield and some morphological traits in fragmented plots design in the form of complete randomized blocks with three times of recurring, in Ardabil climate, where the factor included two levels of irrigation regime, normal irrigation and drought stress after anthesis stage, whereas the sub factor was wheat genotypes. Results from statistic analysis indicated that there was significant variation among genotypes in terms of all traits other than biological yield and straw yield. Generally, all the study traits showed a negative response to drought stress and the mean of each trait declined at stressed condition while that of traits such as harvest index, 1000 grain weight, internodes number, awn length and phonological traits were increased under the condition of drought stress after anthesis. Most of the damages resulted from drought stress after anthesis, have been made on the grain yield which results from the dramatic decrease of grain weight due to drought occurring during grain formation period. Results from phenotypic correlations, step by step regression and path analysis showed that among the components of yield, in terms of priority awn length and grain filling period should be increased in order to increase the grain yield under the condition of drought stress after anthesis stage,. In addition, among the components of grain yield, in terms of priority harvest index, biological yield and straw yield should be increased in order to increase grain yield under the condition of normal irrigation. Also, due to water supply restrictions, straw yield should be decreased at the expense of grain yield in order to increase the harvest index.
Authors and Affiliations
Vahid Mollasadeghi, Amir Garib Eshghi, Reza Shahryari and Reza Serajamani
Keywords
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