EVALUATION OF FINGER MILLET GERMPLASM FOR CELLULAR LEVEL TOLERANCE: IT’S RELEVANCE TO MOISTURE STRESS
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Date
2015-07-17
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Finger millet (Eleusine coracana (L.) Gaertn.) is an important staple food crop in
southern Karnataka which meets the regional food security. Despite being a C4 species
intermittent moisture stress under rainfed conditions, results in reduced productivity.
Therefore, improving productivity under water limiting conditions has immense
importance. This necessitates identification of stable donors responsive to drought. In this
study, 194 accessions were screened for cellular level tolerance (CLT) using temperature
induction response technique (TIR). To determine the relevance of CLT, these accessions
were further evaluated under field conditions to arrive at drought susceptibility index
(DSI). The CLT not related to DSI, indicating that CLT may not be the only the factors
leading to improved productivity under water limiting conditions. Based on CLT and
DSI, two sets of contrasting lines namely GE-1332 and GE-208 and GE-1830 and GE-50
were selected in targeted expression of specific drought responsive genes namely TAF-6,
CIPK and SRP. The expressions pattern did not match with the observed CLT/DSI. This
trend needs to be examined screen the accessions differing in root traits.
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