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Agronomy
Special Issues
Rice and Wheat Breeding: Conventional and Novel Approaches
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Rice and Wheat Breeding: Conventional and Novel Approaches

A special issue of Agronomy (ISSN 2073-4395).

Deadline for manuscript submissions: closed (15 November 2023) | Viewed by 5150

Special Issue Editors

Dr. Youngjun Mo

E-Mail Website
Guest Editor
Department of Crop Science and Biotechnology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea
Interests: rice; wheat; molecular breeding; genetics
Dr. Jianping Zhang

E-Mail Website
Guest Editor
Agriculture and Food, Commonwealth Scientific and Industrial Research Organization (CSIRO), Canberra, ACT 2600, Australia
Interests: wheat; rust disease; molecular resistance breeding; plant innate immunity
Dr. Jae-Sung Lee

E-Mail Website
Guest Editor
Rice Breeding Innovations Platform, International Rice Research Institute, Los Baños, Laguna 4031, Philippines
Interests: rice; germplasm; seed longevity; plant physiology

Special Issue Information

Dear Colleagues,

Rice and wheat are the two most important cereal crops, providing approximately 40% of calories consumed by humans. Thanks to the genetic and agronomic improvements during the Green Revolution in the 1960s and 1970s, wheat and rice yields almost doubled in many countries. Although yield improvements have stagnated since then, recent technological advances in molecular genetics, genomics, transformation, gene editing, phenomics, and speed breeding provide novel opportunities to enhance wheat and rice breeding efficiency and tackle the challenges of increasing population, changing climate, and diversifying market needs. This Special Issue will highlight research efforts in improving various breeding traits of wheat and rice through conventional and novel approaches. Original research articles and reviews are both welcome. We look forward to receiving your contributions.

Dr. Youngjun Mo
Dr. Jianping Zhang
Dr. Jae-Sung Lee
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • wheat
  • rice
  • breeding
  • crop improvement
  • cereal

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Published Papers (3 papers)

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Research

13 pages, 2930 KiB  
Article
Genome-Wide Syntenic and Evolutionary Analysis of 30 Key Genes Found in Ten Oryza Species
by Yeonghun Cho, Insu Lim and Jungmin Ha
Agronomy 2023, 13(8), 2100; https://doi.org/10.3390/agronomy13082100 - 10 Aug 2023
Viewed by 1206
Abstract
Rice is a vital staple food crop worldwide, providing nutrition and sustenance to a significant portion of the global population. The genetic diversity of cultivated rice species has been significantly reduced during domestication, resulting in the loss of favorable alleles. To overcome this [...] Read more.
Rice is a vital staple food crop worldwide, providing nutrition and sustenance to a significant portion of the global population. The genetic diversity of cultivated rice species has been significantly reduced during domestication, resulting in the loss of favorable alleles. To overcome this limitation, wild rice species have been used in introgression breeding programs to introduce beneficial alleles. In this study, we performed syntenic and phylogenetic analyses for 10 Oryza species, comprising both cultivar and wild species. Pairwise syntenic analysis revealed 3885 synteny blocks containing 1,023,342 gene pairs among 10 species. O. nivara contained the most blocks that were syntenous with the other nine species. In total, 425 paralogous and orthologous genes were identified for 30 key genes involved in rice breeding. His1 (43), GS3 (28), and qSW5/GW5 (27) had the most paralogous and orthologous genes. For GS3 and qSW5/GW5, two gene transfer events were detected. These findings have implications for rice breeding strategies, particularly with respect to gene pyramiding and introgression breeding programs. This research will contribute to the development of elite cultivars with improved quality and yield to meet the growing global demand for high-quality rice. Full article
(This article belongs to the Special Issue Rice and Wheat Breeding: Conventional and Novel Approaches)
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10 pages, 1635 KiB  
Article
Characterization of flo4-6, a Novel cyOsPPDKB Allele Conferring Floury Endosperm Characteristics Suitable for Dry-Milled Rice Flour Production
by Su-Kyung Ha, Hyun-Sook Lee, Seung Young Lee, Chang-Min Lee, Youngjun Mo and Ji-Ung Jeung
Agronomy 2023, 13(5), 1306; https://doi.org/10.3390/agronomy13051306 - 6 May 2023
Cited by 3 | Viewed by 1344
Abstract
Rice cultivars with floury endosperm provide a useful raw material for producing dry-milled rice flour, helping to enhance the processed rice food industry. To expand the genetic resources for breeding floury endosperm rice cultivars, we developed Samkwang(SA)-flo3 (SK-flo3), a floury endosperm mutant line [...] Read more.
Rice cultivars with floury endosperm provide a useful raw material for producing dry-milled rice flour, helping to enhance the processed rice food industry. To expand the genetic resources for breeding floury endosperm rice cultivars, we developed Samkwang(SA)-flo3 (SK-flo3), a floury endosperm mutant line derived from the chemical mutagenesis of Samkwang, an elite Korean japonica rice cultivar. Compared with Samkwang, SK-flo3 showed significantly lower grain hardness, which is suitable for producing dry-milled flour without the soaking and drying processes required in regular wet rice milling. The dry-milled flour of SK-flo3 exhibited excellent physicochemical properties with less damaged starch and finer flour particles relative to Samkwang. Genetic analyses revealed a G-to-A point mutation in exon 7 of cyOsPPDKB, substituting glycine with aspartic acid as a causative mutation for the floury endosperm of SK-flo3. We named this allele flo4-6 and developed a molecular marker to efficiently transfer it to commercial rice cultivars. Our results provide useful genetic resources and information for developing specialty rice cultivars for high-quality rice flour production with reduced milling costs. Full article
(This article belongs to the Special Issue Rice and Wheat Breeding: Conventional and Novel Approaches)
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8 pages, 3673 KiB  
Communication
RicePedigree: Rice Pedigree Database for Documentation and Assistance in Rice Breeding
by Dong-U Woo, Yejin Lee, Ho-Hwi Jeon, Halim Park, Jin-Hwa Park, Sung-Hoon Choi, Chang-Min Lee, Youngjun Mo and Yang-Jae Kang
Agronomy 2023, 13(1), 69; https://doi.org/10.3390/agronomy13010069 - 25 Dec 2022
Viewed by 1906
Abstract
For the purpose of breeding documentation, researchers and breeders kept handwritten records of the breeding history, including parental information and breeding methods. The cultivars were used again as parents for further breeding, and modern cultivars of rice have a wide range of alleles [...] Read more.
For the purpose of breeding documentation, researchers and breeders kept handwritten records of the breeding history, including parental information and breeding methods. The cultivars were used again as parents for further breeding, and modern cultivars of rice have a wide range of alleles from many generations of parents and ancestors. To understand such a breeding history, it is necessary to ask around for relevant information, which is then usually documented in Excel or Word by multiple breeders or breeding institutes. Here, we constructed RicePedigree, which contains the breeding history of rice based on the documents provided by the Rural Development Administration (RDA) in Korea. We devised a simple method for collecting a breeding history and storing it in a database. RicePedigree is a web-based application on the database that facilitates researchers’ and breeders’ utilization of the breeding history of rice. Based on the query cultivar name, it will return a hierarchical tree of breeding histories and a list of cultivars and breeding lines that contain query cultivars in their breeding histories. This app would be a good way to review and keep track of information about current and future cultivars. Full article
(This article belongs to the Special Issue Rice and Wheat Breeding: Conventional and Novel Approaches)
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