Indian Journal of Agricultural Research
Chief EditorV. Geethalakshmi
Print ISSN 0367-8245
Online ISSN 0976-058X
NAAS Rating 5.60
SJR 0.293
Chief EditorV. Geethalakshmi
Print ISSN 0367-8245
Online ISSN 0976-058X
NAAS Rating 5.60
SJR 0.293
Temperature Induction Response (TIR) - A novel physiological approach for thermotolerant genotypes in chickpea (Cicer arietinum L.)
Submitted21-04-2017|
Accepted10-05-2017|
First Online 19-06-2017|
Chickpea (Cicer arietinum L.) is an important food legume cultivated in arid and semi-arid regions of the world. It is known that chickpea thrives well under drought prone condition. However, heat stress during reproductive development can cause significant yield loss and there is a greater variability for yield performance of chickpea under heat stress. It is extremely important to develop screening tools for identification of thermotolerant chickpea genotypes in view of increase in average global temperatures. In this context, a lab experiment was conducted to standardize the temperature induction response (TIR) protocol for chickpea seedlings using WGC-450 programmable plant growth chamber. Temperatures were standardized as sub lethal i.e. challenging temperatures as 38-480C (for 4 hours &30 min) and lethal temperatures as 500C (for 3 hours). This technique can be used as a potential tool to identify and select temperature tolerant lines at the seedling stage from a large population. A set of diverse chickpea germplasm comprising of 57 genotypes were screened for intrinsic tolerance using the standardized Thermo Induced Response (TIR) protocol. Among the genotypes NBeG-528,NBeG-458,NBeG-511,NBeG-177,NBeG-747,NBeG-732 and VIHAR showed highest thermo tolerance in terms of higher seedling survival with no reduction in root and shoot growth. The genotypes with intrinsic heat tolerance can be explored for the development of varieties suitable for late sown conditions in Andhra Pradesh where chickpea is prone to terminal heat stress.
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