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Cseh A, Lenykó-Thegze A, Makai D, Szabados F, Hamow KÁ, Gulyás Z, Kiss T, Karsai I, Moncsek B, Mihók E, Sepsi A. Meiotic instability and irregular chromosome pairing underpin heat-induced infertility in bread wheat carrying the Rht-B1b or Rht-D1b Green Revolution genes. THE NEW PHYTOLOGIST 2024; 241:180-196. [PMID: 37691304 DOI: 10.1111/nph.19256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 08/12/2023] [Indexed: 09/12/2023]
Abstract
Mutations in the Rht-B1a and Rht-D1a genes of wheat (Triticum aestivum; resulting in Rht-B1b and Rht-D1b alleles) cause gibberellin-insensitive dwarfism and are one of the most important elements of increased yield introduced during the 'Green Revolution'. We measured the effects of a short period of heat imposed during the early reproductive stage on near-isogenic lines carrying Rht-B1b or Rht-D1b alleles, with respect to the wild-type (WT). The temperature shift caused a significant fertility loss within the ears of Rht-B1b and Rht-D1b wheats, greater than that observed for the WT. Defects in chromosome synapsis, reduced homologous recombination and a high frequency of chromosome mis-segregation were associated with reduced fertility. The transcription of TaGA3ox gene involved in the final stage of gibberellic acid (GA) biosynthesis was activated and ultra-performance liquid chromatography-tandem mass spectrometry identified GA1 as the dominant bioactive GA in developing ears, but levels were unaffected by the elevated temperature. Rht-B1b and Rht-D1b mutants were inclined to meiotic errors under optimal temperatures and showed a higher susceptibility to heat than their tall counterparts. Identification and introduction of new dwarfing alleles into modern breeding programmes is invaluable in the development of climate-resilient wheat varieties.
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Affiliation(s)
- András Cseh
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Andrea Lenykó-Thegze
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
- Doctoral School of Biology, Institute of Biology, ELTE Eötvös Loránd University, Egyetem tér 1-3, Budapest, 1053, Hungary
| | - Diána Makai
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Fanni Szabados
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Kamirán Áron Hamow
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Zsolt Gulyás
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Tibor Kiss
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
- Food and Wine Research Institute, Eszterházy Károly Catholic University, Eszterházy tér 1, Eger, 3300, Hungary
| | - Ildikó Karsai
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Blanka Moncsek
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Edit Mihók
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
| | - Adél Sepsi
- HUN-REN, Centre for Agricultural Research, 2462, Martonvásár, Brunszvik u. 2, Hungary
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Rong Y, Zhang X, Chen X, Li J, Gong P, Wang X, Li X, Zhang X, Yue T, Zhang H, Zhou X, Zhang N. Development of an LFD-RPA Assay for Rapid Detection of Pentatrichomonas hominis Infection in Dogs. Curr Issues Mol Biol 2023; 45:9252-9261. [PMID: 37998756 PMCID: PMC10670101 DOI: 10.3390/cimb45110579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/10/2023] [Accepted: 11/13/2023] [Indexed: 11/25/2023] Open
Abstract
Pentatrichomonas hominis is a trichomonad protozoan that infects the cecum and colon of humans and other mammals. It is a zoonotic pathogen that causes diarrhea in both animals and humans. As companion animals, dogs infected with P. hominis pose a risk of transmitting it to humans. Current methods, such as direct smears and polymerase chain reaction (PCR), used for P. hominis detection have limitations, including low detection rates and the need for specialized equipment. Therefore, there is an urgent need to develop rapid, sensitive, and simple detection methods for clinical application. Recombinase polymerase amplification (RPA) has emerged as a technology for rapid pathogen detection. In this study, we developed a lateral flow dipstick (LFD)-RPA method based on the highly conserved SPO11-1 gene for detecting P. hominis infection by optimizing the primers, probes, and reaction conditions, and evaluating cross-reactivity with genomes of Giardia duodenalis and other parasites. The LFD-RPA method was then used to test 128 dog fecal samples collected from Changchun. The results confirmed the high specificity of the method with no cross-reactivity with the five other parasites. The lowest detection limit of the method was 102 copies/µL, and its sensitivity was 100 times higher than that of the conventional PCR method. Consistent with the positivity rate observed using nested PCR, 12 samples (out of 128) tested positive using this method (positivity rate, 9.38%). In conclusion, the LFD-RPA method developed in this study represents a simple and sensitive assay that allows for the rapid detection of P. hominis infection in dogs, especially in this field.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Nan Zhang
- Key Laboratory of Zoonosis Research of Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, China; (Y.R.); (X.Z.); (X.C.); (J.L.); (P.G.); (X.W.); (X.L.); (X.Z.); (T.Y.); (H.Z.); (X.Z.)
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3
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Di Dio C, Serra H, Sourdille P, Higgins JD. ASYNAPSIS 1 ensures crossover fidelity in polyploid wheat by promoting homologous recombination and suppressing non-homologous recombination. FRONTIERS IN PLANT SCIENCE 2023; 14:1188347. [PMID: 37284727 PMCID: PMC10239940 DOI: 10.3389/fpls.2023.1188347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 04/17/2023] [Indexed: 06/08/2023]
Abstract
During meiosis, the chromosome axes and synaptonemal complex mediate chromosome pairing and homologous recombination to maintain genomic stability and accurate chromosome segregation. In plants, ASYNAPSIS 1 (ASY1) is a key component of the chromosome axis that promotes inter-homolog recombination, synapsis and crossover formation. Here, the function of ASY1 has been cytologically characterized in a series of hypomorphic wheat mutants. In tetraploid wheat, asy1 hypomorphic mutants experience a reduction in chiasmata (crossovers) in a dosage-specific manner, resulting in failure to maintain crossover (CO) assurance. In mutants with only one functional copy of ASY1, distal chiasmata are maintained at the expense of proximal and interstitial chiasmata, indicating that ASY1 is required to promote chiasma formation away from the chromosome ends. Meiotic prophase I progression is delayed in asy1 hypomorphic mutants and is arrested in asy1 null mutants. In both tetraploid and hexaploid wheat, single asy1 mutants exhibit a high degree of ectopic recombination between multiple chromosomes at metaphase I. To explore the nature of the ectopic recombination, Triticum turgidum asy1b-2 was crossed with wheat-wild relative Aegilops variabilis. Homoeologous chiasmata increased 3.75-fold in Ttasy1b-2/Ae. variabilis compared to wild type/Ae. variabilis, indicating that ASY1 suppresses chiasma formation between divergent, but related chromosomes. These data suggest that ASY1 promotes recombination along the chromosome arms of homologous chromosomes whilst suppressing recombination between non-homologous chromosomes. Therefore, asy1 mutants could be utilized to increase recombination between wheat wild relatives and elite varieties for expediting introgression of important agronomic traits.
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Affiliation(s)
- Chiara Di Dio
- Department of Genetics and Genome Biology, Adrian Building, University of Leicester, Leicester, United Kingdom
| | - Heïdi Serra
- Genetics, Diversity and Ecophysiology of Cereals, Unité Mixte de Recherche (UMR) 1095, The Institut National de la Recherche Agronomique (INRAE), Université Clermont Auvergne, Clermont-Ferrand, France
| | - Pierre Sourdille
- Genetics, Diversity and Ecophysiology of Cereals, Unité Mixte de Recherche (UMR) 1095, The Institut National de la Recherche Agronomique (INRAE), Université Clermont Auvergne, Clermont-Ferrand, France
| | - James D. Higgins
- Department of Genetics and Genome Biology, Adrian Building, University of Leicester, Leicester, United Kingdom
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Rafiei N, Ronceret A. Crossover interference mechanism: New lessons from plants. Front Cell Dev Biol 2023; 11:1156766. [PMID: 37274744 PMCID: PMC10236007 DOI: 10.3389/fcell.2023.1156766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 04/17/2023] [Indexed: 06/06/2023] Open
Abstract
Plants are the source of our understanding of several fundamental biological principles. It is well known that Gregor Mendel discovered the laws of Genetics in peas and that maize was used for the discovery of transposons by Barbara McClintock. Plant models are still useful for the understanding of general key biological concepts. In this article, we will focus on discussing the recent plant studies that have shed new light on the mysterious mechanisms of meiotic crossover (CO) interference, heterochiasmy, obligatory CO, and CO homeostasis. Obligatory CO is necessary for the equilibrated segregation of homologous chromosomes during meiosis. The tight control of the different male and female CO rates (heterochiasmy) enables both the maximization and minimization of genome shuffling. An integrative model can now predict these observed aspects of CO patterning in plants. The mechanism proposed considers the Synaptonemal Complex as a canalizing structure that allows the diffusion of a class I CO limiting factor linearly on synapsed bivalents. The coarsening of this limiting factor along the SC explains the interfering spacing between COs. The model explains the observed coordinated processes between synapsis, CO interference, CO insurance, and CO homeostasis. It also easily explains heterochiasmy just considering the different male and female SC lengths. This mechanism is expected to be conserved in other species.
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Steckenborn S, Cuacos M, Ayoub MA, Feng C, Schubert V, Hoffie I, Hensel G, Kumlehn J, Heckmann S. The meiotic topoisomerase VI B subunit (MTOPVIB) is essential for meiotic DNA double-strand break formation in barley (Hordeum vulgare L.). PLANT REPRODUCTION 2023; 36:1-15. [PMID: 35767067 PMCID: PMC9957907 DOI: 10.1007/s00497-022-00444-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/31/2022] [Indexed: 06/01/2023]
Abstract
In barley (Hordeum vulgare), MTOPVIB is critical for meiotic DSB and accompanied SC and CO formation while dispensable for meiotic bipolar spindle formation. Homologous recombination during meiosis assures genetic variation in offspring. Programmed meiotic DNA double-strand breaks (DSBs) are repaired as crossover (CO) or non-crossover (NCO) during meiotic recombination. The meiotic topoisomerase VI (TopoVI) B subunit (MTOPVIB) plays an essential role in meiotic DSB formation critical for CO-recombination. More recently MTOPVIB has been also shown to play a role in meiotic bipolar spindle formation in rice and maize. Here, we describe a meiotic DSB-defective mutant in barley (Hordeum vulgare L.). CRISPR-associated 9 (Cas9) endonuclease-generated mtopVIB plants show complete sterility due to the absence of meiotic DSB, synaptonemal complex (SC), and CO formation leading to the occurrence of univalents and their unbalanced segregation into aneuploid gametes. In HvmtopVIB plants, we also frequently found the bi-orientation of sister kinetochores in univalents during metaphase I and the precocious separation of sister chromatids during anaphase I. Moreover, the near absence of polyads after meiosis II, suggests that despite being critical for meiotic DSB formation in barley, MTOPVIB seems not to be strictly required for meiotic bipolar spindle formation.
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Affiliation(s)
- Stefan Steckenborn
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Maria Cuacos
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Mohammad A Ayoub
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Chao Feng
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Veit Schubert
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Iris Hoffie
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Götz Hensel
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Jochen Kumlehn
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany
| | - Stefan Heckmann
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) OT Gatersleben, Corrensstrasse 3, 06466, Seeland, Germany.
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Hyde L, Osman K, Winfield M, Sanchez‐Moran E, Higgins JD, Henderson IR, Sparks C, Franklin FCH, Edwards KJ. Identification, characterization, and rescue of CRISPR/Cas9 generated wheat SPO11-1 mutants. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:405-418. [PMID: 36373224 PMCID: PMC9884015 DOI: 10.1111/pbi.13961] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 10/31/2022] [Accepted: 11/07/2022] [Indexed: 05/29/2023]
Abstract
Increasing crop yields through plant breeding is time consuming and laborious, with the generation of novel combinations of alleles being limited by chromosomal linkage blocks and linkage-drag. Meiotic recombination is essential to create novel genetic variation via the reshuffling of parental alleles. The exchange of genetic information between homologous chromosomes occurs at crossover (CO) sites but CO frequency is often low and unevenly distributed. This bias creates the problem of linkage-drag in recombination 'cold' regions, where undesirable variation remains linked to useful traits. In plants, programmed meiosis-specific DNA double-strand breaks, catalysed by the SPO11 complex, initiate the recombination pathway, although only ~5% result in the formation of COs. To study the role of SPO11-1 in wheat meiosis, and as a prelude to manipulation, we used CRISPR/Cas9 to generate edits in all three SPO11-1 homoeologues of hexaploid wheat. Characterization of progeny lines shows plants deficient in all six SPO11-1 copies fail to undergo chromosome synapsis, lack COs and are sterile. In contrast, lines carrying a single copy of any one of the three wild-type homoeologues are phenotypically indistinguishable from unedited plants both in terms of vegetative growth and fertility. However, cytogenetic analysis of the edited plants suggests that homoeologues differ in their ability to generate COs and in the dynamics of synapsis. In addition, we show that the transformation of wheat mutants carrying six edited copies of SPO11-1 with the TaSPO11-1B gene, restores synapsis, CO formation, and fertility and hence opens a route to modifying recombination in this agronomically important crop.
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Affiliation(s)
- Lucy Hyde
- School of Biological Sciences, Life SciencesUniversity of BristolBristolUK
| | - Kim Osman
- School of BiosciencesUniversity of BirminghamBirminghamUK
| | - Mark Winfield
- School of Biological Sciences, Life SciencesUniversity of BristolBristolUK
| | | | - James D. Higgins
- Department of Genetics and Genome BiologyUniversity of LeicesterLeicesterUK
| | | | | | | | - Keith J. Edwards
- School of Biological Sciences, Life SciencesUniversity of BristolBristolUK
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7
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Fu H, Zhao J, Ren Z, Yang K, Wang C, Zhang X, Elesawi IE, Zhang X, Xia J, Chen C, Lu P, Chen Y, Liu H, Yu G, Liu B. Interfered chromosome pairing at high temperature promotes meiotic instability in autotetraploid Arabidopsis. PLANT PHYSIOLOGY 2022; 188:1210-1228. [PMID: 34927688 PMCID: PMC8825311 DOI: 10.1093/plphys/kiab563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/04/2021] [Indexed: 05/03/2023]
Abstract
Changes in environmental temperature affect multiple meiotic processes in flowering plants. Polyploid plants derived from whole-genome duplication (WGD) have enhanced genetic plasticity and tolerance to environmental stress but face challenges in organizing and segregating doubled chromosome sets. In this study, we investigated the impact of increased environmental temperature on male meiosis in autotetraploid Arabidopsis (Arabidopsis thaliana). Under low to mildly increased temperatures (5°C-28°C), irregular chromosome segregation universally occurred in synthetic autotetraploid Columbia-0 (Col-0). Similar meiotic lesions occurred in autotetraploid rice (Oryza sativa L.) and allotetraploid canola (Brassica napus cv Westar), but not in evolutionarily derived hexaploid wheat (Triticum aestivum). At extremely high temperatures, chromosome separation and tetrad formation became severely disordered due to univalent formation caused by the suppression of crossing-over. We found a strong correlation between tetravalent formation and successful chromosome pairing, both of which were negatively correlated with temperature elevation, suggesting that increased temperature interferes with crossing-over predominantly by impacting homolog pairing. We also showed that loading irregularities of axis proteins ASY1 and ASY4 co-localize on the chromosomes of the syn1 mutant and the heat-stressed diploid and autotetraploid Col-0, revealing that heat stress affects the lateral region of synaptonemal complex (SC) by impacting the stability of the chromosome axis. Moreover, we showed that chromosome axis and SC in autotetraploid Col-0 are more sensitive to increased temperature than those in diploid Arabidopsis. Taken together, our data provide evidence suggesting that WGD negatively affects the stability and thermal tolerance of meiotic recombination in newly synthetic autotetraploid Arabidopsis.
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Affiliation(s)
- Huiqi Fu
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Jiayi Zhao
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Ziming Ren
- College of Agriculture and Biotechnology, Zhejiang University, Zhejiang 310058, China
| | - Ke Yang
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Chong Wang
- College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Xiaohong Zhang
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Ibrahim Eid Elesawi
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Agricultural Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Xianhua Zhang
- School of Life Sciences, Hubei University, Wuhan 430062, China
| | - Jing Xia
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Chunli Chen
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region, College of Life Science, Guizhou University, Guiyang 550025, China
| | - Ping Lu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yongxing Chen
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hong Liu
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Guanghui Yu
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Bing Liu
- College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, China
- Author for communication:
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8
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Vrielynck N, Schneider K, Rodriguez M, Sims J, Chambon A, Hurel A, De Muyt A, Ronceret A, Krsicka O, Mézard C, Schlögelhofer P, Grelon M. Conservation and divergence of meiotic DNA double strand break forming mechanisms in Arabidopsis thaliana. Nucleic Acids Res 2021; 49:9821-9835. [PMID: 34458909 PMCID: PMC8464057 DOI: 10.1093/nar/gkab715] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 07/16/2021] [Accepted: 08/04/2021] [Indexed: 11/13/2022] Open
Abstract
In the current meiotic recombination initiation model, the SPO11 catalytic subunits associate with MTOPVIB to form a Topoisomerase VI-like complex that generates DNA double strand breaks (DSBs). Four additional proteins, PRD1/AtMEI1, PRD2/AtMEI4, PRD3/AtMER2 and the plant specific DFO are required for meiotic DSB formation. Here we show that (i) MTOPVIB and PRD1 provide the link between the catalytic sub-complex and the other DSB proteins, (ii) PRD3/AtMER2, while localized to the axis, does not assemble a canonical pre-DSB complex but establishes a direct link between the DSB-forming and resection machineries, (iii) DFO controls MTOPVIB foci formation and is part of a divergent RMM-like complex including PHS1/AtREC114 and PRD2/AtMEI4 but not PRD3/AtMER2, (iv) PHS1/AtREC114 is absolutely unnecessary for DSB formation despite having a conserved position within the DSB protein network and (v) MTOPVIB and PRD2/AtMEI4 interact directly with chromosome axis proteins to anchor the meiotic DSB machinery to the axis.
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Affiliation(s)
- Nathalie Vrielynck
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Katja Schneider
- Department of Chromosome Biology, Max Perutz Labs, University of Vienna, Vienna Biocenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Marion Rodriguez
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Jason Sims
- Department of Chromosome Biology, Max Perutz Labs, University of Vienna, Vienna Biocenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Aurélie Chambon
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Aurélie Hurel
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Arnaud De Muyt
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Arnaud Ronceret
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Ondrej Krsicka
- Department of Chromosome Biology, Max Perutz Labs, University of Vienna, Vienna Biocenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Christine Mézard
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Peter Schlögelhofer
- Department of Chromosome Biology, Max Perutz Labs, University of Vienna, Vienna Biocenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Mathilde Grelon
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
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Gutiérrez Pinzón Y, González Kise JK, Rueda P, Ronceret A. The Formation of Bivalents and the Control of Plant Meiotic Recombination. FRONTIERS IN PLANT SCIENCE 2021; 12:717423. [PMID: 34557215 PMCID: PMC8453087 DOI: 10.3389/fpls.2021.717423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 08/13/2021] [Indexed: 06/06/2023]
Abstract
During the first meiotic division, the segregation of homologous chromosomes depends on the physical association of the recombined homologous DNA molecules. The physical tension due to the sites of crossing-overs (COs) is essential for the meiotic spindle to segregate the connected homologous chromosomes to the opposite poles of the cell. This equilibrated partition of homologous chromosomes allows the first meiotic reductional division. Thus, the segregation of homologous chromosomes is dependent on their recombination. In this review, we will detail the recent advances in the knowledge of the mechanisms of recombination and bivalent formation in plants. In plants, the absence of meiotic checkpoints allows observation of subsequent meiotic events in absence of meiotic recombination or defective meiotic chromosomal axis formation such as univalent formation instead of bivalents. Recent discoveries, mainly made in Arabidopsis, rice, and maize, have highlighted the link between the machinery of double-strand break (DSB) formation and elements of the chromosomal axis. We will also discuss the implications of what we know about the mechanisms regulating the number and spacing of COs (obligate CO, CO homeostasis, and interference) in model and crop plants.
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10
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Sprink T, Hartung F. Heterologous Complementation of SPO11-1 and -2 Depends on the Splicing Pattern. Int J Mol Sci 2021; 22:ijms22179346. [PMID: 34502253 PMCID: PMC8430568 DOI: 10.3390/ijms22179346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 11/16/2022] Open
Abstract
In the past, major findings in meiosis have been achieved, but questions towards the global understanding of meiosis remain concealed. In plants, one of these questions covers the need for two diverse meiotic active SPO11 proteins. In Arabidopsis and other plants, both meiotic SPO11 are indispensable in a functional form for double strand break induction during meiotic prophase I. This stands in contrast to mammals and fungi, where a single SPO11 is present and sufficient. We aimed to investigate the specific function and evolution of both meiotic SPO11 paralogs in land plants. By performing immunostaining of both SPO11-1 and -2, an investigation of the spatiotemporal localization of each SPO11 during meiosis was achieved. We further exchanged SPO11-1 and -2 in Arabidopsis and could show a species-specific function of the respective SPO11. By additional changes of regions between SPO11-1 and -2, a sequence-specific function for both the SPO11 proteins was revealed. Furthermore, the previous findings about the aberrant splicing of each SPO11 were refined by narrowing them down to a specific developmental phase. These findings let us suggest that the function of both SPO11 paralogs is highly sequence specific and that the orthologs are species specific.
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11
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Kuo P, Da Ines O, Lambing C. Rewiring Meiosis for Crop Improvement. FRONTIERS IN PLANT SCIENCE 2021; 12:708948. [PMID: 34349775 PMCID: PMC8328115 DOI: 10.3389/fpls.2021.708948] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/17/2021] [Indexed: 05/10/2023]
Abstract
Meiosis is a specialized cell division that contributes to halve the genome content and reshuffle allelic combinations between generations in sexually reproducing eukaryotes. During meiosis, a large number of programmed DNA double-strand breaks (DSBs) are formed throughout the genome. Repair of meiotic DSBs facilitates the pairing of homologs and forms crossovers which are the reciprocal exchange of genetic information between chromosomes. Meiotic recombination also influences centromere organization and is essential for proper chromosome segregation. Accordingly, meiotic recombination drives genome evolution and is a powerful tool for breeders to create new varieties important to food security. Modifying meiotic recombination has the potential to accelerate plant breeding but it can also have detrimental effects on plant performance by breaking beneficial genetic linkages. Therefore, it is essential to gain a better understanding of these processes in order to develop novel strategies to facilitate plant breeding. Recent progress in targeted recombination technologies, chromosome engineering, and an increasing knowledge in the control of meiotic chromosome segregation has significantly increased our ability to manipulate meiosis. In this review, we summarize the latest findings and technologies on meiosis in plants. We also highlight recent attempts and future directions to manipulate crossover events and control the meiotic division process in a breeding perspective.
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Affiliation(s)
- Pallas Kuo
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Olivier Da Ines
- Institut Génétique Reproduction et Développement (iGReD), Université Clermont Auvergne, UMR 6293 CNRS, U1103 INSERM, Clermont-Ferrand, France
| | - Christophe Lambing
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
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Osman K, Algopishi U, Higgins JD, Henderson IR, Edwards KJ, Franklin FCH, Sanchez-Moran E. Distal Bias of Meiotic Crossovers in Hexaploid Bread Wheat Reflects Spatio-Temporal Asymmetry of the Meiotic Program. FRONTIERS IN PLANT SCIENCE 2021; 12:631323. [PMID: 33679846 DOI: 10.33892/ffpls.2021.631323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/18/2021] [Indexed: 05/25/2023]
Abstract
Meiotic recombination generates genetic variation and provides physical links between homologous chromosomes (crossovers) essential for accurate segregation. In cereals the distribution of crossovers, cytologically evident as chiasmata, is biased toward the distal regions of chromosomes. This creates a bottleneck for plant breeders in the development of varieties with improved agronomic traits, as genes situated in the interstitial and centromere proximal regions of chromosomes rarely recombine. Recent advances in wheat genomics and genome engineering combined with well-developed wheat cytogenetics offer new opportunities to manipulate recombination and unlock genetic variation. As a basis for these investigations we have carried out a detailed analysis of meiotic progression in hexaploid wheat (Triticum aestivum) using immunolocalization of chromosome axis, synaptonemal complex and recombination proteins. 5-Bromo-2'-deoxyuridine (BrdU) labeling was used to determine the chronology of key events in relation to DNA replication. Axis morphogenesis, synapsis and recombination initiation were found to be spatio-temporally coordinated, beginning in the gene-dense distal chromosomal regions and later occurring in the interstitial/proximal regions. Moreover, meiotic progression in the distal regions was coordinated with the conserved chromatin cycles that are a feature of meiosis. This mirroring of the chiasma bias was also evident in the distribution of the gene-associated histone marks, H3K4me3 and H3K27me3; the repeat-associated mark, H3K27me1; and H3K9me3. We believe that this study provides a cytogenetic framework for functional studies and ongoing initiatives to manipulate recombination in the wheat genome.
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Affiliation(s)
- Kim Osman
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Uthman Algopishi
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - James D Higgins
- Department of Genetics and Genome Biology, University of Leicester, Leicester, United Kingdom
| | - Ian R Henderson
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Keith J Edwards
- School of Biological Sciences, University of Bristol, Bristol, United Kingdom
| | - F Chris H Franklin
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
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Osman K, Algopishi U, Higgins JD, Henderson IR, Edwards KJ, Franklin FCH, Sanchez-Moran E. Distal Bias of Meiotic Crossovers in Hexaploid Bread Wheat Reflects Spatio-Temporal Asymmetry of the Meiotic Program. FRONTIERS IN PLANT SCIENCE 2021; 12:631323. [PMID: 33679846 PMCID: PMC7928317 DOI: 10.3389/fpls.2021.631323] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/18/2021] [Indexed: 05/09/2023]
Abstract
Meiotic recombination generates genetic variation and provides physical links between homologous chromosomes (crossovers) essential for accurate segregation. In cereals the distribution of crossovers, cytologically evident as chiasmata, is biased toward the distal regions of chromosomes. This creates a bottleneck for plant breeders in the development of varieties with improved agronomic traits, as genes situated in the interstitial and centromere proximal regions of chromosomes rarely recombine. Recent advances in wheat genomics and genome engineering combined with well-developed wheat cytogenetics offer new opportunities to manipulate recombination and unlock genetic variation. As a basis for these investigations we have carried out a detailed analysis of meiotic progression in hexaploid wheat (Triticum aestivum) using immunolocalization of chromosome axis, synaptonemal complex and recombination proteins. 5-Bromo-2'-deoxyuridine (BrdU) labeling was used to determine the chronology of key events in relation to DNA replication. Axis morphogenesis, synapsis and recombination initiation were found to be spatio-temporally coordinated, beginning in the gene-dense distal chromosomal regions and later occurring in the interstitial/proximal regions. Moreover, meiotic progression in the distal regions was coordinated with the conserved chromatin cycles that are a feature of meiosis. This mirroring of the chiasma bias was also evident in the distribution of the gene-associated histone marks, H3K4me3 and H3K27me3; the repeat-associated mark, H3K27me1; and H3K9me3. We believe that this study provides a cytogenetic framework for functional studies and ongoing initiatives to manipulate recombination in the wheat genome.
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Affiliation(s)
- Kim Osman
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Kim Osman
| | - Uthman Algopishi
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - James D. Higgins
- Department of Genetics and Genome Biology, University of Leicester, Leicester, United Kingdom
| | - Ian R. Henderson
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Keith J. Edwards
- School of Biological Sciences, University of Bristol, Bristol, United Kingdom
| | | | - Eugenio Sanchez-Moran
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
- Eugenio Sanchez-Moran
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