Limited-transpiration trait may increase maize drought tolerance in the US corn belt

Messina, Carlos D., Sinclair, Thomas R., Hammer, Graeme L., Curan, Dian, Thompson, Jason, Oler, Zac, Gho, Carla and Cooper, Mark (2015) Limited-transpiration trait may increase maize drought tolerance in the US corn belt. Agronomy Journal, 107 6: 1978-1986. doi:10.2134/agronj15.0016

Author Messina, Carlos D.
Sinclair, Thomas R.
Hammer, Graeme L.
Curan, Dian
Thompson, Jason
Oler, Zac
Gho, Carla
Cooper, Mark
Title Limited-transpiration trait may increase maize drought tolerance in the US corn belt
Journal name Agronomy Journal   Check publisher's open access policy
ISSN 1435-0645
Publication date 2015-08-14
Sub-type Article (original research)
DOI 10.2134/agronj15.0016
Volume 107
Issue 6
Start page 1978
End page 1986
Total pages 9
Place of publication Madison, WI, United States
Publisher American Society of Agronomy
Language eng
Formatted abstract
Yield loss due to water deficit is ubiquitous in maize (Zea mays L.) production environments in the United States. The impact of water deficits on yield depends on the cropping system management and physiological characteristics of the hybrid. Genotypic diversity among maize hybrids in the transpiration response to vapor pressure deficit (VPD) indicates that a limited-transpiration trait may contribute to improved drought tolerance and yield in maize. By limiting transpiration at VPD above a VPD threshold, this trait can increase both daily transpiration efficiency and water availability for late-season use. Reduced water use, however, may compromise yield potential. The complexity associated with genotype × environment × management interactions can be explored in a quantitative assessment using a simulation model. A simulation study was conducted to assess the likely effect of genotypic variation in limited-transpiration rate on yield performance of maize at a regional scale in the United States. We demonstrated that the limited-transpiration trait can result in improved maize performance in drought-prone environments and that the impact of the trait on maize productivity varies with geography, environment type, expression of the trait, and plant density. The largest average yield increase was simulated for drought-prone environments (135 g m–2), while a small yield penalty was simulated for environments where water was not limiting (–33 g m–2). Outcomes from this simulation study help interpret the ubiquitous nature of variation for the limited-transpiration trait in maize germplasm and provide insights into the plausible role of the trait in past and future maize genetic improvement.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: QAAFI Biological Information Technology (QBIT) Publications
Official 2016 Collection
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