Molecular phylogeny of the genus Triticum L

Golovnina, Kseniya; Glushkov, S. A.; Блинов, А. Г.; Mayorov, Vladimir; Adkison, Linda R.; Гончаров, Н. П.

doi:10.1007/s00606-006-0478-x

Cited by 75 publications

(56 citation statements)

References 70 publications

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“…Interestingly, T. monococcum and T. boeticum are grouped together. The results were basically consistent with traditional plant morphotaxonomy (Golovnina et al 2007). …”

Section: Discussionsupporting

confidence: 89%

“…Four basic genomes defined as A, B, D and G contribute to the genomic make up of all Triticum species (Kihara 1924;Lilienfeld and Kihara 1934). Intergenic hybridization and allopolyploidy involving the most closely related genus Aegilops L. have been crucial for the speciation and adaptation of wheat Triticum L. (Golovnina et al 2007.) Species identification at the DNA level contributes to accurate species discrimination and can tackle the limitations of traditional taxonomy that is based purely on morphological characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Application of the ITS2 region for barcoding plants of the genus Triticum L. and Aegilops L.

Ganopoulos

Kapazoglou

Bosmali

et al. 2017

Cereal Research Communications

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Molecular taxonomic studies have been performed in the past in order to identify different wheat species and construct a molecular phylogeny. These were based on universal but sufficiently divergent sequences from both the nuclear and chloroplastic genomes of wheat. They included two short plastid sequences from the plastid genes rbcL and matK which have been proposed as the core "barcode" sequences by the "barcoding" guidelines for general plant identification. Historically, in molecular plant taxonomy, plastidic sequences had been favored over nuclear sequences, due to their uniparental inheritance and consequently lower intra-molecular recombination. However recently, the short nuclear sequence from the internal transcribed spacer 2 (ITS2) has been used successfully for the accurate identification of many medicinal and other plant species. Herein, we have used the plastidic matK, rbcL trnL, and the nuclear ITS2 region for the identification of different wheat species of Triticum L. and goatgrass species of Aegilops L. We have successfully discriminated all species that were examined from both genera, thus, validating the ITS2 region as a 'barcode tool' for accurate distinction of plants in the genus Triticum L. and Aegilops L. The success rate of PCR amplification and sequencing of the ITS2 region was 100%. We report also that matK, rbcL and trnL regions could not discriminate all species in contrast to the ITS2 region which demonstrated full discriminatory capacity.

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“…Interestingly, T. monococcum and T. boeticum are grouped together. The results were basically consistent with traditional plant morphotaxonomy (Golovnina et al 2007). …”

Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Application of the ITS2 region for barcoding plants of the genus Triticum L. and Aegilops L.

Ganopoulos

Kapazoglou

Bosmali

et al. 2017

Cereal Research Communications

View full text Add to dashboard Cite

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“…The collection that was analyzed includes all the known species of the genus Triticum based on the most commonly accepted taxonomic and phylogenetic classification for wheat (Feldman, 2001;Golovnina et al, 2007). Moreover, to assess the variation within each species, a comprehensive sampling and analysis of different accessions of each species was performed, each of which corresponded to a distinct geographical locale or country of origin (http://data.jic.bbsrc.ac.uk/cgi-bin/germplasm/triticeae/).…”

Section: Changes In Grain Size and Shape Through Domestication And Brmentioning

confidence: 99%

A Genetic Framework for Grain Size and Shape Variation in Wheat

et al. 2010

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Grain morphology in wheat (Triticum aestivum) has been selected and manipulated even in very early agrarian societies and remains a major breeding target. We undertook a large-scale quantitative analysis to determine the genetic basis of the phenotypic diversity in wheat grain morphology. A high-throughput method was used to capture grain size and shape variation in multiple mapping populations, elite varieties, and a broad collection of ancestral wheat species. This analysis reveals that grain size and shape are largely independent traits in both primitive wheat and in modern varieties. This phenotypic structure was retained across the mapping populations studied, suggesting that these traits are under the control of a limited number of discrete genetic components. We identified the underlying genes as quantitative trait loci that are distinct for grain size and shape and are largely shared between the different mapping populations. Moreover, our results show a significant reduction of phenotypic variation in grain shape in the modern germplasm pool compared with the ancestral wheat species, probably as a result of a relatively recent bottleneck. Therefore, this study provides the genetic underpinnings of an emerging phenotypic model where wheat domestication has transformed a long thin primitive grain to a wider and shorter modern grain.

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“…While it is known that the inheritance of cytoplasmic genomes is not universally maternal (Birky 1995, Korpelainen 2004, the phylogenetic tree developed in this study showed strictly maternal plastid inheritance in all of the included artificial species (Golovnina et al 2007). Moreover, based on our results, it is proposed that one Ae.…”

Section: Chloroplast Data Setsmentioning

confidence: 48%

“…The high degree of intra-specific variation observed among Ae. speltoides accessions, support this hypothesis (Golovnina et al 2007, Killian et al 2007). All diploid wheats can be robustly delineated from Aegilops species, Clades III and IV, but stay closely related to each other (Fig.…”

Section: Chloroplast Data Setsmentioning

confidence: 69%

Taxonomy and molecular phylogeny of natural and artificial wheat species

2009

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The effective use of wheat biodiversity in breeding programs is dependent on a sound conservation strategy for sources of biodiversity, and on appropriate techniques of incorporation into modern cultivars. Producing artificial wheat amphiploids using genomes of related species is an effective way to increase the available gene pool. However, artificial amphiploids should be given botanic names and positions within genus Triticum classification to ensure effective collection and preservation in gene banks. In this review, an attempt to integrate the results of molecular-genetic analyses of natural and artificial wheats with their taxonomy has been made. The correspondence of earlier evolutionary and taxonomic specifications to phylogenetic relationships within Triticum has been estimated using chloroplast and nuclear DNA sequence data. The results indicated close relationships between all artificial and natural species. Based on the data, all wild and cultivated diploid wheat species were united in a separate section, Monococcon. Different variants of nuclear Acc-1, Pgk-1, and Vrn-1 genes have been detected in diploid A genome species. Detailed analysis of the genes showed that one of these variants was a progenitor for all A genomes of polyploid wheats except for that in Triticum zhukovskyi and some of the artificial amphiploids.

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Molecular phylogeny of the genus Triticum L

Cited by 75 publications

References 70 publications

Application of the ITS2 region for barcoding plants of the genus Triticum L. and Aegilops L.

Application of the ITS2 region for barcoding plants of the genus Triticum L. and Aegilops L.

A Genetic Framework for Grain Size and Shape Variation in Wheat

Taxonomy and molecular phylogeny of natural and artificial wheat species

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