Identification of traits related to drought resistance in peanut (Arachis hypogaea L.)

Painawadee, M. and Jogloy, S. and Kesmala, T. and Akkasaeng, C. and Patanothai, A. (2009) Identification of traits related to drought resistance in peanut (Arachis hypogaea L.). Asian Journal of Plant Sciences, 8 (2). pp. 120-128.

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Abstract

The aim of this study was to investigate whether some root characters and physiological characters are related to drought resistance in some elite germplasm lines earlier identified as drought resistant based on pod yield. Four peanut genotypes were tested in a pot experiment under two soil moisture levels [Field Capacity (FC) and 1/3 available water (1/3 AW)]. A 2x4 factorial experiment was laid out in RCBD with six replications. Data were recorded for Relative Water Content (RWC), Specific Leaf Area (SLA), SPAD Chlorophyll Meter Reading (SCMR), root and biomass at 70 days after planting. Root characters, biomass production, pod yield and Harvest Index (HI) were recorded at harvest and Drought Tolerance Index (DTI) for these traits were also calculated. Differences between water treatments were also significant for RWC, SLA, Root Dry Weight (RDW) and biomass but not significant for SCMR, harvest index and pod yield. Drought stress reduced RWC, SLA, RDW and biomass but had no significant effect on SCMR, harvest index and pod yield. Significant differences among peanut genotypes were found for SLA at both water treatments. ICGV 98353 had the lowest SLA at both water treatments. Peanut genotypes were significantly different for RDW and RWC at 1/3 AW only. KK 4 had the highest RDW. ICGV 98324 performed best for RWC and it also had the highest DTI for RWC. ICGV 98324 also had the highest SCMR, which was significantly different among peanut genotypes at FC

Item Type: Article
Author Affiliation: Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khan Kaen University, Muang, Khan Kaen 40002, Thailand
Subjects: Crop Improvement
Crop Improvement > Genetics/Genomics
Divisions: Groundnut
Depositing User: Mr T L Gautham
Date Deposited: 16 Mar 2011 20:28
Last Modified: 16 Mar 2011 20:28
Official URL: http://scialert.net/qredirect.php?doi=ajps.2009.12...
URI: http://eprints.icrisat.ac.in/id/eprint/1643

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