Evolutionary process of Hordeum brachyantherum 6x and related tetraploid species revealed by nuclear DNA sequences

Komatsuda, Takao; Salomon, Björn; Bothmer, Roland von

doi:10.1270/jsbbs.59.611

Cited by 15 publications

(16 citation statements)

References 27 publications

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“…For most of these polyploids Asian H. roshevitzii is postulated to be one of the parental species, while it was not involved in the formation of H. depressum. These data clearly support findings by Salomon and Bothmer (1998) and Komatsuda et al (2009) who also hypothesized that H. depressum was derived from hybridization of H. californicum or an extinct species closely related to it with H. intercedens. The other New World polyploids were all characterized as 'jubatum' type by Taketa et al (2005), as either H. jubatum was directly involved as hybridization partner in their evolution or, like H. jubatum, they originated via crosses between an Asian and an American taxon.…”

Section: Cytological Analyses Within Hordeumsupporting

confidence: 90%

Progress in phylogenetic analysis and a new infrageneric classification of the barley genus Hordeum (Poaceae: Triticeae)

Blattner

2009

Breed. Sci.

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During the last decade several phylogenetic studies of Hordeum were published using a multitude of loci from the chloroplast and nuclear genomes. In many studies taxon sampling was not representative and, thus, does not allow the inference of relationships among species. Generally, chloroplast data seem not suitable for reliable phylogenetic results, as far reaching incomplete lineage sorting result in nearly arbitrary species relationships within narrow species groups, depending on the individuals included in the analyses. Nuclear loci initially resulted at contradictory phylogenetic hypotheses. However, combining at least three nuclear loci in total evidence analyses finally provides consistent relationships among Hordeum species groups, and supports data from earlier cytological and karyological studies. Thus, recently published phylogenies agree on the monophyly of the four Hordeum genome groups (H, I, Xa, Xu), monophyly of the H/Xu and I/Xa groups, and separation between Asian and American members within the I-genome group. A new infrageneric classification of Hordeum is proposed, dividing the genus in subgenus Hordeum comprising sections Hordeum and Trichostachys, and subgenus Hordeastrum with sections Marina, Nodosa, and Stenostachys. The latter consists of two series reflecting the geographical distribution of the taxa, i.e. series Sibirica with Central Asian taxa and series Critesion comprising native taxa from the Americas. In section Nodosa all allopolyploid taxa are grouped, which are characterized by I/Xa genome combinations.

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Section: Cytological Analyses Within Hordeumsupporting

confidence: 90%

Progress in phylogenetic analysis and a new infrageneric classification of the barley genus Hordeum (Poaceae: Triticeae)

Blattner

2009

Breed. Sci.

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“…californicum as the maternal parent to H. depressum (Doebley et al 1992;Jakob and Blattner 2006). Komatsuda et al (2009), based on vrs1 sequence data, hypothesized that H. depressum was derived from the hybridization of American H. brachyantherum subsp. californicum (or an extinct species closely related to it) with American H. intercedens.…”

Section: Origin Of Tetraploid Speciesmentioning

confidence: 99%

“…Chloroplast DNA sequence data divided the I genome group of Hordeum species into "New World" and "Old World" groups (Doebley et al 1992;Nishikawa et al 2002). Some effort has been committed to investigating the origin of the I genome group of polyploid species (Taketa et al 2001(Taketa et al , 2005Blattner 2006;Jakob and Blattner 2006;Komatsuda et al 2009). Taketa et al (2001Taketa et al ( , 2005 analyzed American ployploid species using fluorescent in situ hybridization (FISH) and rDNA-RFLP patterns and suggested Asian Hordeum roshevitzii and American Hordeum brachyantherum subsp.…”

Section: Introductionmentioning

confidence: 99%

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Molecular phylogeny and reticulate origins of several American polyploid Hordeum species

WangHuan

SunGenlou

2011

Botany

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The phylogeny of diploid species in the genus Hordeum has been studied intensively. Although the origin of American polyploid species has been analyzed using multiple-copy internal transcribed spacer sequences, the origins of these species in Hordeum remain unclear. The objectives of our study were to elucidate the origins of American polyploid species and to explore phylogenetic relationships of these polyploids to diploid Hordeum and other diploid species in Triticeae using a single copy of a nuclear gene, disrupted meiotic cDNA1 (DMC1). DMC1 sequences from nine Hordeum polyploid species were analyzed. Sequence comparisons revealed that one copy of sequences from polyploid species Hordeum fuegianum, Hordeum jubatum, and Hordeum tetraploidum showed a 82 bp miniature inverted-repeat terminal element (MITE) (Stowaway) insertion, which was also detected in the Triticeae diploid species Australopyrum species (W genome) and Taeniatherum caput-medusae (Ta genome). Maximum parsimony and Bayesian analysis suggested that diploid Hordeum brachyantherum subsp. californicum is one ancestor of polyploids Hordeum arizonicum, H. brachyantherum subsp. brachyantherum, Hordeum depressum, and Hordeum procerum. The other ancestor of tetraploid H. depressum is probably Hordeum euclaston. Hordeum cordobense was suggested to be one of the genome donors to hexaploid H. procerum. The diploid Hordeum flexuosum and tetraploid H. tetraploidum were suggested as the parents to hexaploid species Hordeum parodii. The result is that one sequence from each of three Hordeum tetrapolyploids, including H. fuegianum, H. jubatum, and H. tetraploidum, and one from Hordeum hexaploid H. arizonicum fall outside the Hordeum clade of the DMC1 phylogenetic tree, therefore representing another example of complex evolutionary history. Our data may shed light on future phylogenetic studies in Triticeae, especially for the polyploids, by broadening the scope of investigations through sampling more genome types in Poaceae, not only from the tribe Triticeae. Résumé : La phylogénie d'espèces diploïdes, au sein du genre Hordeum, a été étudiée intensivement. Bien que l'origine des espèces polyploïdes d'Amérique ait été analysée en utilisant les séquences de l'espaceur interne transcrit en copies multiples, les origines des espèces d' Hordeum demeurent floues. Cette étude a pour objectifs d'élucider les origines d'espèces polyploïdes d'Amérique et d'explorer les relations phylogénétiques entre ces polyploïdes les Hordeum diploïdes ainsi que d'autres espèces diploïdes chez les Triticeae, en utilisant un gène nucléaire en simple copie, le cADN1 méiotique perturbé (C1MP). Les séquences C1MP provenant de neuf espèces d'Hordeum polyploïdes ont été analysées. Les comparaisons de séquence ont révélé qu'une copie des séquences provenant des espèces polyploïdes H. fuegianum, H. jubatum, et H. tetraploidum montrait l'insertion d'un élément terminal inversé-répété miniature (ETMI) (stowaway) de 82 pb, lequel a aussi été détecté chez les espèces de Triticeae diploïdes Australopy...

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“…Molecular phylogenetic analyses of Hordeum species based on nucleotide sequences have been carried out using various nuclear or chloroplast DNA sequences. The former involve nucleotide sequences from nuclear genes of translation elongation factor-G (EF-G; Komatsuda et al 1999Komatsuda et al , 2001Komatsuda et al , 2009, antifungal chitinase (Bustos et al 2002), disrupted meiotic cDNA 1 (DMC1; Petersen and Seberg 2003), RNA polymerase II (RPB2; Sun et al 2009), and the rDNA internal transcribed spacer region (ITS; Bustos et al 2002, Blattner 2004. The chloroplast DNA sequences analyzed to date involve SSR regions (Provan et al 1999), the rpoA gene (Petersen and Seberg 2003), the matK, atpB-rbcL and trnL-trnF regions (Nishikawa et al 2002), and the trnL-trnF region (Jakob and Blattner 2006).…”

Section: Introductionmentioning

confidence: 99%

Molecular phylogeny of the genus Hordeum using thioredoxin-like gene sequences

2009

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Phylogenetic relationships within the genus Hordeum were investigated based on nucleotide sequences of the thioredoxin-like (HTL) gene. We analyzed amplified genomic DNA fragments of the HTL gene from 11 Hordeum species including 16 taxa (25 accessions), which cover mainly diploid accessions together with several tetraploid accessions. Phylogenetic analysis based on the HTL sequences demonstrated a clear divergence of the four basic genomes I (H. vulgare and H. bulbosum), Xa (H. marinum), Xu (H. murinum) and H (other species) in the genus. Phylogenetic clustering also led us to infer two separate clades, one containing the I and Xu, and the other containing the Xa and H genomes. In the diploid H-genome species, American species were confirmed to be closely related and divergent from Asian species. Analysis of the Xa-genome group suggested an alloploid origin of tetraploid H. marinum ssp. gussoneanum by hybridization between the diploid cytotypes of ssp. marinum and ssp. gussoneanum. Our data also supported the hypothesis that two tetraploid cytotypes of H. murinum (ssp. murinum and ssp. leporinum) have an alloploid origin, where one genome was presumably derived from the diploid cytotype ssp. glaucum and the other from an unknown Xugenome species.

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Evolutionary process of Hordeum brachyantherum 6x and related tetraploid species revealed by nuclear DNA sequences

Cited by 15 publications

References 27 publications

Progress in phylogenetic analysis and a new infrageneric classification of the barley genus Hordeum (Poaceae: Triticeae)

Progress in phylogenetic analysis and a new infrageneric classification of the barley genus Hordeum (Poaceae: Triticeae)

Molecular phylogeny and reticulate origins of several American polyploid Hordeum species

Molecular phylogeny of the genus Hordeum using thioredoxin-like gene sequences

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