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当前位置: 首页 > 文章 > Heat-tolerant maize for rainfed hot, dry environments in the lowland tropics: From breeding to improved seed delivery 作物学报(英文版) 2023,11 (4)
Position: Home > Articles > Heat-tolerant maize for rainfed hot, dry environments in the lowland tropics: From breeding to improved seed delivery The Crop Journal 2023,11 (4)

Heat-tolerant maize for rainfed hot, dry environments in the lowland tropics: From breeding to improved seed delivery

作  者：
P.H. Zaidi;M.T. Vinayan;Sudha Nair;P. H. Kuchanur;Ramesh Kumar;Shyam Bir Singh;M. P. Tripathi;Ayyanagouda Patil;A. Salahuddin;Athar Hussain;Atul P Kulkarni;Passang Wangmo;Mitchell R. Tuinstra;Boddupalli M. Prasann
单  位：
ICAR-Indian Institute of Maize Research, Ludhiana-141001, Bihar, India;National Maize Research Program, Rampur, Chitwan-44200, Nepal;Bangladesh Wheat and Maize Research Institute, Dinajpur-5201, Bangladesh;International Maize and Wheat Improvement Center (CIMMYT), Hyderabad-502324, India;Maize and Millet Research Institute, Yusafwala, Sahiwal-57000, Pakistan;University of Agricultural Sciences, Raichur-584104, Karnataka, India;Institute of Plant Sciences, Purdue University, West Lafayette, IN 47906, USA;International Maize and Wheat Improvement Center (CIMMYT), Nairobi, Keny;Agriculture Research and Development Centre, Wengkhar-43001, Bhutan
关键词：
Climate change;Drought;Heat stress;Lowland tropics;Maize;Vapor pressure defici
摘  要：
Climate change-induced heat stress combines two challenges: high day-and nighttime temperatures, and physiological water deficit due to demand-side drought caused by increase in vapor-pressure deficit. It is one of the major factors in low productivity of maize in rainfed stress-prone environments in South Asia, affecting a large population of smallholder farmers who depend on maize for their sustenance and livelihoods. The International Maize and Wheat Improvement Center (CIMMYT) maize program in Asia, in partnership with public-sector maize research institutes and private-sector seed companies in South Asian countries, is implementing an intensive initiative for developing and deploying heat-tolerant maize that combines high yield potential with resilience to heat and drought stresses. With the integration of novel breeding tools and methods, including genomics-assisted breeding, doubled haploidy, field-based precision phenotyping, and trait-based selection, new maize germplasm with increased tolerance to heat stress is being developed for the South Asian tropics. Over a decade of concerted effort has resulted in the successful development and release of 20 high-yielding heat-tolerant maize hybrids in CIMMYT genetic backgrounds. Via public-private partnerships, eight hybrids are presently being deployed on over 50,000 ha in South Asian countries, including Bangladesh, Bhutan, India, Nepal, and Pakistan. (c) 2023 Crop Science Society of China and Institute of Crop Science, CAAS. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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