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Genotype-by-environment interaction effects under heat stress in tropical maize

Creator: Vinayan, M.T.
Creator: Zaidi, P.H.
Creator: Seetharam, K.
Creator: Das, R.R.
Creator: Viswanadh, S.
Creator: Ahmed, S.
Creator: Miah, M.A.
Creator: Koirala, K.B.
Creator: Tripathi, M.P.
Creator: Arshad, M.
Creator: Pandey, K.
Creator: Chaurasia, R.
Creator: Kuchanur, P.H.
Creator: Patil, A.
Creator: Mandal, S.S.
Year: 2020
Language: English
Publisher: MDPI
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
Type: Article
Place of Publication: Basel (Switzerland)
Issue: 12
Volume: 10
DOI: 10.3390/agronomy10121998
Keywords: Vapor Pressure Deficit
Keywords: Target Population of Environments
Description: Spring maize area has emerged as a niche market in South Asia. Production of maize during this post-rainy season is often challenged due to heat stress. Therefore, incorporating heat stress resilience is an important trait for incorporation in maize hybrids selected for deployment in this season. However, due to the significant genotype × environment interaction (GEI) effects under heat stress, the major challenge lies in identifying maize genotypes with improved stable performance across locations and years. In the present study, we attempted to identify the key weather variables responsible for significant GEI effects, and identify maize hybrids with stable performance under heat stress across locations/years. The study details the evaluation of a set of prereleased advanced maize hybrids across heat stress vulnerable locations in South Asia during the spring seasons of 2015, 2016 and 2017. Using factorial regression, we identified that relative humidity (RH) and vapor pressure deficit (VPD) as the two most important environmental covariates contributing to the large GEI observed on grain yield under heat stress. The study also identified reproductive stage, starting from tassel emergence to early grain-filling stage, as the most critical crop stage highly susceptible to heat stress. Across-site/year evaluation resulted in identification of six high yielding heat stress resilient hybrids.
Agrovoc: MAIZE
Agrovoc: YIELDS
Related Datasets:
ISSN: 2073-4395
Journal: Agronomy
Article number: 1998

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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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