Updated taxonomic descriptions, iconography, and habitat preferences of &lt;em&gt;Brachypodium distachyon, B. stacei&lt;/em&gt;, and &lt;em&gt;B. hybridum&lt;/em&gt; (Poaceae)

Catalán, Pilar; López-Álvarez, Diana; Bellosta, Cristina; Villar, Luis

doi:10.3989/ajbm.2428

Cited by 32 publications

(51 citation statements)

References 26 publications

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“…Brachypodium is a small genus in the family Poaceae that contains c . 20 species (17 perennial and three annual) distributed worldwide (Schippmann, ; Catalán & Olmstead, ; Catalán et al ., , ,b). The three annuals include two diploids ( B. distachyon (2 n = 2 x = 10; x = 5), B. stacei (2 n = 2 x = 20; x = 10)) and their derived allotetraploid ( B. hybridum (2 n = 4 x = 30; x = 5 + 10)).…”

Section: Introductionmentioning

confidence: 97%

“…The evolutionary relationship between Brachypodium and other grasses has been thoroughly studied (Catalán et al ., ; Catalán & Olmstead, ; Döring et al ., ). Most recent phylogenetic analyses place Brachypodium in an intermediate position within the Pooideae clade (Minaya et al ., ; Soreng et al ., ; Catalán et al ., ,b). By contrast, only a few studies of intraspecific variation have been conducted in the genus Brachypodium , primarily focusing on B. distachyon (e.g.…”

Section: Introductionmentioning

confidence: 98%

“…These three species had previously been considered cytotypes of B. distachyon (Catalán et al ., ). In addition to the large, overlapping distribution in their native circum‐Mediterranean region (Catalán et al ., , ; López‐Alvarez et al ., , ), B. hybridum has naturalized extensively around the world.…”

Section: Introductionmentioning

confidence: 99%

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Comparative plastome genomics and phylogenomics of Brachypodium: flowering time signatures, introgression and recombination in recently diverged ecotypes

et al. 2017

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Few pan-genomic studies have been conducted in plants, and none of them have focused on the intraspecific diversity and evolution of their plastid genomes. We address this issue in Brachypodium distachyon and its close relatives B. stacei and B. hybridum, for which a large genomic data set has been compiled. We analyze inter- and intraspecific plastid comparative genomics and phylogenomic relationships within a family-wide framework. Major indel differences were detected between Brachypodium plastomes. Within B. distachyon, we detected two main lineages, a mostly Extremely Delayed Flowering (EDF+) clade and a mostly Spanish (S+) - Turkish (T+) clade, plus nine chloroplast capture and two plastid DNA (ptDNA) introgression and micro-recombination events. Early Oligocene (30.9 million yr ago (Ma)) and Late Miocene (10.1 Ma) divergence times were inferred for the respective stem and crown nodes of Brachypodium and a very recent Mid-Pleistocene (0.9 Ma) time for the B. distachyon split. Flowering time variation is a main factor driving rapid intraspecific divergence in B. distachyon, although it is counterbalanced by repeated introgression between previously isolated lineages. Swapping of plastomes between the three different genomic groups, EDF+, T+, S+, probably resulted from random backcrossing followed by stabilization through selection pressure.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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Comparative plastome genomics and phylogenomics of Brachypodium: flowering time signatures, introgression and recombination in recently diverged ecotypes

et al. 2017

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“…B. distachyon was considered to be formed by three cytotypes with 10, 20, and 30 chromosomes. However, cytogenetic [28,29] and biochemical and molecular studies [29][30][31][32][33] have shown that there are three species: Two diploid B. distachyon (2n = 10) and B. stacei (2I = 20) and one tetraploid B. hybridum (2n = 30), derived from the hybridization and subsequent chromosomal duplication of distachyon and stacei [27,34,35]. These three species are proposed as a model polyploid speciation of grasses [27,[34][35][36] and may also contribute to the breeding of cultivated polyploid cereals.…”

Section: Introductionmentioning

confidence: 99%

“…However, cytogenetic [28,29] and biochemical and molecular studies [29][30][31][32][33] have shown that there are three species: Two diploid B. distachyon (2n = 10) and B. stacei (2I = 20) and one tetraploid B. hybridum (2n = 30), derived from the hybridization and subsequent chromosomal duplication of distachyon and stacei [27,34,35]. These three species are proposed as a model polyploid speciation of grasses [27,[34][35][36] and may also contribute to the breeding of cultivated polyploid cereals. B. distachyon has also been proposed as a model system for the study of the genetic basis of RSA in cereals, for which it is necessary to know the variability that RSA presents in different genotypes and species of the genus Brachypodium, and how RSA changes in different environmental conditions [26,36,37].…”

Section: Introductionmentioning

confidence: 99%

Molecular Genetic Analysis of Drought Stress Response Traits in Brachypodium spp.

et al. 2020

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The root is the organ responsible for the uptake of water and therefore has a very important role in drought tolerance. The aims of the present work were to characterize nine traits of the root system architecture (RSA) and the shoot dry weight (W) of twelve genotypes of Brachypodium spp. under water stress and to establish the relationship between RSA phenotyping traits and SSRs. Two culture media, one standard (SM) and one (PEG) to induced water stress have been used. In SM medium, B. stacei had the highest values of W and all the RSA traits, except the mean diameter of the seminal roots, followed by B. hybridum and B. distachyon. In the PEG medium, root length increased in B. distachyon, decreased in B. hybridum and remained the same in B. stacei. A two-way hierarchical cluster analysis from 117 polymorphic SSRs and the traits of the RSA of the Brachypodium spp. genotypes, was performed. Brachypodium genotypes were separated into three groups corresponding to each species. In the second way of the hierarchical clustering association were observed between five RSA variables and SSR markers, which could be useful in the search for genes or QTLs related to RSA characters.

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Enriched root bacterial microbiome in invaded vs native ranges of the model grass allotetraploid Brachypodium hybridum

et al. 2021

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Invasive species can shift the composition of key soil microbial groups, thus creating novel soil microbial communities. To better understand the biological drivers of invasion, we studied plant-microbial interactions in species of the Brachypodium distachyon complex, a model system for functional genomic studies of temperate grasses and bioenergy crops. While Brachypodium hybridum invasion in California is in an incipient stage, threatening natural and agricultural systems, its diploid progenitor species B. distachyon is not invasive in California. We investigated the root, soil, and rhizosphere bacterial composition of Brachypodium hybridum in both its native and invaded range, and of B. distachyon in the native range. We used high-throughput, amplicon sequencing to evaluate if the bacteria associated with these plants differ, and whether biotic controls may be driving B. hybridum invasion. Bacterial community composition of B. hybridum differed based on provenance (native or invaded range) for root, rhizosphere, and bulk soils, as did the abundance of dominant bacterial taxa. Bacteroidetes, Cyanobacteria and Bacillus spp. (species) were significantly more abundant in B. hybridum roots from the invaded range, whereas Proteobacteria, Firmicutes, Erwinia and Pseudomonas were more abundant in the native range roots. Brachypodium hybridum forms novel biotic interactions with a diverse suite of rhizosphere microbes from the invaded range, which may not exert a similar influence within its native range, ostensibly contributing to B. hybridum’s invasiveness. These associated plant microbiomes could inform future management approaches for B. hybridum in its invaded range and could be key to understanding, predicting, and preventing future plant invasions.

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Updated taxonomic descriptions, iconography, and habitat preferences of <em>Brachypodium distachyon, B. stacei</em>, and <em>B. hybridum</em> (Poaceae)

Cited by 32 publications

References 26 publications

Comparative plastome genomics and phylogenomics of Brachypodium: flowering time signatures, introgression and recombination in recently diverged ecotypes

Comparative plastome genomics and phylogenomics of Brachypodium: flowering time signatures, introgression and recombination in recently diverged ecotypes

Molecular Genetic Analysis of Drought Stress Response Traits in Brachypodium spp.

Enriched root bacterial microbiome in invaded vs native ranges of the model grass allotetraploid Brachypodium hybridum

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