| 1. |
- Jin, Yunkai, et al.
(författare)
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New Energy Crops for Biofuel Production
- 2015
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Ingår i: Handbook of clean energy systems. - Chichester, UK : John Wiley & Sons, Ltd. - 9781118388587 ; , s. 49-62
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Bokkapitel (refereegranskat)
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| 2. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Genome and Environment Based Prediction Models and Methods of Complex Traits Incorporating Genotype × Environment Interaction
- 2022
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Ingår i: Complex Trait Prediction : Methods and Protocols. - New York, NY : Springer US. - 9781071622049 ; :2467, s. 245-283
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Bokkapitel (refereegranskat)abstract
- 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) interaction, which most of the time increases the prediction performance when the response of lines are different from environment to environment. In this chapter, we describe a historical timeline since 2012 related to advances of the GS models that take into account G × E interaction. We describe theoretical and practical aspects of those GS models, including the gains in prediction performance when including G × E structures for both complex continuous and categorical scale traits. Then, we detailed and explained the main G × E genomic prediction models for complex traits measured in continuous and noncontinuous (categorical) scale. Related to G × E interaction models this review also examine the analyses of the information generated with high-throughput phenotype data (phenomic) and the joint analyses of multitrait and multienvironment field trial data that is also employed in the general assessment of multitrait G × E interaction. The inclusion of nongenomic data in increasing the accuracy and biological reliability of the G × E approach is also outlined. We show the recent advances in large-scale envirotyping (enviromics), and how the use of mechanistic computational modeling can derive the crop growth and development aspects useful for predicting phenotypes and explaining G × E.
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| 3. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Peanut improvement for human health
- 2014
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Ingår i: Plant Breeding Reviews: Volume 38. - Hoboken, New Jersey : John Wiley & Sons, Inc.. - 9781118916834 ; 38, s. 143-185
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Bokkapitel (refereegranskat)abstract
- Peanut (Arachis hypogaea L., Fabaceae) is an energy-dense and nutritious food. Regular consumption of peanuts improves human health. Oil content and oil quality, which is determined by variation in oleic (O) and linoleic (L) fatty acids, are important seed quality traits in peanut. Aflatoxin (produced by fungus Aspergillus flavus and Aspergillus parasiticus) is a serious health problem, whereas peanut allergy is a potentially life-threatening and often lifelong food allergy. High O/L ratio increases shelf life of peanut products and, therefore, their marketability. Germplasm and advanced breeding lines with oil content as high as 55–60% and O/L ratio ranging from 7:1 to 40:1 are available for use in peanut breeding. Global warming has a significant impact on the nutritional quality of food crops. Identification of germplasm with stable seed quality traits will be a prerequisite to initiate quality breeding in peanut. Peanut cultivars with high oleate content, developed by conventional breeding and selection, are widely grown in the United States. Marker-aided backcross breeding has led to the development of ‘Tifguard High O/L’ peanut cultivar in the United States. Enough genetic variation in seed iron and zinc content has been noted, but targeted breeding for these micronutrients in peanut is yet to begin. Peanut is devoid of β-carotene—a precursor of vitamin A. Using a cotyledon-based Agrobacterium-mediated genetic transformation system and the maize psyI gene driven by the At oleosin promoter, β-carotene-rich transgenic peanuts have been achieved. Transgenic peanuts with the antifungal gene cpo-p inhibited A. flavus hyphal growth or those containing the Rchit gene have shown a broader spectrum of resistance against fungal infection including A. flavus. Knocking out genes for the allergenic proteins, using targeting-induced local lesions in genomes (TILLING) or RNAi approaches, has shown promise to derive mutants or transgenic events lacking allergenic seed proteins, with no adverse effect on seed quality or viability. These genetic stocks when available to researchers may lead to breeding agronomically superior nutritionally enhanced peanut cultivars, which will be free from allergens and toxins.
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| 4. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Genetics and cytogenetics of the potato
- 2020
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Ingår i: The potato crop : its agricultural, nutritional and social contribution to humankind. - Cham : Springer International Publishing. - 9783030286828 ; , s. 219-247
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Bokkapitel (refereegranskat)abstract
- Tetraploid potato (Solanum tuberosum L.) is a genetically complex, polysomic tetraploid (2n = 4x = 48), highly heterozygous crop, which makes genetic research and utilization of potato wild relatives in breeding difficult. Notwithstanding, the potato reference genome, transcriptome, resequencing, and single nucleotide polymorphism (SNP) genotyping analysis provide new means for increasing the understanding of potato genetics and cytogenetics. An alternative approach based on the use of haploids (2n = 2x = 24) produced from tetraploid S. tuberosum along with available genomic tools have also provided means to get insights into natural mechanisms that take place within the genetic load and chromosomal architecture of tetraploid potatoes. This chapter gives an overview of potato genetic and cytogenetic research relevant to germplasm enhancement and breeding. The reader will encounter findings that open new doors to explore inbred line breeding in potato and strategic roads to access the diversity across the polyploid series of this crop's genetic resources. The text includes classical concepts and explains the foundations of potato genetics and mechanisms underlying natural cytogenetics phenomena as well as their breeding applications. Hopefully, this chapter will encourage further research that will lead to successfully develop broad-based potato breeding populations and derive highly heterozygous cultivars that meet the demands of having a resilient crop addressing the threats brought by climate change.
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| 5. |
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| 6. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Genomic Selection : State of the Art
- 2017
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Ingår i: Genetic Improvement of Tropical Crops. - Cham : Springer International Publishing. - 9783319598178 ; , s. 19-54
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Bokkapitel (refereegranskat)
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| 7. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Integration of Next-generation Sequencing Technologies with Comparative Genomics in Cereals
- 2016
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Ingår i: Plant Genomics. - : InTech. - 9789535124566 ; , s. 29-44
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Bokkapitel (refereegranskat)abstract
- Cereals are the major sources of calories worldwide. Their production should be high to achieve food security, despite the projected increase in global population. Genomics research may enhance cereal productivity. Genomics immensely benefits from robust next-generation sequencing (NGS) techniques, which produce vast amounts of sequence data in a time and cost-efficient way. Research has demonstrated that gene sequences among closely related species that share common ancestry have remained well conserved over millions of years of evolution. Comparative genomics allows for comparison of genome sequences across different species, with the implication that genomes with large sizes can be investigated using closely related species with smaller genomes. This offers prospects of studying genes in a single species and, in turn, gaining information on their functions in other related species. Comparative genomics is expected to provide invaluable information on the control of gene function in complex cereal genomes, and also in designing molecular markers across related species. This chapter discusses advances in sequencing technologies, their application in cereal genomics and their potential contribution to the understanding of the relationships between the different cereal genomes and their phenotypes.
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| 8. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Marker-aided breeding revolutionizes twenty-first century crop improvement
- 2012
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Ingår i: Seed development: omics technologies toward improvement of seed quality and crop yield. - Dordrecht : Springer Netherlands. - 9789400747487 ; , s. 435-452
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The ever increasing human population always needs more healthy and nutritious food, produced in environmentally sustainable ways. Marker-aided breeding significantly contributes towards this priority goal. Molecular markers are mainly identifiable DNA sequences present in the genome and follow the Mendelian inheritance. In present time, a broad range of molecular markers are available for various crops. Advances in crop genome sequencing, high resolution genetic mapping, and precise phenotyping largely help the discovery of functional alleles and allelic variation associated with traits of interest for plant breeding. This chapter provides a brief overview on DNA markers and their use in crop breeding with examples in rice (as the model for inbreeding species) and maize (as an out-crossing species). Molecular marker-aided breeding undoubtedly speeds the conventional breeding process and makes crop improvement more precise. Availability of physical maps, genomes sequences, and high-throughput technologies will also facilitate in developing new molecular breeding approaches in this twenty-first century.
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| 9. |
- Ortiz Rios, Rodomiro Octavio
(författare)
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Transgenic Vegetable Breeding for Nutritional Quality and Health Benefits: A Review
- 2022
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Ingår i: Emerging Trends in Disease and Health Research Volume 4. - 9789355473608 ; , s. 36-52
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- 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 people worldwide are malnourished. Vegetables can aid in the prevention of malnutrition-related illnesses. Vegetable breeders can use genetic engineering to add desired transgenes into elite cultivars, greatly increasing their value. It also provides one-of-a-kind chances to improve nutritional quality and provide other health benefits. Many vegetable crops have been genetically modified to improve features like nutritional value or flavor, as well as to minimize bitterness and anti-nutritional elements. Transgenic veggies can also be utilized to deliver vaccines. Consumers may profit even more from eating more nutritious transgenic veggies; for example, increasing crop carotenoids through metabolic sink manipulation via genetic engineering appears to be possible in some crops. Ca uptake may be boosted by genetically engineering carrots with higher Ca levels, reducing the occurrence of calcium shortages such osteoporosis. The lack of this micronutrient, which severely inhibits organ function, will be remedied by fortified transgenic lettuce with zinc. Transgenic tomatoes with folate levels that give a complete adult daily requirement can also help to overcome folate insufficiency, which is considered a global health problem. Genetic engineering has also become an ideal tool to develop anthocyanin-rich tomatoes. Transgenic lettuce with higher levels of tocopherol and resveratrol may help to prevent coronary artery disease and arteriosclerosis, as well as cancer chemoprevention. Transgenic techniques can help improve food safety and health advantages; for example, rural African resource poor consumers will gain from consuming cyanide-free cassava varieties. Growers and consumers will accept biotechnology-derived vegetable crops if clear benefits and safety are demonstrated.
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| 10. |
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