Efficient Partitioning of Assimilates in Stress-Tolerant Groundnut Genotypes under High-Temperature Stress

Akbar, A and Manohar, S S and Variath, M T and Sadaiah, K and Janila, P (2017) Efficient Partitioning of Assimilates in Stress-Tolerant Groundnut Genotypes under High-Temperature Stress. Agronomy, 7(2) (30). pp. 1-12. ISSN 2073-4395

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Groundnut (Arachis hypogaea L.) genotypes were assessed for pod yield and physiological parameters under heat-stress and non-stress environments. The air temperatures under heat-stress environments were 35 °C and above during flowering, and below 35 °C in non-stress environments. Variability was significant for pod yield and physiological parameters among the genotypes under heat stress. A pod yield reduction of 1.5% to 43.2% was observed under heat-stress environments. However, in heat-tolerant genotypes, either stable or increased pod yield was recorded under high-temperature stress. GJG 31, ICGV 87846, ICGV 03057, ICGV 07038 and GG 20 showed an increase in pod yield by 9.0% to 47.0% at high temperatures, with a 0.65% to 3.6% increase in pod growth rate, while ICGV 06420, ICGV 87128, ICGV 97182, TCGS 1043 and ICGV 03042 are stable for pod yield and recorded a 0.25% to 3.1% increase in pod growth rate. Pod yield, hundred-seed weight, and pod growth rate under heat stress can be used as criteria for selection of heat stress tolerant-genotypes. Based on stress tolerance indices and pod yield performance, ICGVs 07246, 07012, 06039, 06040, 03042, 07038 and 06424 were identified as heat-tolerant genotypes.

Item Type: Article
Divisions: Research Program : Asia
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Groundnut; heat stress; pod yield; high temperature; partitioning of assimilates; tolerance indices; heritability
Subjects: Mandate crops > Groundnut
Depositing User: Mr Ramesh K
Date Deposited: 08 May 2017 10:28
Last Modified: 08 May 2017 10:28
URI: http://oar.icrisat.org/id/eprint/9991
Official URL: http://dx.doi.org/10.3390/agronomy7020030
Acknowledgement: The financial assistance provided by the Bill and Melinda Gates Foundation for student fellowship is profoundly acknowledged. The work is done under CRP-Grain Legumes.
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