Physiological responses related to increased grain yield under drought in the first biotechnology‐derived drought‐tolerant maize

Nemali, Krishna; Bonin, Christopher; Dohleman, Frank G.; Stephens, Mike; Reeves, William R.; Nelson, Donald E.; Castiglioni, Paolo; Whitsel, Joy E.; Sammons, Bernard; Silady, Rebecca A.; Anstrom, Donald; Sharp, Robert E.; Patharkar, O. Rahul; Clay, David E.; Coffin, Marie; Nemeth, Margaret A.; Leibman, Mark; Luethy, Michael H.; Lawson, Mark

doi:10.1111/pce.12446

Cited by 94 publications

(81 citation statements)

References 42 publications

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“…There have been copious reports of breakthroughs related to yield improvement and stress tolerance through biotechnology approaches, both in model species (Karaba et al, ; Kirst, Gabilly, Niyogi, Lemaux, & Melis, ; Kromdijk et al, ; Miwa, Takano, & Fujiwara, ; Sade et al, ; Van Camp, ), and in crops (Castiglioni et al, ; Nelson et al, ; Nuccio et al, ; Preuss et al, ; Rice et al, , Nemali et al, ). In many cases, there are reports of yield improvement with limited number of tested environments, and in no known cases, are there reports across multiple germplasm.…”

Section: Discussionmentioning

confidence: 99%

Evaluating maize phenotypic variance, heritability, and yield relationships at multiple biological scales across agronomically relevant environments

Tucker

Dohleman

Flagel

et al. 2020

Plant Cell & Environment

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A challenge to improve an integrative phenotype, like yield, is the interaction between the broad range of possible molecular and physiological traits that contribute to yield and the multitude of potential environmental conditions in which they are expressed. This study collected data on 31 phenotypic traits, 83 annotated metabolites, and nearly 22,000 transcripts from a set of 57 diverse, commercially relevant maize hybrids across three years in central U.S. Corn Belt environments. Although variability in characteristics created a complex picture of how traits interact produce yield, phenotypic traits and gene expression were more consistent across environments, while metabolite levels showed low repeatability. Phenology traits, such as green leaf number and grain moisture and whole plant nitrogen content showed the most consistent correlation with yield. A machine learning predictive analysis of phenotypic traits revealed that ear traits, phenology, and root traits were most important to predicting yield. Analysis suggested little correlation between biomass traits and yield, suggesting there is more of a sink limitation to yield under the conditions studied here. This work suggests that continued improvement of maize yields requires a strong understanding of baseline variation of plant characteristics across commercially‐relevant germplasm to drive strategies for consistently improving yield.

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Section: Discussionmentioning

confidence: 99%

Evaluating maize phenotypic variance, heritability, and yield relationships at multiple biological scales across agronomically relevant environments

Tucker

Dohleman

Flagel

et al. 2020

Plant Cell & Environment

Self Cite

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“…Another study by Chang et al (2014) reported that no evidence suggested the cspB transgene in the corn hybrid evaluated impacted shoot or root architecture or yield when grown in moderate-to high-yield environments. Nemali et al (2014) reported the DT corn expressing the cspB transgene trait averaged 6% higher yields compared to the control under water-limited conditions, but there were no consistent results under well-watered conditions.…”

Section: Introductionmentioning

confidence: 94%

Response of Drought Tolerant and Conventional Corn to Limited Irrigation

Kisekka¹,

Lamm²,

Holman³

2015

Kansas Agricultural Experiment Station Research Reports

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“…Monsanto’s “DroughtGuard” maize (MON87460) expressing Bacillus subtilis cold shock protein B (cspB) (Castiglioni et al, 2008) which produced 6% higher grain yield across years than the control (Monsanto hybrid NH6212) under water-limited conditions (Nemali et al, 2015) was cultivated on ≥50,000 ha in the United States during the first year after release (Marshall, 2014). New genes conferring drought and heat stress adaptation are being discovered and the experimental area sown to drought or heat stress tolerant crops containing transgene(s) is expected to grow as more countries become involved in the development and field testing of such crops.…”

Section: Synthesismentioning

confidence: 99%

Using Biotechnology-Led Approaches to Uplift Cereal and Food Legume Yields in Dryland Environments

Dwivedi¹,

Siddique

Farooq

et al. 2018

Front. Plant Sci.

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Drought and heat in dryland agriculture challenge the enhancement of crop productivity and threaten global food security. This review is centered on harnessing genetic variation through biotechnology-led approaches to select for increased productivity and stress tolerance that will enhance crop adaptation in dryland environments. Peer-reviewed literature, mostly from the last decade and involving experiments with at least two seasons’ data, form the basis of this review. It begins by highlighting the adverse impact of the increasing intensity and duration of drought and heat stress due to global warming on crop productivity and its impact on food and nutritional security in dryland environments. This is followed by (1) an overview of the physiological and molecular basis of plant adaptation to elevated CO2 (eCO2), drought, and heat stress; (2) the critical role of high-throughput phenotyping platforms to study phenomes and genomes to increase breeding efficiency; (3) opportunities to enhance stress tolerance and productivity in food crops (cereals and grain legumes) by deploying biotechnology-led approaches [pyramiding quantitative trait loci (QTL), genomic selection, marker-assisted recurrent selection, epigenetic variation, genome editing, and transgene) and inducing flowering independent of environmental clues to match the length of growing season; (4) opportunities to increase productivity in C3 crops by harnessing novel variations (genes and network) in crops’ (C3, C4) germplasm pools associated with increased photosynthesis; and (5) the adoption, impact, risk assessment, and enabling policy environments to scale up the adoption of seed-technology to enhance food and nutritional security. This synthesis of technological innovations and insights in seed-based technology offers crop genetic enhancers further opportunities to increase crop productivity in dryland environments.

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Physiological responses related to increased grain yield under drought in the first biotechnology‐derived drought‐tolerant maize

Abstract: ABSTRACT

Cited by 94 publications

References 42 publications

Evaluating maize phenotypic variance, heritability, and yield relationships at multiple biological scales across agronomically relevant environments

Evaluating maize phenotypic variance, heritability, and yield relationships at multiple biological scales across agronomically relevant environments

Response of Drought Tolerant and Conventional Corn to Limited Irrigation

Using Biotechnology-Led Approaches to Uplift Cereal and Food Legume Yields in Dryland Environments

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