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Climate-resilient maize varieties are improving yields for smallholders in sub-Saharan Africa and Asia. Continued genetic gains and faster variety replacement are crucial for adapting maize crops to climate change.

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Area of Science:

  • Agricultural Science
  • Plant Breeding
  • Climate Change Adaptation

Background:

  • Maize yields in sub-Saharan Africa (SSA) and Asia are highly susceptible to climate shocks, impacting food security.
  • Significant advancements have been made in developing and distributing climate-resilient maize varieties over the last decade.
  • Commercialization of drought-tolerant maize seed in SSA and development of heat-tolerant varieties in South Asia show promising progress.

Purpose of the Study:

  • To highlight the progress in climate-resilient maize development and deployment in SSA and Asia.
  • To emphasize the importance of genetic gains and variety replacement for smallholder farmers.
  • To underscore the need for continued efforts in adapting maize to changing climatic conditions.

Main Methods:

  • Review of commercialization data for drought-tolerant maize in SSA.
  • Assessment of progress in developing heat-tolerant maize varieties in South Asia.
  • Analysis of factors influencing variety replacement and adoption rates.

Main Results:

  • Over 70,000 metric tonnes of drought-tolerant maize seed commercialized in 13 SSA countries by 2016, benefiting 53 million people.
  • Substantial progress in developing and deploying elite heat-tolerant maize varieties in South Asia.
  • Evidence of increased genetic gain in grain yield under stress-prone environments.

Conclusions:

  • Climate-resilient maize strategies are vital for protecting smallholder farmers in SSA and Asia from climate variability.
  • Intensified engagement with seed companies is essential for accelerating the replacement of obsolete varieties.
  • Continued genetic improvement and faster deployment are key to ensuring future maize productivity under climate change.