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Jiang R, Li WV, Li JJ. mbImpute: an accurate and robust imputation method for microbiome data. Genome Biol 2021; 22:192. [PMID: 34183041 PMCID: PMC8240317 DOI: 10.1186/s13059-021-02400-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 06/04/2021] [Indexed: 12/22/2022] Open
Abstract
A critical challenge in microbiome data analysis is the existence of many non-biological zeros, which distort taxon abundance distributions, complicate data analysis, and jeopardize the reliability of scientific discoveries. To address this issue, we propose the first imputation method for microbiome data-mbImpute-to identify and recover likely non-biological zeros by borrowing information jointly from similar samples, similar taxa, and optional metadata including sample covariates and taxon phylogeny. We demonstrate that mbImpute improves the power of identifying disease-related taxa from microbiome data of type 2 diabetes and colorectal cancer, and mbImpute preserves non-zero distributions of taxa abundances.
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Affiliation(s)
- Ruochen Jiang
- Department of Statistics, University of California, Los Angeles, 90095-1554, CA, USA
| | - Wei Vivian Li
- Department of Statistics, University of California, Los Angeles, 90095-1554, CA, USA
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, 08854, NJ, USA
| | - Jingyi Jessica Li
- Department of Statistics, University of California, Los Angeles, 90095-1554, CA, USA.
- Department of Human Genetics, University of California, Los Angeles, 90095-7088, CA, USA.
- Department of Computational Medicine, University of California, Los Angeles, 90095-1766, CA, USA.
- Department of Biostatistics, University of California, Los Angeles, 90095-1772, CA, USA.
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Melanda GCS, Accioly T, Ferreira RJ, Rodrigues ACM, Cabral TS, Coelho G, Sulzbacher MA, Cortez VG, Grebenc T, Martín MP, Baseia IG. Diversity trapped in cages: Revision of Blumenavia Möller (Clathraceae, Basidiomycota) reveals three hidden species. PLoS One 2020; 15:e0232467. [PMID: 32357194 PMCID: PMC7194408 DOI: 10.1371/journal.pone.0232467] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 04/12/2020] [Indexed: 01/27/2023] Open
Abstract
Basidiomata of Phallales have a diversified morphology with adhesive gleba that exudes an odor, usually unpleasant that attracts mainly insects, which disperse the basidiospores. The genus Blumenavia belongs to the family Clathraceae and, based on morphological features, only two species are currently recognized: B. rhacodes and B. angolensis. However, the morphological characters adopted in species delimitations within this genus are inconsistent, and molecular data are scarce. The present study aimed to review and identify informative characters that contribute to the delimitation of Blumenavia species. Exsiccates from America and Africa were analyzed morphologically, and molecularly, using ITS, LSU, ATP6, RPB2 and TEF-1α markers for Maximum Parsimony, Bayesian and Maximum likelihood analyses, and also for coalescent based species delimitations (BP&P), as well as for bPTP, PhyloMap, Topo-phylogenetic and Geophylogenetic reconstructions. According to our studies, seven species can be considered in the genus: B. rhacodes and B. angolensis are maintained, B. usambarensis and B. toribiotalpaensis are reassessed, and three new species are proposed, B. baturitensis Melanda, M.P. Martín & Baseia, sp. nov., B. crucis-hellenicae G. Coelho, Sulzbacher, Grebenc & Cortez, sp. nov., and B. heroica Melanda, Baseia & M.P. Martín, sp. nov. Blumenavia rhacodes is typified by selecting a lectotype and an epitype. Macromorphological characters considered informative to segregate and delimit the species through integrative taxonomy include length of the basidiomata, color, width and presence of grooves on each arm as well as the glebifer position and shape. These must be clearly observed while the basidiomata are still fresh. Since most materials are usually analyzed after dehydration and deposit in collections, field techniques and protocols to describe fugacious characters from fresh specimen are demanded, as well as the use of molecular analysis, in order to better assess recognition and delimitation of species in Blumenavia.
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Affiliation(s)
- Gislaine C. S. Melanda
- Departamento de Botânica e Zoologia, Programa de Pós-Graduação em Sistemática e Evolução, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Thiago Accioly
- Departamento de Botânica e Zoologia, Programa de Pós-Graduação em Sistemática e Evolução, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Renato J. Ferreira
- Departamento de Micologia, Programa de Pós-Graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Ana C. M. Rodrigues
- Departamento de Micologia, Programa de Pós-Graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Tiara S. Cabral
- Programa de Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil
| | - Gilberto Coelho
- Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | | | - Vagner G. Cortez
- Departamento de Biodiversidade, Universidade Federal do Paraná—Setor Palotina, Palotina, Paraná, Brazil
| | - Tine Grebenc
- Slovenian Forestry Institute, Ljubljana, Slovenia
| | - María P. Martín
- Departamento de Micología, Real Jardín Botánico-CSIC, Madrid, Spain
| | - Iuri G. Baseia
- Departamento de Botânica e Zoologia, Programa de Pós-Graduação em Sistemática e Evolução, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
- Departamento de Micologia, Programa de Pós-Graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
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