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|Title:||Physiological and biochemical evaluation for drought tolerance in wheat germplasm collected from arid western plains of India|
|Keywords:||Abiotic stress;Drought susceptibility index;FIGS;Phenotyping;Triticum aestivum|
|Abstract:||Wheat is an important cereal crop and securing an increase in wheat production is necessary to feed the growing population. Integration of drought tolerance into new varieties attracts researchers as it helps to develop climate resilient wheat. Here, we tried to identify new sources of drought tolerance in crops using the targeted germplasm collection approach and to establish the relationship between different morpho-physiological, biochemical traits and stress susceptibility index. A set of 18 wheat genotypes collected using focused identification germplasm strategy (FIGS) was evaluated for drought tolerance at seedling stage. Stress was imposed by keeping the pots at 40 % field capacity for one week followed by watering to allow recovery. Shoot length, shoot dry weight, relative water content, chlorophyll, membrane stability and seedling survival declined, and proline content increased in all the genotypes under stress. Root length and dry root weight also increased in IC333095 and IC112205 in response to water scarcity. Correlation study showed positive correlation between seedling survival and shoot length (0.51), relative water content (0.44) at P<0.05 and shoot dry weight (0.64) and root dry weight (0.70) at P<0.01. Based on different morphological and physiological parameters and drought susceptibility index, IC333095 (0.37), IC615005 (0.44), Dharwad Dry (0.44) and C306 (0.45) were considered drought tolerant genotypes. Further, it was concluded that shoot dry weight, root dry weight, shoot length and relative water content are the most reliable parameters for phenotyping against drought stress at an early stage.|
|ISSN:||0975-0959 (Online); 0301-1208 (Print)|
|Appears in Collections:||IJBB Vol.53(5&6) [October-December 2016]|
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