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Agronomy 2017, 7(2), 30; doi:10.3390/agronomy7020030

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

1
Department of Genetics and Plant Breeding, Bihar Agricultural College, Sabour, Bihar 813210, India
2
International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Telangana 502324, India
*
Author to whom correspondence should be addressed.
Academic Editor: Urmila Basu
Received: 3 March 2017 / Revised: 7 April 2017 / Accepted: 11 April 2017 / Published: 20 April 2017
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Abstract

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. View Full-Text
Keywords: groundnut; heat stress; pod yield; high temperature; partitioning of assimilates; tolerance indices; heritability groundnut; heat stress; pod yield; high temperature; partitioning of assimilates; tolerance indices; heritability
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MDPI and ACS Style

Akbar, A.; Singh Manohar, S.; Tottekkaad Variath, M.; Kurapati, S.; Pasupuleti, J. Efficient Partitioning of Assimilates in Stress-Tolerant Groundnut Genotypes under High-Temperature Stress. Agronomy 2017, 7, 30.

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