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Scalabrin S, Magris G, Liva M, Vitulo N, Vidotto M, Scaglione D, Del Terra L, Ruosi MR, Navarini L, Pellegrino G, Berny Mier Y Teran JC, Toniutti L, Suggi Liverani F, Cerutti M, Di Gaspero G, Morgante M. A chromosome-scale assembly reveals chromosomal aberrations and exchanges generating genetic diversity in Coffea arabica germplasm. Nat Commun 2024; 15:463. [PMID: 38263403 PMCID: PMC10805892 DOI: 10.1038/s41467-023-44449-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 12/13/2023] [Indexed: 01/25/2024] Open
Abstract
In order to better understand the mechanisms generating genetic diversity in the recent allotetraploid species Coffea arabica, here we present a chromosome-level assembly obtained with long read technology. Two genomic compartments with different structural and functional properties are identified in the two homoeologous genomes. The resequencing data from a large set of accessions reveals low intraspecific diversity in the center of origin of the species. Across a limited number of genomic regions, diversity increases in some cultivated genotypes to levels similar to those observed within one of the progenitor species, Coffea canephora, presumably as a consequence of introgressions deriving from the so-called Timor hybrid. It also reveals that, in addition to few, early-occurring exchanges between homoeologous chromosomes, there are numerous recent chromosomal aberrations including aneuploidies, deletions, duplications and exchanges. These events are still polymorphic in the germplasm and could represent a fundamental source of genetic variation in such a lowly variable species.
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Affiliation(s)
| | - Gabriele Magris
- Istituto di Genomica Applicata, 33100, Udine, Italy
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100, Udine, Italy
| | - Mario Liva
- IGA Technology Services, 33100, Udine, Italy
- Istituto di Genomica Applicata, 33100, Udine, Italy
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100, Udine, Italy
| | - Nicola Vitulo
- Department of Biotechnology, University of Verona, 37134, Verona, Italy
| | | | | | | | | | | | | | | | - Lucile Toniutti
- World Coffee Research, Portland, 97225, OR, USA
- CIRAD, UMR AGAP Institut, 97130, Capesterre-Belle-Eau, Guadeloupe, France
- UMR AGAP Institut, University of Montpellier, CIRAD, INRAE, Institut Agro, 34060, Montpellier, France
| | | | | | | | - Michele Morgante
- Istituto di Genomica Applicata, 33100, Udine, Italy.
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100, Udine, Italy.
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Hou BH, Tsai YH, Chiang MH, Tsao SM, Huang SH, Chao CP, Chen HM. Cultivar-specific markers, mutations, and chimerisim of Cavendish banana somaclonal variants resistant to Fusarium oxysporum f. sp. cubense tropical race 4. BMC Genomics 2022; 23:470. [PMID: 35752751 PMCID: PMC9233791 DOI: 10.1186/s12864-022-08692-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 06/13/2022] [Indexed: 11/13/2022] Open
Abstract
Background The selection of tissue culture–derived somaclonal variants of Giant Cavendish banana (Musa spp., Cavendish sub-group AAA) by the Taiwan Banana Research Institute (TBRI) has resulted in several cultivars resistant to Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4), a destructive fungus threatening global banana production. However, the mutations in these somaclonal variants have not yet been determined. We performed an RNA-sequencing (RNA-seq) analysis of three TBRI Foc TR4–resistant cultivars: ‘Tai-Chiao No. 5’ (TC5), ‘Tai-Chiao No. 7’ (TC7), and ‘Formosana’ (FM), as well as their susceptible progenitor ‘Pei-Chiao’ (PC), to investigate the sequence variations among them and develop cultivar-specific markers. Results A group of single-nucleotide variants (SNVs) specific to one cultivar were identified from the analysis of RNA-seq data and validated using Sanger sequencing from genomic DNA. Several SNVs were further converted into cleaved amplified polymorphic sequence (CAPS) markers or derived CAPS markers that could identify the three Foc TR4–resistant cultivars among 6 local and 5 international Cavendish cultivars. Compared with PC, the three resistant cultivars showed a loss or alteration of heterozygosity in some chromosomal regions, which appears to be a consequence of single-copy chromosomal deletions. Notably, TC7 and FM shared a common deletion region on chromosome 5; however, different TC7 tissues displayed varying degrees of allele ratios in this region, suggesting the presence of chimerism in TC7. Conclusions This work demonstrates that reliable SNV markers of tissue culture–derived and propagated banana cultivars with a triploid genome can be developed through RNA-seq data analysis. Moreover, the analysis of sequence heterozygosity can uncover chromosomal deletions and chimerism in banana somaclonal variants. The markers obtained from this study will assist with the identification of TBRI Cavendish somaclonal variants for the quality control of tissue culture propagation, and the protection of breeders’ rights. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08692-5.
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Affiliation(s)
- Bo-Han Hou
- Agricultural Biotechnology Research Center, Academia Sinica, 11529, Taipei, Taiwan
| | - Yi-Heng Tsai
- Agricultural Biotechnology Research Center, Academia Sinica, 11529, Taipei, Taiwan
| | - Ming-Hau Chiang
- Agricultural Biotechnology Research Center, Academia Sinica, 11529, Taipei, Taiwan
| | - Shu-Ming Tsao
- Agricultural Biotechnology Research Center, Academia Sinica, 11529, Taipei, Taiwan
| | | | - Chih-Ping Chao
- Taiwan Banana Research Institute, 90442, Pingtung, Taiwan
| | - Ho-Ming Chen
- Agricultural Biotechnology Research Center, Academia Sinica, 11529, Taipei, Taiwan.
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Yang Y, Cuenca J, Wang N, Liang Z, Sun H, Gutierrez B, Xi X, Arro J, Wang Y, Fan P, Londo J, Cousins P, Li S, Fei Z, Zhong GY. A key 'foxy' aroma gene is regulated by homology-induced promoter indels in the iconic juice grape 'Concord'. HORTICULTURE RESEARCH 2020; 7:67. [PMID: 32337050 PMCID: PMC7166211 DOI: 10.1038/s41438-020-0304-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/19/2020] [Accepted: 03/30/2020] [Indexed: 05/25/2023]
Abstract
'Concord', the most well-known juice grape with a parentage of the North American grape species Vitis labrusca L., possesses a special 'foxy' aroma predominantly resulted from the accumulation of methyl anthranilate (MA) in berries. This aroma, however, is often perceived as an undesirable attribute by wine consumers and rarely noticeable in the common table and wine grape species V. vinifera. Here we discovered homology-induced promoter indels as a major genetic mechanism for species-specific regulation of a key 'foxy' aroma gene, anthraniloyl-CoA:methanol acyltransferase (AMAT), that is responsible for MA biosynthesis. We found the absence of a 426-bp and/or a 42-bp sequence in AMAT promoters highly associated with high levels of AMAT expression and MA accumulation in 'Concord' and other V. labrusca-derived grapes. These promoter variants, all with direct and inverted repeats, were further confirmed in more than 1,300 Vitis germplasm. Moreover, functional impact of these indels was validated in transgenic Arabidopsis. Superimposed on the promoter regulation, large structural changes including exonic insertion of a retrotransposon were present at the AMAT locus in some V. vinifera grapes. Elucidation of the AMAT genetic regulation advances our understanding of the 'foxy' aroma trait and makes it genetically trackable and amenable in grapevine breeding.
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Affiliation(s)
- Yingzhen Yang
- US Department of Agriculture-Agricultural Research Service, Grape Genetics Research Unit, Geneva, NY USA
| | - José Cuenca
- US Department of Agriculture-Agricultural Research Service, Grape Genetics Research Unit, Geneva, NY USA
- Present Address: Centro de Citricultura y Producción Vegetal. Instituto Valenciano de Investigaciones Agrarias, Moncada, Valencia, Spain
| | - Nian Wang
- US Department of Agriculture-Agricultural Research Service, Grape Genetics Research Unit, Geneva, NY USA
- Present Address: College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, Hubei China
| | - Zhenchang Liang
- Beijing Key Laboratory of Grape Sciences and Enology, Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Honghe Sun
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY USA
| | - Benjamin Gutierrez
- US Department of Agriculture-Agricultural Research Service, Plant Genetic Resources Unit, Geneva, NY USA
| | - Xiaojun Xi
- US Department of Agriculture-Agricultural Research Service, Plant Genetic Resources Unit, Geneva, NY USA
- Forestry and Pomology Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Jie Arro
- US Department of Agriculture-Agricultural Research Service, Plant Genetic Resources Unit, Geneva, NY USA
| | - Yi Wang
- Beijing Key Laboratory of Grape Sciences and Enology, Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Peige Fan
- Beijing Key Laboratory of Grape Sciences and Enology, Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Jason Londo
- US Department of Agriculture-Agricultural Research Service, Grape Genetics Research Unit, Geneva, NY USA
| | | | - Shaohua Li
- Beijing Key Laboratory of Grape Sciences and Enology, Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Zhangjun Fei
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY USA
- US Department of Agriculture–Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Ithaca, NY USA
| | - Gan-Yuan Zhong
- US Department of Agriculture-Agricultural Research Service, Grape Genetics Research Unit, Geneva, NY USA
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Cattonaro F, Spadotto A, Radovic S, Marroni F. Do you cov me? Effect of coverage reduction on metagenome shotgun sequencing studies. F1000Res 2018; 7:1767. [PMID: 32185014 PMCID: PMC7059852 DOI: 10.12688/f1000research.16804.4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/15/2020] [Indexed: 01/16/2023] Open
Abstract
Shotgun metagenomics sequencing is a powerful tool for the characterization of complex biological matrices, enabling analysis of prokaryotic and eukaryotic organisms and viruses in a single experiment, with the possibility of reconstructing
de novo the whole metagenome or a set of genes of interest. One of the main factors limiting the use of shotgun metagenomics on wide scale projects is the high cost associated with the approach. We set out to determine if it is possible to use shallow shotgun metagenomics to characterize complex biological matrices while reducing costs. We used a staggered mock community to estimate the optimal threshold for species detection. We measured the variation of several summary statistics simulating a decrease in sequencing depth by randomly subsampling a number of reads. The main statistics that were compared are diversity estimates, species abundance, and ability of reconstructing
de novo the metagenome in terms of length and completeness. Our results show that diversity indices of complex prokaryotic, eukaryotic and viral communities can be accurately estimated with 500,000 reads or less, although particularly complex samples may require 1,000,000 reads. On the contrary, any task involving the reconstruction of the metagenome performed poorly, even with the largest simulated subsample (1,000,000 reads). The length of the reconstructed assembly was smaller than the length obtained with the full dataset, and the proportion of conserved genes that were identified in the meta-genome was drastically reduced compared to the full sample. Shallow shotgun metagenomics can be a useful tool to describe the structure of complex matrices, but it is not adequate to reconstruct—even partially—the metagenome.
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Affiliation(s)
| | | | | | - Fabio Marroni
- IGA Technology Services Srl, Udine, Udine, 33100, Italy.,Department of Agricultural, Food, Environmental and Animal Sciences (DI4A), University of Udine, Udine, 33100, Italy
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Roach MJ, Johnson DL, Bohlmann J, van Vuuren HJJ, Jones SJM, Pretorius IS, Schmidt SA, Borneman AR. Population sequencing reveals clonal diversity and ancestral inbreeding in the grapevine cultivar Chardonnay. PLoS Genet 2018; 14:e1007807. [PMID: 30458008 PMCID: PMC6279053 DOI: 10.1371/journal.pgen.1007807] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 12/04/2018] [Accepted: 11/02/2018] [Indexed: 01/08/2023] Open
Abstract
Chardonnay is the basis of some of the world's most iconic wines and its success is underpinned by a historic program of clonal selection. There are numerous clones of Chardonnay available that exhibit differences in key viticultural and oenological traits that have arisen from the accumulation of somatic mutations during centuries of asexual propagation. However, the genetic variation that underlies these differences remains largely unknown. To address this knowledge gap, a high-quality, diploid-phased Chardonnay genome assembly was produced from single-molecule real time sequencing, and combined with re-sequencing data from 15 different Chardonnay clones. There were 1620 markers identified that distinguish the 15 clones. These markers were reliably used for clonal identification of independently sourced genomic material, as well as in identifying a potential genetic basis for some clonal phenotypic differences. The predicted parentage of the Chardonnay haplomes was elucidated by mapping sequence data from the predicted parents of Chardonnay (Gouais blanc and Pinot noir) against the Chardonnay reference genome. This enabled the detection of instances of heterosis, with differentially-expanded gene families being inherited from the parents of Chardonnay. Most surprisingly however, the patterns of nucleotide variation present in the Chardonnay genome indicate that Pinot noir and Gouais blanc share an extremely high degree of kinship that has resulted in the Chardonnay genome displaying characteristics that are indicative of inbreeding.
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Affiliation(s)
- Michael J. Roach
- The Australian Wine Research Institute, Glen Osmond, South Australia, Australia
| | - Daniel L. Johnson
- The Australian Wine Research Institute, Glen Osmond, South Australia, Australia
| | - Joerg Bohlmann
- Michael Smith Laboratories, The University of British Columbia, Vancouver, British Columbia, Canada
- Wine Research Centre, Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hennie J. J. van Vuuren
- Michael Smith Laboratories, The University of British Columbia, Vancouver, British Columbia, Canada
- Wine Research Centre, Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada
| | - Steven J. M. Jones
- Michael Smith Genome Sciences Centre, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Isak S. Pretorius
- Chancellery, Macquarie University, Sydney, New South Wales, Australia
| | - Simon A. Schmidt
- The Australian Wine Research Institute, Glen Osmond, South Australia, Australia
| | - Anthony R. Borneman
- The Australian Wine Research Institute, Glen Osmond, South Australia, Australia
- Department of Genetics and Evolution, University of Adelaide, South Australia, Australia
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Foster TM, Aranzana MJ. Attention sports fans! The far-reaching contributions of bud sport mutants to horticulture and plant biology. HORTICULTURE RESEARCH 2018; 5:44. [PMID: 30038785 PMCID: PMC6046048 DOI: 10.1038/s41438-018-0062-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 06/06/2018] [Indexed: 05/08/2023]
Abstract
A bud sport is a lateral shoot, inflorescence or single flower/fruit with a visibly different phenotype from the rest of the plant. The new phenotype is often caused by a stable somatic mutation in a single cell that is passed on to its clonal descendants and eventually populates part or all of a meristem. In many cases, a bud sport can be vegetatively propagated, thereby preserving the novel phenotype without sexual reproduction. Bud sports provide new characteristics while retaining the desirable qualities of the parent plant, which is why many bud sports have been developed into popular cultivars. We present an overview of the history of bud sports, the causes and methods of detecting somaclonal variation, and the types of mutant phenotypes that have arisen spontaneously. We focus on examples where the molecular or cytological changes causing the phenotype have been identified. Analysis of these sports has provided valuable insight into developmental processes, gene function and regulation, and in some cases has revealed new information about layer-specific roles of some genes. Examination of the molecular changes causing a phenotype and in some cases reversion back to the original state has contributed to our understanding of the mechanisms that drive genomic evolution.
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Affiliation(s)
- Toshi M. Foster
- The New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, 4474 New Zealand
| | - Maria José Aranzana
- IRTA (Institut de Recerca i Tecnologia Agroalimentàries), Barcelona, Spain
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain
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Mercenaro L, Nieddu G, Porceddu A, Pezzotti M, Camiolo S. Sequence Polymorphisms and Structural Variations among Four Grapevine ( Vitis vinifera L.) Cultivars Representing Sardinian Agriculture. FRONTIERS IN PLANT SCIENCE 2017; 8:1279. [PMID: 28775732 PMCID: PMC5517397 DOI: 10.3389/fpls.2017.01279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 07/06/2017] [Indexed: 05/04/2023]
Abstract
The genetic diversity among grapevine (Vitis vinifera L.) cultivars that underlies differences in agronomic performance and wine quality reflects the accumulation of single nucleotide polymorphisms (SNPs) and small indels as well as larger genomic variations. A combination of high throughput sequencing and mapping against the grapevine reference genome allows the creation of comprehensive sequence variation maps. We used next generation sequencing and bioinformatics to generate an inventory of SNPs and small indels in four widely cultivated Sardinian grape cultivars (Bovale sardo, Cannonau, Carignano and Vermentino). More than 3,200,000 SNPs were identified with high statistical confidence. Some of the SNPs caused the appearance of premature stop codons and thus identified putative pseudogenes. The analysis of SNP distribution along chromosomes led to the identification of large genomic regions with uninterrupted series of homozygous SNPs. We used a digital comparative genomic hybridization approach to identify 6526 genomic regions with significant differences in copy number among the four cultivars compared to the reference sequence, including 81 regions shared between all four cultivars and 4953 specific to single cultivars (representing 1.2 and 75.9% of total copy number variation, respectively). Reads mapping at a distance that was not compatible with the insert size were used to identify a dataset of putative large deletions with cultivar Cannonau revealing the highest number. The analysis of genes mapping to these regions provided a list of candidates that may explain some of the phenotypic differences among the Bovale sardo, Cannonau, Carignano and Vermentino cultivars.
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Affiliation(s)
- Luca Mercenaro
- Dipartimento di Agraria, Università degli Studi di SassariSassari, Italy
| | - Giovanni Nieddu
- Dipartimento di Agraria, Università degli Studi di SassariSassari, Italy
| | - Andrea Porceddu
- Dipartimento di Agraria, Università degli Studi di SassariSassari, Italy
| | - Mario Pezzotti
- Dipartimento di Biotecnologie, Università degli Studi di VeronaVerona, Italy
| | - Salvatore Camiolo
- Dipartimento di Agraria, Università degli Studi di SassariSassari, Italy
- *Correspondence: Salvatore Camiolo,
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