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Rice Genetics and Breeding 2023
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Rice Genetics and Breeding 2023

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Genetics, Genomics and Biotechnology".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 1426

Special Issue Editors

Prof. Dr. Kyung–Min Kim

E-Mail Website
Guest Editor
School of Applied BioSciences, College of Agriculture & Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
Interests: rice breeder
Special Issues, Collections and Topics in MDPI journals
Dr. Gang-Seob Lee

E-Mail Website
Guest Editor
Biosafety Division, National Academy of Agricultural Science, Rural Development Administration, Jeonju 54874, Republic of Korea
Interests: QTL analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

To scientists around the world who study rice, breeding continues to increase productivity despite global climate change and labor shortages in agriculture, enriching our energy and lives in the process. Therefore, we would like to communicate the core science and technology of rice breeding in relation to rice genes in this Special Issue. It is our hope that we can go one step further and contribute to increasing food production on the planet.

Prof. Dr. Kyung–Min Kim
Dr. Gang-Seob 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. Plants is an international peer-reviewed open access semimonthly 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 2700 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

  • traditional breeding
  • backcross breeding
  • QTL
  • transformation
  • anther culture
  • genome editing

Published Papers (1 paper)

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Research

18 pages, 10892 KiB  
Article
A Frameshift Mutation in the Mg-Chelatase I Subunit Gene OsCHLI Is Associated with a Lethal Chlorophyll-Deficient, Yellow Seedling Phenotype in Rice
by Kyu-Chan Shim, Yuna Kang, Jun-Ho Song, Ye Jin Kim, Jae Kwang Kim, Changsoo Kim, Thomas H. Tai, Inkyu Park and Sang-Nag Ahn
Plants 2023, 12(15), 2831; https://doi.org/10.3390/plants12152831 - 31 Jul 2023
Cited by 2 | Viewed by 1161
Abstract
Chlorophyll biosynthesis is a crucial biological process in plants, and chlorophyll content is one of the most important traits in rice breeding programs. In this study, we identified a lethal, chlorophyll-deficient, yellow seedling (YS) phenotype segregating in progeny of CR5055-21, an F2 [...] Read more.
Chlorophyll biosynthesis is a crucial biological process in plants, and chlorophyll content is one of the most important traits in rice breeding programs. In this study, we identified a lethal, chlorophyll-deficient, yellow seedling (YS) phenotype segregating in progeny of CR5055-21, an F2 plant derived from a backcross between Korean japonica variety ‘Hwaseong’ (Oryza sativa) and CR5029, which is mostly Hwaseong with a small amount of Oryza grandiglumis chromosome segments. The segregation of the mutant phenotype was consistent with a single gene recessive mutation. Light microscopy of YS leaf cross-sections revealed loosely arranged mesophyll cells and sparse parenchyma in contrast to wildtype. In addition, transmission electron microscopy showed that chloroplasts did not develop in the mesophyll cells of the YS mutant. Quantitative trait loci (QTL)-seq analysis did not detect any significant QTL, however, examination of the individual delta-SNP index identified a 2-bp deletion (AG) in the OsCHLI gene, a magnesium (Mg)-chelatase subunit. A dCAPs marker was designed and genotyping of a segregating population (n = 275) showed that the mutant phenotype co-segregated with the marker. The 2-bp deletion was predicted to result in a frameshift mutation generating a premature termination. The truncated protein likely affects formation and function of Mg-chelatase, which consists of three different subunits that together catalyze the first committed step of chlorophyll biosynthesis. Transcriptome analysis showed that photosynthesis and carbohydrate metabolism pathways were significantly altered although expression of OsCHLI was not. Chlorophyll- and carotenoid-related genes were also differentially expressed in the YS mutant. Our findings demonstrated that OsCHLI plays an important role in leaf pigment biosynthesis and leaf structure development in rice. Full article
(This article belongs to the Special Issue Rice Genetics and Breeding 2023)
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