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Rodomiro Ortiz   Dr.  Senior Scientist or Principal Investigator 
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Rodomiro Ortiz published an article in January 2019.
Top co-authors See all
Rajeev Varshney

312 shared publications

International Crops Research Institute for the Semi-Arid Tropics

Robert Henry

290 shared publications

Queensland Alliance for Agriculture and Food Innovation, University of Queensland, Brisbane, QLD, 4072, Australia

Henry T. Nguyen

223 shared publications

College of Agriculture, Food & Natural Resources; Division of Plant Sciences, Univ. of Missouri, Columbia, MO 65211

Jacqueline Batley

133 shared publications

School of Biological Sciences, The University of Western Australia, Australia

Masahiro Yano

129 shared publications

Institute of Crop Science, NARO (National Agriculture and Food Research Organization), Tsukuba, Ibaraki, Japan

28
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300
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Distribution of Articles published per year 
(2006 - 2019)
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published in
 
18
 
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BOOK-CHAPTER 0 Reads 0 Citations Change in Production Practices: The Role of Agri-Food and Diversified Cropping Systems Sangam L. Dwivedi, Rodomiro Ortiz Published: 01 January 2019
Encyclopedia of Food Security and Sustainability, doi: 10.1016/b978-0-08-100596-5.22378-0
DOI See at publisher website
Article 1 Read 0 Citations Using Biotechnology-Led Approaches to Uplift Cereal and Food Legume Yields in Dryland Environments Sangam L. Dwivedi, Kadambot H. M. Siddique, Muhammad Farooq,... Published: 27 August 2018
Frontiers in Plant Science, doi: 10.3389/fpls.2018.01249
DOI See at publisher website ABS Show/hide abstract
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.
Article 0 Reads 2 Citations Genetic Basis and Breeding Perspectives of Grain Iron and Zinc Enrichment in Cereals Ana Luisa Garcia-Oliveira, Subhash Chander, Rodomiro Ortiz, ... Published: 02 July 2018
Frontiers in Plant Science, doi: 10.3389/fpls.2018.00937
DOI See at publisher website ABS Show/hide abstract
Micronutrient deficiency, also known as “hidden hunger,” is an increasingly serious global challenge to humankind. Among the mineral elements, Fe (Iron) and Zn (Zinc) have earned recognition as micronutrients of outstanding and diverse biological relevance, as well as of clinical importance to global public health. The inherently low Fe and Zn content and poor bioavailability in cereal grains seems to be at the root of these mineral nutrient deficiencies, especially in the developing world where cereal-based diets are the most important sources of calories. The emerging physiological and molecular understanding of the uptake of Fe and Zn and their translocation in cereal grains regrettably also indicates accumulation of other toxic metals, with chemically similar properties, together with these mineral elements. This review article emphasizes breeding to develop bioavailable Fe- and Zn-efficient cereal cultivars to overcome malnutrition while minimizing the risks of toxic metals. We attempt to critically examine the genetic diversity regarding these nutritionally important traits as well as the progress in terms of quantitative genetics. We sought to integrate findings from the rhizosphere with Fe and Zn accumulation in grain, and to discuss the promoters as well as the anti-nutritional factors affecting Fe and Zn bioavailability in humans while restricting the content of toxic metals.
Article 0 Reads 0 Citations Durum Wheat Breeding: In the Heat of the Senegal River Amadou T. Sall, Filippo M. Bassi, Madiama Cisse, Habibou Gue... Published: 02 July 2018
Agriculture, doi: 10.3390/agriculture8070099
DOI See at publisher website ABS Show/hide abstract
Global warming may cause +4 °C temperature increases before the end of this century. Heat tolerant bred-germplasm remains the most promising method to ensure farm productivity under this scenario. A global set of 384 durum wheat accessions were exposed to very high temperatures occurring along the Senegal River at two sites for two years. The goal was to identify germplasm with enhanced tolerance to heat. There was significant variation for all traits. The genetic (G) effect accounted for >15% of the total variation, while the genotype by environment interaction (G × E) reached 25%. A selection index that combines G and a G × E wide adaptation index was used to identify stable high yielding germplasm. Forty-eight accessions had a stable grain yield above the average (2.7 t ha−1), with the three top lines above 3.5 t ha−1. Flowering time, spike fertility and harvest index were the most critical traits for heat tolerance, while 1000-kernel weight and spike density only had environment-specific effects. Testing of six subpopulations for grain yield across heat-prone sites revealed an even distribution among clusters, thus showing the potential of this panel for dissecting heat tolerance via association genetics.
Article 0 Reads 9 Citations Diversifying Food Systems in the Pursuit of Sustainable Food Production and Healthy Diets Sangam L. Dwivedi, Edith T. Lammerts Van Bueren, Salvatore C... Published: 01 October 2017
Trends in Plant Science, doi: 10.1016/j.tplants.2017.06.011
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Increasing demand for nutritious, safe, and healthy food because of a growing population, and the pledge to maintain biodiversity and other resources, pose a major challenge to agriculture that is already threatened by a changing climate. Diverse and healthy diets, largely based on plant-derived food, may reduce diet-related illnesses. Investments in plant sciences will be necessary to design diverse cropping systems balancing productivity, sustainability, and nutritional quality. Cultivar diversity and nutritional quality are crucial. We call for better cooperation between food and medical scientists, food sector industries, breeders, and farmers to develop diversified and nutritious cultivars that reduce soil degradation and dependence on external inputs, such as fertilizers and pesticides, and to increase adaptation to climate change and resistance to emerging pests. Intensive industrial agriculture does not appear to be sustainable and does not contribute to a healthy human diet.Reduced consumption of livestock products and increased use of plant products are central to reducing food carbon footprints and healthy eating.Fundamental to better health is understanding gene–nutrient interactions in growth and development and in disease prevention; genomics and phenomics may assist selecting for nutritionally enhanced, resource use-efficient, and stress-resilient cultivars.A paradigm shift is occurring from the current production/productivity goals to developing nutritionally enhanced and resource use-efficient crops.There is growing notion that not all healthy diets are sustainable and not all sustainable diets are healthy, thus an integral system approach will be necessary to produce sufficient, safe, and nutritionally enhanced food. The Importance of Seed Biology for Food SecurityJump to SectionThe Importance of Seed Biology for Food SecurityDiet × Gene Interaction and Human HealthHolistic Versus Reductionist Approach to Food and Human HealthCarbon Footprints in Relation to the Energy and Nutrient Density of FoodsAdopting Cropping Systems That Enhance Nutritional DiversityHas Pursuit of Increased Yield Compromised Biodiversity and Nutritional Quality?Developing Resource Use-Efficient and Nutritionally Enhanced Crops Evolutionary Breeding Genomic-Assisted Breeding Breeding for Resource Use Efficiency and Stress-Prone Sites Breeding Nutritious Crops Trade-OffSystems Approach to Environmental Sustainability and Human HealthConcluding RemarksAcknowledgmentsReferencesCurrent global issues under debate include the decline of biodiversity (see GlossaryGlossary), climate change and greenhouse gas emissions (GHGEs), hunger and malnutrition, and poverty and water scarcity. Diet related-diseases such as diabetes and those associated with being overweight and obese are additional global problems. We review here and lay open how all these issues are related to different aspects of seed production (i.e., yield, quality, genetic features, and trade). The delivery of agricultural innovations such as bred-seeds also requires long-term funding for plant sciences (Box 1Box 1).Box 1Agricultural Innovations Require Funding for Plant SciencesInnovations often arise not from planned research but from unexpected sources. For example, modern biology benefited from the discovery of Taq polymerase from photosynthetic organisms found along a thermal gradient in Yellowstone National Park [135xThe value of basic research: discovery of Thermus aquaticus and other extreme thermophiles. Brock, T.D. Genetics. 1997; 146: 1207–1210PubMedSee all References][135], which brought immense benefits to medicine and industrial agriculture. Had D.F. Jones at Bussey Institution in Harvard University, G.H. Shull at Cold Spring Harbor, or E.M. East at Connecticut State College not begun their experiments to understand heterosis, farmers would have continued to grow open-pollinated cultivars [136x90 years ago: the beginning of hybrid maize. Crow, J.F. Genetics. 1998; 148: 923–928PubMedSee all References, 137xPlant Breeding in the Omics Era. Ortiz Ríos, R. Crossref | Scopus (0)See all References]. This discovery of heterotic effects in crop productivity led to significant agricultural innovations, for example, hybrid maize emerged from being unknown at the beginning of the 20th Century to being grown by most US farmers by the mid-century [137xPlant Breeding in the Omics Era. Ortiz Ríos, R. Crossref | Scopus (0)See all References][137]. These examples highlight how investments in basic research lead to making discoveries of significant importance to society.Investments in plant sciences at large contribute to enhancing both productivity and sustainability, thus accelerating agricultural growth, building resilience to changing climates or to stress-prone environments, and developing agro-ecosystems with reduced GHGE. Concerns about global food shortages in the 20th century triggered a surge in public and private investment in agricultural research-for-development (AR4D), which led to the emergence of the ‘green revolution’ that has had a significant impact on agriculture, the environment, and livelihoods, worldwide [138xRe-visiting the green revolution: seeking innovations for a changing world. Ortiz, R. Chron. Hortic. 2011; 51: 6–11Crossref | Scopus (10)See all References][138]. Thereafter, the United Nations suggested that nations should at least spend 1% of agricultural gross domestic product on AR4D, but this differs widely between regions and countries.Anxiety over food security resurfaced when food prices increased substantially towards the end of past decade, leading to political unrest in many parts of the world. This situation largely ensued because of a decline in public investments in plant sciences (including AR4D) after the green revolution, which led to a slowdown in productivity growth among the main cereals, such as rice and wheat. By contrast, multinational corporations invested heavily in the seed business, particularly focusing on major crops and F1 hybrids with major return of investment, such as maize, rapeseed, canola, and cotton, and use patents to protect their intellectual property rights. As a result, the private sector assumed an increasing share of AR4D and ownership of emerging (bio)technologies [139xCreating an effective process to define, approve and review the research agenda of institutions in the developing world. Ortiz, R. and Crouch, J.H. : 65–92Crossref | Scopus (3)See all References][139], which could influence changes in the strategic direction of plant sciences. Furthermore, the supply of products and other research outputs as international public goods (IPGs) has become increasingly constrained by variable funding. There has recently also been a push towards downstream product adaptation and dissemination in international AR4D, instead of carrying out innovation and product development. The unintended consequences of this declining funding and its switch towards adaptive research could be a break in the research pipeline that provides IPGs that enhance sustainable agricultural productivity growth [140xGreen revolution: impacts, limits, and the path ahead. Pingali, P.L. Proc. Natl. Acad. Sci. U. S. A. 2012; 109: 12302–12308Crossref | PubMed | Scopus (131)See all References, 141xTranslating knowledge about abiotic stress tolerance to breeding programmes. Gilliham, M. et al. Plant J. 2017; 90: 898–917Crossref | PubMed | Scopus (2)See all References]. Policymakers should remember that funding to plant sciences needs to keep pace to permit ongoing innovations to increase food availability, assure its affordability, and enhance its nutritional content and safety, such that the population can maintain a healthy and active life.Diet × Gene Interaction and Human HealthJump to SectionThe Importance of Seed Biology for Food SecurityDiet × Gene Interaction and Human HealthHolistic Versus Reductionist Approach to Food and Human HealthCarbon Footprints in Relation to the Energy and Nutrient Density of FoodsAdopting Cropping Systems That Enhance Nutritional DiversityHas Pursuit of Increased Yield Compromised Biodiversity and Nutritional Quality?Developing Resource Use-Efficient and Nutritionally Enhanced Crops Evolutionary Breeding Genomic-Assisted Breeding Breeding for Resource Use Efficiency and Stress-Prone Sites Breeding Nutritious Crops Trade-OffSystems Approach to Environmental Sustainability and Human HealthConcluding RemarksAcknowledgmentsReferencesThe microbiota in the gut play an essential role in human health. The evidence to date suggests that the gut microbiota is involved in malnutrition and obesity, and dietary intervention impacts on gut microbial diversity and human health [1xImpact of diet in shaping gut microbiota revealed by a comparative study in children from Europe and rural Africa. De Filippo, C. et al. Proc. Natl. Acad. Sci. U. S. A. 2010; 107: 14691–14696Crossref | PubMed | Scopus (1340)See all References, 2xGut microbiota composition correlates with diet and health in the elderly. Claesson, M.J. et al. Nature. 2012; 488: 178–184Crossref | PubMed | Scopus (725)See all References, 3xGut microbiota and malnutrition. Million, M. et al. Microb. Pathog. 2017; 106: 127–138Crossref | PubMed | Scopus (2)See all References].The increase in the prevalence and progression of chronic (non-communicable) diseases associated with the modern human diet, relative to that of hunter-gatherers [4xOrigins and evolution of the Western diet: health implications for the 21st century. Cordain, L. et al. Am. J. Clin. Nutr. 2005; 81: 341–354PubMedSee all References][4], is the consequence of a complex interplay between genetic and environmental factors, of which diet plays an important role. The average effects of diet are masked by individual genetic predispositions, and genetic variants showing robust associations with differences in dietary patterns are present in diverse ethnic groups. For example, individuals carrying SIRT6 rs10
Article 1 Read 6 Citations Assessing and Exploiting Functional Diversity in Germplasm Pools to Enhance Abiotic Stress Adaptation and Yield in Cerea... Armin Scheben, Sangam L Dwivedi, David Edwards, Charles Spil... Published: 29 August 2017
Frontiers in Plant Science, doi: 10.3389/fpls.2017.01461
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
There is a need to accelerate crop improvement by introducing alleles conferring host plant resistance, abiotic stress adaptation, and high yield potential. Elite cultivars, landraces and wild relatives harbor useful genetic variation that needs to be more easily utilized in plant breeding. We review genome-wide approaches for assessing and identifying alleles associated with desirable agronomic traits in diverse germplasm pools of cereals and legumes. Major quantitative trait loci and single nucleotide polymorphisms (SNPs) associated with desirable agronomic traits have been deployed to enhance crop productivity and resilience. These include alleles associated with variation conferring enhanced photoperiod and flowering traits. Genetic variants in the florigen pathway can provide both environmental flexibility and improved yields. SNPs associated with length of growing season and tolerance to abiotic stresses (precipitation, high temperature) are valuable resources for accelerating breeding for drought-prone environments. Both genomic selection and genome editing can also harness allelic diversity and increase productivity by improving multiple traits, including phenology, plant architecture, yield potential and adaptation to abiotic stresses. Discovering rare alleles and useful haplotypes also provides opportunities to enhance abiotic stress adaptation, while epigenetic variation has potential to enhance abiotic stress adaptation and productivity in crops. By reviewing current knowledge on specific traits and their genetic basis, we highlight recent developments in the understanding of crop functional diversity and identify potential candidate genes for future use. The storage and integration of genetic, genomic and phenotypic information will play an important role in ensuring broad and rapid application of novel genetic discoveries by the plant breeding community. Exploiting alleles for yield-related traits would allow improvement of selection efficiency and overall genetic gain of multigenic traits. An integrated approach involving multiple stakeholders specializing in management and utilization of genetic resources, crop breeding, molecular biology and genomics, agronomy, stress tolerance, and reproductive/seed biology will help to address the global challenge of ensuring food security in the face of growing resource demands and climate change induced stresses.
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