Rodomiro Ortiz

Rodomiro Ortiz
Swedish University of Agricultural Sciences | SLU · Department of Plant Breeding

PhD

About

678
Publications
223,704
Reads
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15,871
Citations
Introduction
I engage on genetic research and plant breeding. My experience in self- and cross-pollinated species, which have disomic and polysomic inheritance, sexual and vegetative propagation, plus annual and perennial production, provides me a good conceptual underpinning of plant breeding and genetics, as well as knowledge for the sustainable use of genetic resources in crop improvement. My work uses wild species and landrace germplasm for breeding resistance, stress adaptation, resource use and quality
Additional affiliations
August 2011 - November 2020
Swedish University of Agricultural Sciences
Position
  • Professor
June 2010 - June 2011
Consultative Group on International Agricultural Research
Position
  • part-time Science Advisor
January 2010 - June 2010
International Maize and Wheat Improvement Center
Position
  • Consultant
Education
September 1988 - February 1991
University of Wisconsin–Madison
Field of study
  • Plant Genetics & Plant Breeding
April 1982 - December 1983
Universidad Nacional Agraria La Molina
Field of study
  • Plant Breeding
September 1981 - April 1983
Universidad Nacional Agraria La Molina
Field of study
  • Capsicum spp. genetic resources

Publications

Publications (678)
Article
Association analysis is used to measure relations between markers and quantitative trait loci (QTL). Their estimation ignores genes with small effects that trigger underpinning quantitative traits. By contrast, genome-wide selection estimates marker effects across the whole genome on the target population based on a prediction model developed in th...
Article
The annual harvest of banana and plantain (Musa spp.) is approximately 145 millions tons worldwide. About 85% of this global production comes from small plots and kitchen or backyard gardens from the developing world, and only 15% goes to the export trade. Musa acuminata and M. balbisiana are the ancestors of several hundreds of parthenocarpic Musa...
Article
Climate change could strongly affect the wheat crop that accounts for 21% of food and 200 million hectares of farmland worldwide. This article reviews some of the approaches for addressing the expected effects that climate change may likely inflict on wheat in some of the most important wheat growing areas, namely germplasm adaptation, system manag...
Article
Full-text available
Background Emeritus Campbell-Bascom Professor Stanley J. Peloquin was an internationally renowned plant geneticist and breeder who made exceptional contributions to the quantity, quality and sustainable supply of food for the world from his innovative and extensive scientific contributions. For five decades, Dr Peloquin merged basic research in pla...
Article
Full-text available
Linkage disequilibrium can be used for identifying associations between traits of interest and genetic markers. This study used mapped diversity array technology (DArT) markers to find associations with resistance to stem rust, leaf rust, yellow rust, and powdery mildew, plus grain yield in five historical wheat international multienvironment trial...
Book
Full-text available
El desarrollo de la agricultura es un desafío mundial para el futuro. ¿Cómo podemos transferir los logros de la investigación a la agricultura actual para que la industria pueda contribuir al desarrollo sostenible del planeta, sin aumentar la carga sobre el medio ambiente?. Algunos creen que la solución está en una transición a métodos agrícolas má...
Article
Full-text available
Genetic gains (ΔG) are determined by the breeders' equation ΔG = [(ck σ2G)/(y σP)], where c, k and y are the parental control, a function of the selection intensity and number of years to complete one selection cycle, respectively, while σ2G and are σP the genetic variance and the square root of the phenotypic variance. Plant breeding programs shou...
Article
Full-text available
Background The genetic diversity and population structure of breeding germplasm is central knowledge for crop improvement. To gain insight into the genetic potential of the germplasm used for potato breeding in a Nordic breeding program as well as all available accessions from the Nordic genebank (NordGen), 133 potato genotypes were genotyped using...
Article
Full-text available
Genomic resources and tools are essential for improving crops and conserving their genetic resources. Guizotia abyssinica (noug), an outcrossing edible oilseed crop, has highly limited genomic resources. Hence, RNA-Seq-based transcriptome sequencing of 30 noug genotypes was performed to generate novel genomic resources and assess their usefulness....
Article
Full-text available
Eleusine coracana (L.) Gaertn., commonly known as finger millet, is a multipurpose crop used for food and feed. Genomic tools are required for the characterization of crop gene pools and their genomics-led breeding. High-throughput sequencing-based characterization of finger millet germplasm representing diverse agro-ecologies was considered an eff...
Article
Full-text available
Malnutrition, unhealthy diets, and lifestyle changes are the major risk factors for overweight and obesity-linked chronic diseases in humans adversely impact achieving sustainable development goals. Colored grains are a source of anthocyanins, a group of flavonoids, that contribute positively to human health. This review focuses on genetic variatio...
Chapter
This article discusses recent attempts to characterize and modify nutrients and bioactive compounds in vegetable crops by using transgenic approaches. Malnutrition and unhealthy diets have become major risk factors for non-communicable diseases. Vegetables are an important part of a well-balanced diet. Due to unbalanced diets, around 3 billion peop...
Article
Full-text available
Malnutrition, unhealthy diets, and lifestyle changes have become major risk factors for non-communicable diseases while adversely impacting economic growth and sustainable development. Anthocyanins, a group of flavonoids that are rich in fruits and vegetables, contribute positively to human health. This review focuses on genetic variation harnessed...
Article
Full-text available
Potato breeding must improve its efficiency by increasing the reliability of selection as well as identifying a promising germplasm for crossing. This study shows the prediction accuracy of genomic-estimated breeding values for several potato (Solanum tuberosum L.) breeding clones and the released cultivars that were evaluated at three locations in...
Preprint
Full-text available
Malnutrition, unhealthy diets, and lifestyle changes have become major risk factors for non-communicable diseases while ad-versely impacting economic growth and sustainable development. Anthocyanins, a group of flavonoids that are rich in fruits and vegetables, contribute positively to human health. This review focuses on genetic variation harnesse...
Article
Full-text available
P. aeruginosa strain FG106 was isolated from the rhizosphere of tomato plants and identified through morphological analysis, 16S rRNA gene sequencing, and whole-genome sequencing. In vitro and in vivo experiments demonstrated that this strain could control several pathogens on tomato, potato, taro, and strawberry. Volatile and non-volatile metaboli...
Article
Full-text available
The aim of this review was to give an overview regarding key points of potato germplasm enhancement associated with the International Potato Center and its global research-for-development partners including feedback from technology and germplasm recipients. Highlights were addressed on the participation by Japanese scholars to CIP. Also, specific i...
Article
Full-text available
The breeding of new cultivars is a powerful approach to increase both the quantity and quality of potato harvest per land unit. The aim of this research was to determine using multi-site testing the progress made by the genetic enhancement of potato in Sweden in the last 1.5 decades by comparing advanced breeding clones (T 4 upwards) bred in Sweden...
Chapter
Full-text available
Genomic-enabled prediction models are of paramount importance for the successful implementation of genomic selection (GS) based on breeding values. As opposed to animal breeding, plant breeding includes extensive multienvironment and multiyear field trial data. Hence, genomic-enabled prediction models should include genotype × environment (G × E) i...
Article
Full-text available
Potato breeding aims to improve crop productivity, quality and resilience based on heritable characteristics. Estimating the trait heritability and correlations—both genetic and phenotypic—among characteristics in a target population of environments allows us to define the best breeding method that leads to selection gains. Breeding clones (47) and...
Poster
Full-text available
Peruvian maize possesses a wide morphological diversity, comprising hundreds of landraces grown from sea level (sl) up to 3,500 m above sl. Research based on morphological descriptors defined at least 52 Peruvian maize races within the boundaries of Peru, among 180 races present today in the territorial range of the Central Andean region encompasse...
Preprint
Full-text available
The genetic diversity and population structure of breeding germplasm is central knowledge for crop improvement. To gain insight into the genetic potential of the germplasm used for potato breeding in a Nordic breeding program as well as the collections from the Nordic genebank (NordGen), 133 potato genotypes were genotyped using the Infinium Illumi...
Preprint
Full-text available
The genetic diversity and population structure of breeding germplasm is central knowledge for crop improvement. To gain insight into the genetic potential of the germplasm used for potato breeding in a Nordic breeding program as well as all av available accessions from the Nordic genebank (NordGen), 133 potato genotypes were genotyped using the Inf...
Article
Full-text available
Red clover (Trifolium pratense) is one of the most important fodder crops worldwide. The knowledge of genetic diversity among red clover populations, however, is under development. This study provides insights into its genetic diversity, using single nucleotide polymorphism (SNP) markers to define population structure in wild and cultivated red clo...
Article
Full-text available
Potato breeding relies heavily on visual phenotypic scoring for clonal selection. Obtaining robust phenotypic data can be labor intensive and expensive, especially in the early cycles of a potato breeding program where the number of genotypes is very large. We have investigated the power of genomic estimated breeding values (GEBVs) for selection fr...
Article
Full-text available
East African highland bananas ( Musa spp. AAA group) are an important staple in the Great Lakes region of East Africa. Their production has declined due to pests and diseases. Breeding for host plant resistance is a sustainable option for addressing this challenge. Understanding the relationships between growth parameters and bunch weight (i.e., yi...
Article
Full-text available
East African highland bananas (Musa spp. AAA group) are an important staple in the Great Lakes region of East Africa. Their production has declined due to pests and diseases. Breeding for host plant resistance is a sustainable option for addressing this challenge. Understanding the relationships between growth parameters and bunch weight (i.e., yie...
Article
Full-text available
Finger millet (Eleusine coracana (L.) Geartn.) is a self-pollinating amphidiploid crop cultivated with minimal input for food and feed, as well as a source of income for small-scale farmers. To efficiently assess its genetic diversity for conservation and use in breeding programs, polymorphic DNA markers that represent its complex tetraploid genome...
Article
Full-text available
With the rapid population growth, there is an urgent need for innovative crop improvement approaches to meet the increasing demand for food. Classical crop improvement approaches involve, however, a backbreaking process that cannot equipoise with increasing crop demand. RNA-based approaches i.e., RNAi-mediated gene regulation and the site-specific...
Article
Full-text available
Tradeoffs among plant traits help maintain relative fitness under unpredictable conditions and maximize reproductive success. However, modifying tradeoffs is a breeding challenge since many genes of minor effect are involved. The intensive crosstalk and fine tuning between growth and defense responsive phytohormones via transcription factors optimi...
Article
The sustainable intensification of agriculture appears to be an ideal approach to achieve food and nutrition security, preserve agrobiodiversity and maintain ecosystem health. A cafeteria approach based on distinct, place-based economic and agroecosystem dynamics is recommended. Crop diversification and conservation-based management benefits system...
Article
Full-text available
The aim of this study was to evaluate the potential of noug as a source for human nutrition. Diverse noug genotypes were evaluated for their content and/or composition of total lipids, fatty acids, proteins, and minerals using standard methods. The total lipid content (32.5–45.7%) and the proportion of an essential fatty acid, linoleic acid (72.2–7...
Article
Full-text available
Citation: Tsehay, S.; Ortiz, R.; Geleta, M.; Bekele, E.; Tesfaye, K.; Johansson, E. Nutritional Profile of the Ethiopian Oilseed Crop Noug (Guizotia Abyssinica Cass.): Opportunities for Its Improvement as a Source for Human Nutrition. Foods 2021, 10,
Article
Full-text available
Noug (Guizotia abyssinica) is an outcrossing oilseed crop that serves as a source of edible oil and other nutrients although its seed yield is generally low. The analysis of agro-morphological traits in relation to seed and oil yields is important for improving the productivity of this crop. The present study aimed at assessing the variation and he...
Article
Full-text available
Modern plant breeding is still a time-consuming and costly process, even with the most advanced technologies such as gene editing. Hence, there is an urgent need to develop alternative means for plant trait manipulation and plant protection. RNA interference (RNAi) is a conserved cellular mechanism mediated by naturally occurring double-stranded RN...
Article
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The Founding and Honorary Editor of the journal Crop Breeding, Genetics and Genomics, Professor Longping Yuan (袁隆平) died on 22nd May 2021 in Changsha (People’s Republic of China). We will remember him as the great scientist who produced the first high yielding rice hybrid. As noticed elsewhere, Longping Yuan (Figure 1) succeeded in delivering some...
Preprint
Full-text available
With the rapid population growth, there is an urgent need for innovative crop improvement approaches to meet the increasing demand for food. Classical crop improvement approaches involve, however, a backbreaking process that cannot equipoise with increasing crop demand. RNA based approaches i.e. RNAi-mediated gene regulation and site-specific nucle...
Article
Full-text available
Focused Identification of Germplasm Strategy (FIGS) has been advocated as an efficient approach to predict and harness variation in adaptive traits in genebanks or wild populations of plants. However, a weakness of the current FIGS approach is that it only utilizes a priori knowledge of one evolutionary factor: natural selection. Further optimizati...
Article
Introduction-'Agbagba'-a popular false-horn plantain (Musa sp. AAB) cultivar in Nigeria was evaluated alongside three other maternally related genotypes ('Mbi-Egome', 'PITA 14' and 'PITA 24') under different nutrient management systems, with the aim of developing a sustainable approach for nutrition of plantains. 'Mbi-Egome' is a French-type cultiv...
Article
Full-text available
Improving sorghum resistance is a sustainable method to reduce yield losses due to anthracnose, a devastating disease caused by Colletotrichum sublineola. Elucidating the molecular mechanisms of sorghum-C. sublineola interactions would help identify biomarkers for rapid and efficient identification of novel sources for host-plant resistance improve...
Article
Full-text available
Seeds are valuable sources of carbohydrates, lipids, proteins, fibers, minerals, and vitamins. They provide energy and nutrition to germinating seedlings, food to humans, feed to livestock, and feedstocks to industry. High-throughput analyses of gene expression in crops has identified many candidate genes associated with seed dormancy, longevity, g...
Presentation
Full-text available
Food for Thought: Genetic Gains in Banana and Plantain Breeding in Africa Plant breeding programs must deliver high rates of genetic gain (ΔG) to address the Sustainable Development Goal 2 “Zero Hunger” of UN’s Agenda 2030, due to the continuous demand for more food under a changing climate. The One CGIAR crop breeding programs aim to deliver abov...
Article
Full-text available
Polyploidy means having more than two basic sets of chromosomes. Polyploid plants may be artificially obtained through chemical, physical and biological (2n gametes) methods. This approach allows an increased gene scope and expression, thus resulting in phenotypic changes such as yield and product quality. Nonetheless, breeding new cultivars throug...
Preprint
Full-text available
Polyploidy means having more than two basic sets of chromosomes. Polyploid plants may be artificially obtained through chemical, physical and biological (2n gametes) methods. This approach allows an increased gene scope and expression, thus resulting in phenotypic changes such as yield and product quality. Nonetheless, breeding new cultivars throug...
Article
Green Revolution' genes have led to the release of input-responsive cultivars, resulting in multifold productivity increases in rice and wheat. Declining precipitation, increased intensity of drought and rising temperature are casting uncertainty over agricultural production. As noted in this minireview, plant genes when overexpressed allow cereals...
Preprint
Full-text available
Polyploidy is a condition of having more than two sets of chromosomes. Polyploid plants may be artificially obtained through chemical, physical and biological methods (2n gametes). It is considered an interesting approach due to increased genescope and expression, thus resulting in phenotypic changes, such as yield and product quality. Nonetheless,...
Article
Full-text available
Tanzania has been growing avocado for decades. A wide variability of the avocado germplasm has been found, and the crop is largely contributing to the earnings of the farmers, traders , and the government, but its genetic diversity is scantly investigated. With the purpose of comparing morphological and genetic characteristics of this germplasm and...
Article
Full-text available
This review highlights advances regarding seed phytate or phytase activity in cultigen gene pools and suggests how to organize cost-effective breeding programs for developing low seed phytate cultivars. The use of modern biotechnology effectively untangled negative pleiotropic effects associated with low phytate grains. A moderate reduction of seed...
Chapter
Full-text available
La diversidad es la palabra clave para describir la agricultura en Sudamérica. El clima en constante cambio, la variada geografía natural y humana, el aumento de la urbanización y los nuevos patrones de consumo dan lugar a diferentes tipos de agricultura, que a menudo coexisten en los mismos territorios. Si bien la agricultura en Bolivia, Chile y P...
Article
Full-text available
Modern potato breeding methods following a genomic-led approach provide means for shortening breeding cycles and increasing breeding efficiency across selection cycles. Acquiring genetic data for large breeding populations remains expensive. We present a pipeline to reduce the number of single nucleotide polymorphisms (SNPs) to lower the cost of ge...
Article
The exploitation of sunflower (Helianthus annuus L.) seed and other parts for human nutrition, medicine and the industry Abstract: Sunflower is cultivated around the globe to meet various nutritional, medicinal and industrial needs. The seed is a rich source of edible oil, protein, vitamins, antioxidants and other micronutrients. It is considered a...
Article
Full-text available
The development and use of genomic resources are essential for understanding the population genetics of crops for their efficient conservation and enhancement. Noug (Guizotia abyssinica) is an economically important oilseed crop in Ethiopia and India. The present study sought to develop new DNA markers for this crop. Transcriptome sequencing was co...
Article
Introduction – The effect of fertilizer-use on fruit nutritional qualities of four plantain genotypes were determined. Materials and methods – Proximate composition, minerals, heavy metals and vitamin contents of two cultivars (‘Agbagba’ and ‘Mbi-Egome’) and two bred-hybrids (‘PITA 14’ and ‘PITA 24’) were evaluated across three fertilizer treatment...
Article
Full-text available
Hereditas began with articles on plants since its first issue in May 1920 (six out of eight) and continued with more original articles (43% of the total of this journal) on plants (of which 72% of those in plants were on crops) until today. In December 1922, the 140-page article The Genotypical Response of the Plant Species to the Habitat by evolut...
Article
Full-text available
Background Heterobeltiosis is the phenomenon when the hybrid’s performance is superior to its best performing parent. Banana (Musa spp. AAA) breeding is a tedious, time-consuming process, taking up to two decades to develop a consumer acceptable hybrid. Exploiting heterobeltiosis in banana breeding will help to select breeding material with high co...
Article
Full-text available
Domestication of a new crop requires identification and improvement of desirable characteristics Field cress (Lepidium campestre) is being domesticated as a new oilseed crop, particularly for northern temperate regions.. In the present study, an F2 mapping population and its F3 progenies were used to identify quantitative trait loci (QTLs) for plan...
Article
Full-text available
Aims: To create genetic variability, produce seeds and ultimately develop disease resistant and agronomically desirable hybrids with good organoleptic quality bunches. Study Design: Multiple hand pollinations/ crosses in possible combinations of 2x, 3x and 4x as maternal/ seed and paternal/ pollen parents. Original Research Article Wilson et al.; A...
Article
Full-text available
Background: Avocado is an important cash crop in Tanzania, however its genetic diversity is not thoroughly investigated. This study was undertaken to explore the genetic diversity of avocado in the southern highlands using microsatellite markers. A total of 226 local avocado trees originating from seeds were sampled in eight districts of the Mbeya...