Journal Title
Title of Journal: Acta Physiol Plant
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Abbravation: Acta Physiologiae Plantarum
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Publisher
Springer-Verlag
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Authors: Maciej T Grzesiak Izabela Marcińska Franciszek Janowiak Andrzej Rzepka Tomasz Hura
Publish Date: 2012/03/10
Volume: 34, Issue: 5, Pages: 1757-1764
Abstract
The effects of drought stress on seedlings’ growth and grain yield of 13 single cross maize hybrids and 11 breeding lines and cultivars of spring triticale were studied in greenhouse and field experiments In the field experiment the drought susceptibility index DSIGY was calculated by determining the change in grain yield GY in conditions with two soil moisture levels IR irrigated D drought In the greenhouse experiment the response to soil drought was evaluated using DSIDW by determining changes in the dry weight DW of vegetative plant parts Marked variations in GY and DW were observed among the studied genotypes In control conditions the GY and DW in droughtsensitive genotypes were higher compared to the droughtresistant ones but in drought conditions the decreases in GY and DW in resistant genotypes were smaller than in droughtsensitive ones DSIGY and DSIDW revealed variations in the degree of drought tolerance among the examined maize and triticale genotypes The values of DSIGY in the field experiment and DSIDW in the greenhouse experiment enabled a division of the studied genotypes into droughtresistant or sensitive groups A close correlation between DSIGY and DSIDW was found The positive linear correlation and determination coefficients between DSIGY and DSIDW were statistically significant P = 005 being equal to R 2 = 0614 maize and R 2 = 0535 triticale The ranking of the studied genotypes based on DSIGY was in most cases consistent with the ranking based on DSIDW which indicates that genetically conditioned drought tolerance is similar for plants in the seedling and reproductive growth stages or may at least partly have a common genetic background
Keywords:
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