Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize
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. Ho...
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doaj-40fcedf19f444df9ab64cfe4b9e132042021-04-02T16:36:53ZengMDPI AGAgronomy2073-43952020-12-01101998199810.3390/agronomy10121998Genotype-by-Environment Interaction Effects under Heat Stress in Tropical MaizeVinayan MT0PH Zaidi1K Seetharam2Reshmi Rani Das3S Viswanadh4Salahuddin Ahmed5Md. Alamgir Miah6KB Koirala7Mahendra Prasad Tripathi8Mohammad Arshad9Kamal Pandey10Ramesh Chaurasia11Prakash Kuchanur12Ayyanagouda Patil13Shyam S Mandal14International Maize and Wheat Improvement Center, c/o ICRISAT, Hyderabad 502324, IndiaInternational Maize and Wheat Improvement Center, c/o ICRISAT, Hyderabad 502324, IndiaInternational Maize and Wheat Improvement Center, c/o ICRISAT, Hyderabad 502324, IndiaInternational Maize and Wheat Improvement Center, c/o ICRISAT, Hyderabad 502324, IndiaInternational Maize and Wheat Improvement Center, c/o ICRISAT, Hyderabad 502324, IndiaBangladesh Agricultural Research Institute, Gazipur 1701, BangladeshBangladesh Agricultural Research Institute, Gazipur 1701, BangladeshNational Maize Research Program, Rampur 44209, NepalNational Maize Research Program, Rampur 44209, NepalMaize and Millets Research Institute, Sahiwal 57000, PakistanCorteva AgriScience Pvt. Ltd., Hyderabad 5000, IndiaKaveri Seeds Pvt. Ltd., Hyderabad 5000, IndiaUniversity of Agricultural Sciences, Raichur 584101, IndiaUniversity of Agricultural Sciences, Raichur 584101, IndiaBihar Agricultural University, Sabour 813210, IndiaSpring 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 (<i>RH</i>) and vapor pressure deficit (<i>VPD</i>) 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.https://www.mdpi.com/2073-4395/10/12/1998genotype × environment interactionheat stressmaizeyieldclimate changerelative humidity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Vinayan MT PH Zaidi K Seetharam Reshmi Rani Das S Viswanadh Salahuddin Ahmed Md. Alamgir Miah KB Koirala Mahendra Prasad Tripathi Mohammad Arshad Kamal Pandey Ramesh Chaurasia Prakash Kuchanur Ayyanagouda Patil Shyam S Mandal |
spellingShingle |
Vinayan MT PH Zaidi K Seetharam Reshmi Rani Das S Viswanadh Salahuddin Ahmed Md. Alamgir Miah KB Koirala Mahendra Prasad Tripathi Mohammad Arshad Kamal Pandey Ramesh Chaurasia Prakash Kuchanur Ayyanagouda Patil Shyam S Mandal Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize Agronomy genotype × environment interaction heat stress maize yield climate change relative humidity |
author_facet |
Vinayan MT PH Zaidi K Seetharam Reshmi Rani Das S Viswanadh Salahuddin Ahmed Md. Alamgir Miah KB Koirala Mahendra Prasad Tripathi Mohammad Arshad Kamal Pandey Ramesh Chaurasia Prakash Kuchanur Ayyanagouda Patil Shyam S Mandal |
author_sort |
Vinayan MT |
title |
Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize |
title_short |
Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize |
title_full |
Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize |
title_fullStr |
Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize |
title_full_unstemmed |
Genotype-by-Environment Interaction Effects under Heat Stress in Tropical Maize |
title_sort |
genotype-by-environment interaction effects under heat stress in tropical maize |
publisher |
MDPI AG |
series |
Agronomy |
issn |
2073-4395 |
publishDate |
2020-12-01 |
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 (<i>RH</i>) and vapor pressure deficit (<i>VPD</i>) 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. |
topic |
genotype × environment interaction heat stress maize yield climate change relative humidity |
url |
https://www.mdpi.com/2073-4395/10/12/1998 |
work_keys_str_mv |
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