Raghavendra, T. and Jayalakshmi, V. and Babu, D.V. (2017) Temperature Induction Response (TIR) - A novel physiological approach for thermotolerant genotypes in chickpea (Cicer arietinum L.). Indian Journal of Agricultural Research, 51 (3). pp. 252-256.
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Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Chickpea, Lethal temperature, Sub-lethal temperatures, Thermotolerance |
| Author Affiliation: | Department of Crop Physiology, Acharya N.G. Ranga Agricultural University, Nandyal-518 501, A.P., India |
| Subjects: | Crop Improvement |
| Divisions: | Chickpea |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 07 Nov 2017 03:23 |
| Last Modified: | 07 Nov 2017 03:23 |
| Official URL: | http://dx.doi.org/10.18805/ijare.v51i03.7914 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/15135 |
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