Morpho-Physiological Parameters Associated with Iron Deficiency Chlorosis Resistance and Their Effect on Yield and Its Related Traits in Groundnut

Boodi, I H and Pattanashetti, S K and Biradar, B D and Naidu, G K and Chimmad, V P and Kanatti, A and Kumar, V and Debnath, M K (2016) Morpho-Physiological Parameters Associated with Iron Deficiency Chlorosis Resistance and Their Effect on Yield and Its Related Traits in Groundnut. Journal of Crop Science and Biotechnology, 19 (02). pp. 177-187. ISSN 1975-9479

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Abstract

Iron deficiency chlorosis (IDC) causes a significant reduction in yield of groundnut grown in calcareous and alkaline soils in India. The main aim of the study was to assess genotypic differences for morpho-physiological parameters associated with IDC resistance across different stages and their effect on yield and its related traits. The factorial pot experiment was comprised of two major factors, i) soil-Fe status [normal-Fe, deficit-Fe], and ii) genotypes [five] with differential IDC response, constituting 10 treatments. They were assessed for five morpho-physiological parameters associated with IDC resistance across five crop growth stages and also yield and its related traits. Associations between these traits were also estimated. Under deficit-Fe conditions, IDC resistant genotypes recorded significantly lower visual chlorosis rating (VCR), higher SPAD values, active Fe, chlorophyll content, peroxidase activity, and high yield compared to susceptible ones. Between normal- to deficit-Fe soils, resistant compared to susceptible genotypes showed no change in VCR scores; a lower reduction in SPAD, chlorophyll, active Fe, peroxidase activity, and pod yield. Under deficit-Fe conditions, high yield among resistant genotypes could be attributed to higher seed weight, number of pods and haulm yield, while contrasting reduction in main stem height and number of primaries. The results indicate that for initial large-scale screening of groundnut genotypes for IDC resistance, SPAD values are most ideal while active Fe could be utilized for confirmation of identified lines.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Iron deficiency chlorosis, Groundnut, Morpho-physiological parameters, Peanut, Yield-related traits, Groundnut
Subjects: Mandate crops > Groundnut
Depositing User: Mr Ramesh K
Date Deposited: 13 Sep 2016 06:37
Last Modified: 13 Sep 2016 06:39
URI: http://oar.icrisat.org/id/eprint/9638
Official URL: http://dx.doi.org/10.1007/s12892-016-0005-8
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: This research work was done as part of post-graduation research of first author and also as part of staff research project granted to second author by the Directorate of Research, University of Agricultural Sciences, Dharwad 580005 (India).
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