Evolution and taxonomic split of the model grass Brachypodium distachyon

Catalán, Pilar; Müller, Jochen A.; Hasterok, Robert; Jenkins, Glyn; Mur, Luis A. J.; Langdon, Tim; Betekhtin, Alexander; Siwinska, Dorota; Pimentel, Manuel; López-Álvarez, Diana

doi:10.1093/aob/mcr294

Cited by 169 publications

(263 citation statements)

References 49 publications

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“…The higher number of specimens and populations used in this study, compared to those in , makes these results more likely. In agreement with Catalán et al (2012), our current results show that B. stacei and B. hybridum are, overall, taller and more robust plant species than B. distachyon, and that the allotetraploid shows larger measurements in several traits (leaf stomatal guard cell length, pollen grain length, and number of culm nodes) than either of its diploid parents, a likely consequence of polyploidy and heterosis. Correlation between increasing ploidy level and larger pollen grain and stomata guard cell sizes have been also found in other grasses and angiosperms [e.g., Lolium L., Speckman & al.…”

Section: Taxonomy Ecology and Evolutionsupporting

confidence: 90%

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

Catalán

López-Álvarez

Bellosta

et al. 2016

Anal. Jard. Bot. Madr.

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Section: Taxonomy Ecology and Evolutionsupporting

confidence: 90%

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

Catalán

López-Álvarez

Bellosta

et al. 2016

Anal. Jard. Bot. Madr.

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“…Additionally, the potential of different brachypodium species, including polyploid species [e.g. allotetraploid B. hybridum (Catalán et al, 2012)] and perennial diploid B. sylvaticum (Steinwand et al 2013) to complement the use of B. distachyon as a model, has recently been recognized. A number of polyploid brachypodium species that may differ from diploid species for various adaptive traits such as drought tolerance have been described (Manzaneda et al, 2012).…”

Section: Future Prospects For Brachypodium As a Model For Cereal-pathmentioning

confidence: 99%

Brachypodium as an emerging model for cereal–pathogen interactions

et al. 2015

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Background Cereal diseases cause tens of billions of dollars of losses annually and have devastating humanitarian consequences in the developing world. Increased understanding of the molecular basis of cereal host-pathogen interactions should facilitate development of novel resistance strategies. However, achieving this in most cereals can be challenging due to large and complex genomes, long generation times and large plant size, as well as quarantine and intellectual property issues that may constrain the development and use of community resources. Brachypodium distachyon (brachypodium) with its small, diploid and sequenced genome, short generation time, high transformability and rapidly expanding community resources is emerging as a tractable cereal model.Scope Recent research reviewed here has demonstrated that brachypodium is either susceptible or partially susceptible to many of the major cereal pathogens. Thus, the study of brachypodium-pathogen interactions appears to hold great potential to improve understanding of cereal disease resistance, and to guide approaches to enhance this resistance. This paper reviews brachypodium experimental pathosystems for the study of fungal, bacterial and viral cereal pathogens; the current status of the use of brachypodium for functional analysis of cereal disease resistance; and comparative genomic approaches undertaken using brachypodium to assist characterization of cereal resistance genes. Additionally, it explores future prospects for brachypodium as a model to study cereal-pathogen interactions.Conclusions The study of brachypodium-pathogen interactions appears to be a productive strategy for understanding mechanisms of disease resistance in cereal species. Knowledge obtained from this model interaction has strong potential to be exploited for crop improvement.

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“…Until recently, it was considered that B. distachyon was integrated by three cytotypes with 2n = 10, 20 and 30. The taxonomic classification has been reviewed by Catalán et al (2012) and has been proposed to each cytotypes a different species named as B. distachyon (2n = 10), B. stacei (2n = 20) and B. hybridum that is an allotetraploid (2n = 30, x = 5 + x = 10) derived from the cross between the above two. The results of basic and applied research into these three species and specially in B. distachyon, will serve as a reference to allow genetic improvements to be made in cereals of greater economic importance, such as wheat, barley, oats, etc.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of root system architecture in seedlings ofBrachypodium spp.using three plant growth supports

González

Friero

Selfa

et al. 2016

Cereal Research Communications

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This work reports a rapid procedure of comparing root development among different genotypes of Brachypodium spp., using three plant growth supports: gel chamber, 'Termita' chamber and Whatman paper. Eight variables of the root system architecture (RSA) (number of seminal roots, number of lateral roots, total length of the roots, length of the primary root, mean diameter of the roots, mean diameter of the primary root, total surface area and total volume of the roots) were studied in seedling of four genotypes each of Brachypodium distachyon, B. stacei and B. hybridum. Correlations between pairs of growth supports in terms of the eight variables examined were highly significant. In all three supports, B. stacei showed the greatest root system development while B. distachyon showed the least; B. hybridum, an allotetraploid species derived from hybridization between B. distachyon and B. stacei, showed intermediate development. ANOVA and LSD tests showed that significant differences exist between the supports, species and genotypes with respect to all the variables analysed. A cluster analysis was conducted to determine if the RSA traits could be used to differentiate the species and genotypes of Brachypodium. This analysis allowed differentiated between the three species and twelve genotypes of Brachypodium spp., although a certain overlap between species was observed. The Whatman paper support was the easiest to use, and is recommended for the characterization of large collections of genotypes.

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Evolution and taxonomic split of the model grass Brachypodium distachyon

Cited by 169 publications

References 49 publications

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

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

Brachypodium as an emerging model for cereal–pathogen interactions

A comparative study of root system architecture in seedlings ofBrachypodium spp.using three plant growth supports

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