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Hlavatá K, Záveská E, Leong-Škorničková J, Pouch M, Poulsen AD, Šída O, Khadka B, Mandáková T, Fér T. Ancient hybridization and repetitive element proliferation in the evolutionary history of the monocot genus Amomum (Zingiberaceae). FRONTIERS IN PLANT SCIENCE 2024; 15:1324358. [PMID: 38708400 PMCID: PMC11066291 DOI: 10.3389/fpls.2024.1324358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 03/12/2024] [Indexed: 05/07/2024]
Abstract
Genome size variation is a crucial aspect of plant evolution, influenced by a complex interplay of factors. Repetitive elements, which are fundamental components of genomic architecture, often play a role in genome expansion by selectively amplifying specific repeat motifs. This study focuses on Amomum, a genus in the ginger family (Zingiberaceae), known for its 4.4-fold variation in genome size. Using a robust methodology involving PhyloNet reconstruction, RepeatExplorer clustering, and repeat similarity-based phylogenetic network construction, we investigated the repeatome composition, analyzed repeat dynamics, and identified potential hybridization events within the genus. Our analysis confirmed the presence of four major infrageneric clades (A-D) within Amomum, with clades A-C exclusively comprising diploid species (2n = 48) and clade D encompassing both diploid and tetraploid species (2n = 48 and 96). We observed an increase in the repeat content within the genus, ranging from 84% to 89%, compared to outgroup species with 75% of the repeatome. The SIRE lineage of the Ty1-Copia repeat superfamily was prevalent in most analyzed ingroup genomes. We identified significant difference in repeatome structure between the basal Amomum clades (A, B, C) and the most diverged clade D. Our investigation revealed evidence of ancient hybridization events within Amomum, coinciding with a substantial proliferation of multiple repeat groups. This finding supports the hypothesis that ancient hybridization is a driving force in the genomic evolution of Amomum. Furthermore, we contextualize our findings within the broader context of genome size variations and repeatome dynamics observed across major monocot lineages. This study enhances our understanding of evolutionary processes within monocots by highlighting the crucial roles of repetitive elements in shaping genome size and suggesting the mechanisms that drive these changes.
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Affiliation(s)
- Kristýna Hlavatá
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
| | - Eliška Záveská
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
- Institute of Botany, Czech Academy of Science, Průhonice, Czechia
| | - Jana Leong-Škorničková
- Herbarium, Singapore Botanic Gardens, National Parks Board, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Milan Pouch
- Central European Institute of Technology, Masaryk University, Brno, Czechia
- National Center for Biomolecular Research (NCBR), Masaryk University, Kamenice, Czechia
| | - Axel Dalberg Poulsen
- Tropical Diversity Section, Royal Botanic Garden Edinburgh, Edinburgh, United Kingdom
| | - Otakar Šída
- Department of Botany, National Museum in Prague, Prague, Czechia
| | - Bijay Khadka
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
| | - Terezie Mandáková
- Central European Institute of Technology, Masaryk University, Brno, Czechia
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czechia
| | - Tomáš Fér
- Department of Botany, Faculty of Science, Charles University, Prague, Czechia
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McEvoy SL, Grady PGS, Pauloski N, O'Neill RJ, Wegrzyn JL. Profiling genome-wide methylation in two maples: Fine-scale approaches to detection with nanopore technology. Evol Appl 2024; 17:e13669. [PMID: 38633133 PMCID: PMC11022628 DOI: 10.1111/eva.13669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 02/04/2024] [Accepted: 02/12/2024] [Indexed: 04/19/2024] Open
Abstract
DNA methylation is critical to the regulation of transposable elements and gene expression and can play an important role in the adaptation of stress response mechanisms in plants. Traditional methods of methylation quantification rely on bisulfite conversion that can compromise accuracy. Recent advances in long-read sequencing technologies allow for methylation detection in real time. The associated algorithms that interpret these modifications have evolved from strictly statistical approaches to Hidden Markov Models and, recently, deep learning approaches. Much of the existing software focuses on methylation in the CG context, but methylation in other contexts is important to quantify, as it is extensively leveraged in plants. Here, we present methylation profiles for two maple species across the full range of 5mC sequence contexts using Oxford Nanopore Technologies (ONT) long-reads. Hybrid and reference-guided assemblies were generated for two new Acer accessions: Acer negundo (box elder; 65x ONT and 111X Illumina) and Acer saccharum (sugar maple; 93x ONT and 148X Illumina). The ONT reads generated for these assemblies were re-basecalled, and methylation detection was conducted in a custom pipeline with the published Acer references (PacBio assemblies) and hybrid assemblies reported herein to generate four epigenomes. Examination of the transposable element landscape revealed the dominance of LTR Copia elements and patterns of methylation associated with different classes of TEs. Methylation distributions were examined at high resolution across gene and repeat density and described within the broader angiosperm context, and more narrowly in the context of gene family dynamics and candidate nutrient stress genes.
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Affiliation(s)
- Susan L. McEvoy
- Department of Ecology and Evolutionary BiologyUniversity of ConnecticutStorrsConnecticutUSA
- Department of Forest SciencesUniversity of HelsinkiHelsinkiFinland
| | - Patrick G. S. Grady
- Department of Molecular and Cell BiologyUniversity of ConnecticutStorrsConnecticutUSA
| | - Nicole Pauloski
- Department of Molecular and Cell BiologyUniversity of ConnecticutStorrsConnecticutUSA
- Institute for Systems GenomicsUniversity of ConnecticutStorrsConnecticutUSA
| | - Rachel J. O'Neill
- Department of Molecular and Cell BiologyUniversity of ConnecticutStorrsConnecticutUSA
- Institute for Systems GenomicsUniversity of ConnecticutStorrsConnecticutUSA
| | - Jill L. Wegrzyn
- Department of Ecology and Evolutionary BiologyUniversity of ConnecticutStorrsConnecticutUSA
- Institute for Systems GenomicsUniversity of ConnecticutStorrsConnecticutUSA
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Qin Y, Zhao H, Han H, Zhu G, Wang Z, Li F. Chromosome-Level Genome Assembly and Population Genomic Analyses Reveal Geographic Variation and Population Genetic Structure of Prunus tenella. Int J Mol Sci 2023; 24:11735. [PMID: 37511492 PMCID: PMC10380494 DOI: 10.3390/ijms241411735] [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: 05/15/2023] [Revised: 07/08/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Prunus tenella is a rare and precious relict plant in China. It is an important genetic resource for almond improvement and an indispensable material in ecological protection and landscaping. However, the research into molecular breeding and genetic evolution has been severely restricted due to the lack of genome information. In this investigation, we created a chromosome-level genomic pattern of P. tenella, 231 Mb in length with a contig N50 of 18.1 Mb by Hi-C techniques and high-accuracy PacBio HiFi sequencing. The present assembly predicted 32,088 protein-coding genes, and an examination of the genome assembly indicated that 94.7% among all assembled transcripts were alignable to the genome assembly; most (97.24%) were functionally annotated. By phylogenomic genome comparison, we found that P. tenella is an ancient group that diverged approximately 13.4 million years ago (mya) from 13 additional closely related species and about 6.5 Mya from the cultivated almond. Collinearity analysis revealed that P. tenella is highly syntenic and has high sequence conservation with almond and peach. However, this species also exhibits many presence/absence variants. Moreover, a large inversion at the 7588 kb position of chromosome 5 was observed, which may have a significant association with phenotypic traits. Lastly, population genetic structure analysis in eight different populations indicated a high genetic differentiation among the natural distribution of P. tenella. This high-quality genome assembly provides critical clues and comprehensive information for the systematic evolution, genetic characteristics, and functional gene research of P. tenella. Moreover, it provides a valuable genomic resource for in-depth study in protection, developing, and utilizing P. tenella germplasm resources.
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Affiliation(s)
- Yue Qin
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou 450003, China
| | - Han Zhao
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou 450003, China
| | - Hongwei Han
- Economic Forest Research Institute, Xinjiang Academy of Forestry, Urumqi 830000, China
| | - Gaopu Zhu
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou 450003, China
| | - Zhaoshan Wang
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Fangdong Li
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou 450003, China
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Suguiyama VF, Rodriguez JDP, Dos Santos TCN, Lira BS, de Haro LA, Silva JPN, Borba EL, Purgatto E, da Silva EA, Bellora N, Carrari F, Centeno DDC, Bermúdez LF, Rossi M, de Setta N. Regulatory mechanisms behind the phenotypic plasticity associated with Setaria italica water deficit tolerance. PLANT MOLECULAR BIOLOGY 2022; 109:761-780. [PMID: 35524936 DOI: 10.1007/s11103-022-01273-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Drought is one of the main environmental stresses that negatively impacts vegetative and reproductive yield. Water deficit responses are determined by the duration and intensity of the stress, which, together with plant genotype, will define the chances of plant survival. The metabolic adjustments in response to water deficit are complex and involve gene expression modulation regulated by DNA-binding proteins and epigenetic modifications. This last mechanism may also regulate the activity of transposable elements, which in turn impact the expression of nearby loci. Setaria italica plants submitted to five water deficit regimes were analyzed through a phenotypical approach, including growth, physiological, RNA-seq and sRNA-seq analyses. The results showed a progressive reduction in yield as a function of water deficit intensity associated with signaling pathway modulation and metabolic adjustments. We identified a group of loci that were consistently associated with drought responses, some of which were related to water deficit perception, signaling and regulation. Finally, an analysis of the transcriptome and sRNAome allowed us to identify genes putatively regulated by TE- and sRNA-related mechanisms and an intriguing positive correlation between transcript levels and sRNA accumulation in gene body regions. These findings shed light on the processes that allow S. italica to overcome drought and survive under water restrictive conditions.
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Affiliation(s)
- Vanessa Fuentes Suguiyama
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
| | | | | | - Bruno Silvestre Lira
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Luis Alejandro de Haro
- Departament of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - João Paulo Naldi Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
| | - Eduardo Leite Borba
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Eduardo Purgatto
- Departamento de Alimentos e Nutrição Experimental, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Emerson Alves da Silva
- Instituto de Botânica da Secretaria do Meio Ambiente do Estado de São Paulo, São Paulo, SP, Brazil
| | - Nicolas Bellora
- Institute of Nuclear Technologies for Health (Intecnus), National Scientific and Technical Research Council (CONICET), 8400, Bariloche, Argentina
| | - Fernando Carrari
- Instituto de Agrobiotecnología Y Biología Molecular (IABIMO), CICVYA, INTA-CONICET, Hurlingham, Argentina
- Cátedra de Genética, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Danilo da Cruz Centeno
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
| | - Luisa Fernanda Bermúdez
- Instituto de Agrobiotecnología Y Biología Molecular (IABIMO), CICVYA, INTA-CONICET, Hurlingham, Argentina
- Cátedra de Genética, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Magdalena Rossi
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Nathalia de Setta
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil.
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5
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Abrouk M, Ahmed HI, Cubry P, Šimoníková D, Cauet S, Pailles Y, Bettgenhaeuser J, Gapa L, Scarcelli N, Couderc M, Zekraoui L, Kathiresan N, Čížková J, Hřibová E, Doležel J, Arribat S, Bergès H, Wieringa JJ, Gueye M, Kane NA, Leclerc C, Causse S, Vancoppenolle S, Billot C, Wicker T, Vigouroux Y, Barnaud A, Krattinger SG. Fonio millet genome unlocks African orphan crop diversity for agriculture in a changing climate. Nat Commun 2020; 11:4488. [PMID: 32901040 DOI: 10.1101/2020.04.11.037671] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 08/16/2020] [Indexed: 05/28/2023] Open
Abstract
Sustainable food production in the context of climate change necessitates diversification of agriculture and a more efficient utilization of plant genetic resources. Fonio millet (Digitaria exilis) is an orphan African cereal crop with a great potential for dryland agriculture. Here, we establish high-quality genomic resources to facilitate fonio improvement through molecular breeding. These include a chromosome-scale reference assembly and deep re-sequencing of 183 cultivated and wild Digitaria accessions, enabling insights into genetic diversity, population structure, and domestication. Fonio diversity is shaped by climatic, geographic, and ethnolinguistic factors. Two genes associated with seed size and shattering showed signatures of selection. Most known domestication genes from other cereal models however have not experienced strong selection in fonio, providing direct targets to rapidly improve this crop for agriculture in hot and dry environments.
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Affiliation(s)
- Michael Abrouk
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Hanin Ibrahim Ahmed
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | | | - Denisa Šimoníková
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | | | - Yveline Pailles
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Jan Bettgenhaeuser
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Liubov Gapa
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | | | | | | | - Nagarajan Kathiresan
- Supercomputing Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Jana Čížková
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Eva Hřibová
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Jaroslav Doležel
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | | | - Hélène Bergès
- CNRGV Plant Genomics Center, INRAE, Toulouse, France
- Inari Agriculture, One Kendall Square Building 600/700, Cambridge, MA, 02139, USA
| | | | - Mathieu Gueye
- Laboratoire de Botanique, Département de Botanique et Géologie, IFAN Ch. A. Diop/UCAD, Dakar, Senegal
| | - Ndjido A Kane
- Senegalese Agricultural Research Institute, Dakar, Senegal
- Laboratoire Mixte International LAPSE, Dakar, Senegal
| | - Christian Leclerc
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Sandrine Causse
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Sylvie Vancoppenolle
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Claire Billot
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Thomas Wicker
- Department of Plant and Microbial Biology, University of Zurich, Zürich, Switzerland
| | | | - Adeline Barnaud
- DIADE, Univ Montpellier, IRD, Montpellier, France.
- Laboratoire Mixte International LAPSE, Dakar, Senegal.
| | - Simon G Krattinger
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
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6
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Abrouk M, Ahmed HI, Cubry P, Šimoníková D, Cauet S, Pailles Y, Bettgenhaeuser J, Gapa L, Scarcelli N, Couderc M, Zekraoui L, Kathiresan N, Čížková J, Hřibová E, Doležel J, Arribat S, Bergès H, Wieringa JJ, Gueye M, Kane NA, Leclerc C, Causse S, Vancoppenolle S, Billot C, Wicker T, Vigouroux Y, Barnaud A, Krattinger SG. Fonio millet genome unlocks African orphan crop diversity for agriculture in a changing climate. Nat Commun 2020; 11:4488. [PMID: 32901040 PMCID: PMC7479619 DOI: 10.1038/s41467-020-18329-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 08/16/2020] [Indexed: 01/24/2023] Open
Abstract
Sustainable food production in the context of climate change necessitates diversification of agriculture and a more efficient utilization of plant genetic resources. Fonio millet (Digitaria exilis) is an orphan African cereal crop with a great potential for dryland agriculture. Here, we establish high-quality genomic resources to facilitate fonio improvement through molecular breeding. These include a chromosome-scale reference assembly and deep re-sequencing of 183 cultivated and wild Digitaria accessions, enabling insights into genetic diversity, population structure, and domestication. Fonio diversity is shaped by climatic, geographic, and ethnolinguistic factors. Two genes associated with seed size and shattering showed signatures of selection. Most known domestication genes from other cereal models however have not experienced strong selection in fonio, providing direct targets to rapidly improve this crop for agriculture in hot and dry environments.
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Affiliation(s)
- Michael Abrouk
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Hanin Ibrahim Ahmed
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | | | - Denisa Šimoníková
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | | | - Yveline Pailles
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Jan Bettgenhaeuser
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Liubov Gapa
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | | | | | | | - Nagarajan Kathiresan
- Supercomputing Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Jana Čížková
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Eva Hřibová
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Jaroslav Doležel
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | | | - Hélène Bergès
- CNRGV Plant Genomics Center, INRAE, Toulouse, France
- Inari Agriculture, One Kendall Square Building 600/700, Cambridge, MA, 02139, USA
| | | | - Mathieu Gueye
- Laboratoire de Botanique, Département de Botanique et Géologie, IFAN Ch. A. Diop/UCAD, Dakar, Senegal
| | - Ndjido A Kane
- Senegalese Agricultural Research Institute, Dakar, Senegal
- Laboratoire Mixte International LAPSE, Dakar, Senegal
| | - Christian Leclerc
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Sandrine Causse
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Sylvie Vancoppenolle
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Claire Billot
- CIRAD, UMR AGAP, Montpellier, France
- AGAP, Université de Montpellier, Cirad, INRAE, Institut Agro, Montpellier, France
| | - Thomas Wicker
- Department of Plant and Microbial Biology, University of Zurich, Zürich, Switzerland
| | | | - Adeline Barnaud
- DIADE, Univ Montpellier, IRD, Montpellier, France.
- Laboratoire Mixte International LAPSE, Dakar, Senegal.
| | - Simon G Krattinger
- Center for Desert Agriculture, Biological and Environmental Science & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
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