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Agronomy
Special Issues
Breakthroughs and Prospects of Rice Breeding
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Breakthroughs and Prospects of Rice Breeding

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Crop Breeding and Genetics".

Deadline for manuscript submissions: closed (15 September 2022) | Viewed by 11570

Special Issue Editors

Prof. Dr. Zefeng Yang

E-Mail Website
Guest Editor
College of Agricultural Science, Yangzhou University, Yangzhou, Jiangsu 225009, China
Interests: rice genetics; gene mapping and functional detection; evolutionary genomics; development of breeding methods; origin of new genes; horizontal gene transfer; de novo gene origin; population genomics
Dr. Yang Xu

E-Mail Website
Guest Editor
College of Agricultural Science, Yangzhou University, Yangzhou, Jiangsu 225009, China
Interests: genomic selection; genome-wide association studies; rice gene mapping; population genomics; plant statistical genomics

Special Issue Information

Dear Colleagues,

Rice (Oryza sativa) provides a staple food source for more than half the world population. Although modern genome technology, biotechnology, and information technology have greatly promoted the development of rice breeding, the current pace of rice breeding is insufficient to meet the food demand of the ever-increasing global population and the changing environments. The in-depth development and application of many omics technologies, including genomics, transcriptomics, metabonomics, proteomics, etc., have significantly promoted genetic analyses and functional gene mining of elite rice germplasm resources. Many genes/QTLs for yield, quality, resistance, and other important traits have been identified. However, there are many factors that restrict the breakthrough progress in rice breeding, including that the depth and breadth of elite germplasm resource mining is not enough, the development of new excellent allele variations through gene editing needs further strengthening, and the development of molecular design breeding methods such as genomic selection needs to be further developed.

This Special Issue will focus on “Breakthroughs and Prospects of Rice Breeding”. We seek original research articles and reviews covering all related topics, including detection of genes/QTLs with important breeding value, creation of new genetic variation through gene editing, development of breeding methods, and the successful practice of rice breeding.

Prof. Dr. Zefeng Yang
Dr. Yang Xu
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

  • rice
  • gene/QTL mapping
  • association analysis
  • genomic selection
  • molecular breeding by design
  • gene editing
  • CRISPR
  • functional detection
  • yield
  • quality
  • multiple resistance

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Published Papers (3 papers)

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Research

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13 pages, 2423 KiB  
Article
Hybrid Vigour and Hybrid Mimics in Japonica Rice
by You Zhang, Ben Ovenden, Yao He, Wenwei Ye, Xianjun Wu, William James Peacock and Elizabeth S. Dennis
Agronomy 2022, 12(7), 1559; https://doi.org/10.3390/agronomy12071559 - 29 Jun 2022
Cited by 3 | Viewed by 2418
Abstract
In crop improvement programs, hybrid vigour (heterosis) is an important breeding strategy but the molecular mechanisms of hybrid vigour are still unclear. Grain yield declines after F1 generation due to phenotypic segregation. We found that, at the early seedling stage in hybrids derived [...] Read more.
In crop improvement programs, hybrid vigour (heterosis) is an important breeding strategy but the molecular mechanisms of hybrid vigour are still unclear. Grain yield declines after F1 generation due to phenotypic segregation. We found that, at the early seedling stage in hybrids derived from the temperate japonica rice varieties ‘Doongara’ and ‘Reiziq’, hybrid vigour was approximately 40% greater than in the better parents. Inbred high-yielding lines (Hybrid Mimics) were developed from the ‘Doongara’ × ‘Reiziq’ F1 by selfing and recurrent selection for F1-like plants in the F2 through to the F5 generation. Grain yields are stable over subsequent generations in the Hybrid Mimic lines. The importance of photosynthesis in early seedling development was demonstrated. Photosynthesis-related genes were expressed in the hybrid earlier than in the parents; physiological evidence using gas exchange indicated the early commencement of photosynthesis. Dark germination experiments supported the requirement for photosynthesis for early vigour in hybrids. Full article
(This article belongs to the Special Issue Breakthroughs and Prospects of Rice Breeding)
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11 pages, 2723 KiB  
Article
Impacts of Protein from High-Protein Rice on Gelatinization and Retrogradation Properties in High- and Low-Amylose Reconstituted Rice Flour
by Yitong Zhao, Xianggui Dai, Enerand Mackon, Yafei Ma and Piqing Liu
Agronomy 2022, 12(6), 1431; https://doi.org/10.3390/agronomy12061431 - 15 Jun 2022
Cited by 10 | Viewed by 3177
Abstract
High-protein rice is nutritional, but its taste attributes are inferior to low-protein rice. Many documents correlate its taste attributes with its gelatinization and retrogradation properties. This study investigated the changes in gelatinization and retrogradation properties of low- and high-amylose reconstituted rice flour (RRF) [...] Read more.
High-protein rice is nutritional, but its taste attributes are inferior to low-protein rice. Many documents correlate its taste attributes with its gelatinization and retrogradation properties. This study investigated the changes in gelatinization and retrogradation properties of low- and high-amylose reconstituted rice flour (RRF) added with different fractions of proteins extracted from high-protein rice. The addition of protein decreased the RVA (rapid viscosity analyzer) viscosity parameters of the RRF but increased the peak time. The high amylose fractions in the RRF mainly increased the parameters PV, FV, SB, and peak times, and scarcely affected the parameters BD and PaT. The interaction between amylose and protein determined the pasting temperature. Protein addition in RRF significantly decreased gelatinization enthalpies but increased the onset temperature (To) and peak temperature (Tp), while the amylose in RRF increased the gelatinization enthalpies, To and Tp. Protein additions decreased the gel hardness and the pore size, while the amylose increased the gel hardness but decreased pore size. Our findings may be potentially useful in breeding and cultivating high-protein rice. Full article
(This article belongs to the Special Issue Breakthroughs and Prospects of Rice Breeding)
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Review

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15 pages, 4978 KiB  
Review
Novel Sequencing and Genomic Technologies Revolutionized Rice Genomic Study and Breeding
by Haiyong Gu, Shihu Liang and Junliang Zhao
Agronomy 2022, 12(1), 218; https://doi.org/10.3390/agronomy12010218 - 16 Jan 2022
Cited by 7 | Viewed by 4850
Abstract
Rice is one of the most important food crops worldwide. Population growth and climate change posed great challenges for further rice production. In the past decade, we have witnessed an explosive development in novel sequencing and genomic technologies. These technologies have been widely [...] Read more.
Rice is one of the most important food crops worldwide. Population growth and climate change posed great challenges for further rice production. In the past decade, we have witnessed an explosive development in novel sequencing and genomic technologies. These technologies have been widely applied in rice genomic study and improvement processes, and contributed greatly to increase the efficiency and accuracy of rice breeding. On the other hand, novel sequencing and genomic technologies also promote the shift of breeding schemes from conventional field selection processes to genomic assisted breeding. These technologies have revolutionized almost every aspect of rice study and breeding. Here, we systematically sorted out and reviewed the progress and advancements of sequencing and genomic technologies. We further discussed how these technologies were incorporated into rice breeding practices and helped accelerate the rice improvement process. Finally, we reflected on how to further utilize novel sequencing and genomic technologies in rice genetic improvement, as well as the future trends of advancement for these technologies. It can be expected that, as the sequencing and genomic technologies will develop much more quickly in the future, and be combined with novel bioinformatics tools, rice breeding will move forward into the genomic assisted era. Full article
(This article belongs to the Special Issue Breakthroughs and Prospects of Rice Breeding)
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