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Transgenic Strategies for Improved Drought Tolerance in Legumes of Semi-Arid Tropics

OAR@ICRISAT

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Relation http://oar.icrisat.org/85/
http://dx.doi.org/10.1080/15427520903337095
 
Title Transgenic Strategies for Improved Drought
Tolerance in Legumes of Semi-Arid Tropics
 
Creator Bhatnagar-Mathur, P
Shridhar Rao, J
Vadez, V
Sharma, K K
 
Subject Climate change
 
Description Water deficit is the most prominent abiotic stress that severely limits
crop yields, thereby reducing opportunities to improve livelihoods
of poor farmers in the semi-arid tropics (SAT) where most of the
legumes, including groundnut and chickpea, are grown. Sustained
long-term efforts in developing these legume crops with better
drought tolerance through conventional breeding have been met
with only limited success mainly because of an insufficient understanding
of the underlying physiological mechanisms and lack of
sufficient polymorphism for drought tolerance-related traits. Exhaustive
efforts are being made at the International Crop Research
Institute for Semi-Arid Tropics (ICRISAT) to improve crop productivity
of the SAT crops by comprehensively addressing the constraints
caused by water limitations. The transgenic approach has been
used to speed up the process of molecular introgression of putatively
beneficial genes for rapidly developing stress-tolerant legumes.
Nevertheless, the task of generating transgenic cultivars requires
success in the transformation process and proper incorporation of
stress tolerance into plants. Hence, evaluation of the transgenic
plants under stress conditions and understanding the physiological
effect of the inserted genes at the whole plant level is critical. This
review focuses on the recent progress achieved in using transgenic
technology to improve drought tolerance, which includes evaluation
of drought-stress response and protocols developed for testing
transgenic plants under near-field conditions. A trait-based approach
was considered, in which yield was dissected into components.
 
Publisher Taylor and Francis
 
Date 2010
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/85/1/JCI-2010_review.pdf
Bhatnagar-Mathur, P and Shridhar Rao, J and Vadez, V and Sharma, K K (2010) Transgenic Strategies for Improved Drought Tolerance in Legumes of Semi-Arid Tropics. Journal of Crop Improvement, 24 (1). pp. 92-111.