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Arakawa T, Uchiyama D, Ohgami T, Ohgami R, Murata T, Honma Y, Hamada H, Kuroda Y, Taguchi K, Kitazaki K, Kubo T. A fertility-restoring genotype of beet (Beta vulgaris L.) is composed of a weak restorer-of-fertility gene and a modifier gene tightly linked to the Rf1 locus. PLoS One 2018; 13:e0198409. [PMID: 29856854 PMCID: PMC5983528 DOI: 10.1371/journal.pone.0198409] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 05/19/2018] [Indexed: 11/23/2022] Open
Abstract
Cytoplasmic male sterility (CMS) is a plant trait that involves interactions between nuclear- and mitochondrial genomes. In CMS, the nuclear restorer-of-fertility gene (Rf), a suppressor of male-sterility inducing mitochondria, is one of the best known genetic factors. Other unidentified genetic factors may exist but have not been well characterized. In sugar beet (Beta vulgaris L.), CMS is used for hybrid seed production, but few male-sterility inducing nuclear genotypes exist. Such genotypes could be introduced from a closely related plant such as leaf beet, but first the fertility restoring genotype of the related plant must be characterized. Here, we report the discovery of a Japanese leaf beet accession ‘Fukkoku-ouba’ that has both male-sterility inducing and fertility restoring genotypes. We crossed the leaf beet accession with a sugar beet CMS line, developed succeeding generations, and examined the segregation of two DNA markers that are linked to two sugar beet Rfs, Rf1 and Rf2. Only the Rf2 marker co-segregated with fertility restoration in every generation, implying that the Rf1 locus in leaf beet is occupied by a non-restoring allele. Fertility restoration was incomplete without a genetic factor closely linked to Rf1, leading to the assumption that the Rf1 locus encodes a modifier that cannot restore fertility by itself but perhaps strengthens another Rf. We sequenced the apparently non-restoring ‘Fukkoku-ouba’ rf1 gene-coding region and found that it closely resembles a restoring allele. The protein product demonstrated its potential to suppress CMS in transgenic suspension cells. In contrast, ‘Fukkoku-ouba’ rf1 transcript abundance was highly reduced compared to that of the restoring Rf1. Consistently, changes in protein complexes containing CMS-associated mitochondrial protein in anthers were very minor. Accordingly, we concluded that ‘Fukkoku-ouba’ rf1 is a hypomorph that acts as a non-restoring allele but has the potential to support another Rf, i.e. it is a modifier candidate.
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Affiliation(s)
- Takumi Arakawa
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Daisuke Uchiyama
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Takashi Ohgami
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Ryo Ohgami
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Tomoki Murata
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Yujiro Honma
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Hiroyuki Hamada
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Yosuke Kuroda
- Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Memuro, Japan
| | - Kazunori Taguchi
- Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Memuro, Japan
| | | | - Tomohiko Kubo
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
- * E-mail:
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Ohgami T, Uchiyama D, Ue S, Yui-Kurino R, Yoshida Y, Kamei Y, Kuroda Y, Taguchi K, Kubo T. Erratum to: Identification of molecular variants of the nonrestoring restorer-of-fertility 1 allele in sugar beet (Beta vulgaris L.). Theor Appl Genet 2017; 130:1333. [PMID: 28434025 DOI: 10.1007/s00122-017-2907-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Takashi Ohgami
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Daisuke Uchiyama
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Sachiyo Ue
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Rika Yui-Kurino
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Yu Yoshida
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Yoko Kamei
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Yosuke Kuroda
- Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Memuro, 082-0081, Japan
| | - Kazunori Taguchi
- Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Memuro, 082-0081, Japan
| | - Tomohiko Kubo
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan.
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Ohgami T, Uchiyama D, Ue S, Yui-Kurino R, Yoshida Y, Kamei Y, Kuroda Y, Taguchi K, Kubo T. Identification of molecular variants of the nonrestoring restorer-of-fertility 1 allele in sugar beet (Beta vulgaris L.). Theor Appl Genet 2016; 129:675-688. [PMID: 26714697 DOI: 10.1007/s00122-015-2656-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 12/11/2015] [Indexed: 05/05/2023]
Abstract
Only three variants of nonrestoring alleles for sugar beet Rf1 were found from the US maintainer lines which were the selections from a broad range of genetic resources. Cytoplasmic male sterility is widely used for hybrid breeding of sugar beets. Specific genotypes with a nonsterility-inducing cytoplasm and a nonrestoring allele of restorer-of-fertility gene (rf) are called maintainers. The infrequent occurrence of the maintainer genotype evokes the need to diagnose rf alleles. Molecular analysis of Rf1, one of the sugar beet Rfs, revealed a high level of nucleotide sequence diversity, but three variants were tightly associated with maintainer selection in Japan. The question was raised whether this small number of variants would be seen in cases where a wider range of genetic resources was used for maintainer selection. Fifty-seven accessions registered as maintainers in the USDA germplasm collection were characterized in this study. Mitochondrial DNA types (mitotypes) of 551 plants were diagnosed based on minisatellite polymorphism. A mitotype associated with sterility-inducing (S) cytoplasm was identified in 58 plants, indicating S-cytoplasm contamination. The organization of rf1 was investigated by two PCR markers and DNA gel blot analysis. Eight haplotypes were found among the US maintainers, but subsequently two haplotypes were judged as restoring alleles after a test cross and another haplotype was not inherited by the progeny. Nucleotide sequences of rf1 regions in the remaining five haplotypes were compared, and despite the sequence diversity of the gene-flanking regions, the gene-coding regions were identified to be three types. Therefore, there are three rf1 variants in US maintainers, the same number as in the Japanese sugar beet germplasm collection. The implications of having a small repertoire of rf1 variants are discussed.
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Affiliation(s)
- Takashi Ohgami
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Daisuke Uchiyama
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Sachiyo Ue
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Rika Yui-Kurino
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Yu Yoshida
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Yoko Kamei
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan
| | - Yosuke Kuroda
- Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Memuro, 082-0081, Japan
| | - Kazunori Taguchi
- Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Memuro, 082-0081, Japan
| | - Tomohiko Kubo
- Research Faculty of Agriculture, Hokkaido University, N-9, W-9, Kita-Ku, Sapporo, 060-8589, Japan.
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Seo Y, Uchiyama D, Kuroki K, Kishida T. STR and mitochondrial DNA SNP typing of a bone marrow transplant recipient after death in a fire. Leg Med (Tokyo) 2012; 14:331-5. [DOI: 10.1016/j.legalmed.2012.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 06/05/2012] [Accepted: 06/05/2012] [Indexed: 11/30/2022]
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Uchiyama D, Oikawa H, Otomo K, Nango M, Dewa T, Fujiyoshi S, Matsushita M. Reconstitution of bacterial photosynthetic unit in a lipid bilayer studied by single-molecule spectroscopy at 5 K. Phys Chem Chem Phys 2011; 13:11615-9. [PMID: 21597611 DOI: 10.1039/c1cp20172g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As a model of photosynthetic unit (PSU), self-assembled aggregates of pigment-protein complexes from photosynthetic bacteria were prepared in a lipid bilayer by reconstitution of the light-harvesting 2 (LH2) complex and light-harvesting 1-reaction center (LH1-RC) complex through detergent removal of their micelles in the presence of lipids. By performing polarization-controlled fluorescence and fluorescence-excitation spectroscopy on single aggregates at a temperature of 5 K, the composition of individual aggregates was determined and excitation energy transfer (EET) between constituent complexes was observed. LH2 and LH1-RC from a bacterium, Rhodobacter (Rb.) sphaeroides, were found to form a trimeric aggregate in which EET takes place from one LH2 to two LH1-RCs. In contrast, a heterodimer of LH2 and LH1-RC in which EET works was found to assemble from a combination of complexes of different bacterial species, that is, LH2 from Rb. sphaeroides and LH1-RC from Rhodopseudomonas (Rps.) palustris.
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Affiliation(s)
- Daisuke Uchiyama
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
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