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Grain yield performance of heat stress tolerant maize hybrids under heat prone areas of Pakistan

Author: Issa, A.B.
Author: Maqbool, M.A.
Author: Khokhar, E.S.
Author: Anwar, M.W.
Author: Imtiaz, M.
Year: 2018
Abstract: Heat stress has seriously adverse effects on growth, development and yield of maize. Heat stress during reproductive growth stages may reduce the yield by 101Kg ha day (Smith,1996). Extremely high temperature (45-48 C) during reproductive growth stages has drastic effects on maize productivity (Ulukan, 2009). Productivity losses in maize are attributed to flower abortion, desiccation of pollen grains & silk, reduced pollen viability & germination, fertilization failure and reduced seed size under heat stress (Sinsawat,2004). Leaf growth is reduced at 35 – 40 C while beyond that temperature there is serious reduction in photosynthesis, protein denaturation, inhibition of protein biosynthesis and enzyme inactivation are reported (Wahid et al., 2007). Day temperature may rise above 45 C in major maize growing areas of Punjab, Pakistan during spring season. Therefore, deployment of heat stress tolerant maize varieties is among the coping strategies to mitigate the increasing challenge of maize farming in Pakistan.
Format: PDF
Language: English
Publisher: CIMMYT
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: Presentation
Place of Publication: [Mexico]
Pages: 1 page
Agrovoc: YIELDS

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This item appears in the following Collection(s)

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

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