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https://www.readbyqxmd.com/read/29322395/lead-zinc-and-cadmium-uptake-accumulation-and-phytoremediation-by-plants-growing-around-tang-e-douzan-lead-zinc-mine-iran
#1
Reza Hesami, Azam Salimi, Seyed Majid Ghaderian
In the current study, soils of Tang-e Douzan mine, located in Isfahan, Iran, were collected and analyzed for soluble, exchangeable, and total amounts of Pb, Zn, Cd, Ca, and Mg. The maximum Pb, Zn, Cd, Ca, and Mg concentrations in soils were 2500, 1100, 59, 43,800, and 1320 mg/kg for total metals, 86, 83, 6.3, 4650, and 48 mg/kg for their exchangeable fractions, and 59, 3.7, 0.53, 430, and 6.4 mg/kg for their soluble fractions, respectively. All specimens collected, including 69 plant species, were analyzed for Pb, Zn, and Cd...
January 10, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29298834/genomic-imprinting-was-evolutionarily-conserved-during-wheat-polyploidization
#2
Guanghui Yang, Zhenshan Liu, Lulu Gao, Kuohai Yu, Man Feng, Yingyin Yao, Huiru Peng, Zhaorong Hu, Qixin Sun, Zhongfu Ni, Mingming Xin
Genomic imprinting is an epigenetic phenomenon that causes genes to be differentially expressed depending on their parent-of-origin. To evaluate the evolutionary conservation of genomic imprinting and the effects of ploidy on this process, we investigated parent-of-origin-specific gene expression patterns in the endosperm of diploid (Aegilops spp.), tetraploid, and hexaploid wheat (Triticum spp.) at various stages of development via high-throughput transcriptome sequencing. We identified 91, 135, and 146 maternally or paternally expressed genes (MEGs or PEGs, respectively) in diploid, tetraploid, and hexaploid wheat, respectively, 52...
January 3, 2018: Plant Cell
https://www.readbyqxmd.com/read/29297308/dep1-gene-in-wheat-species-with-normal-compactoid-and-compact-spikes
#3
Valeriya Vavilova, Irina Konopatskaia, Anastasia E Kuznetsova, Alexandr Blinov, Nikolay P Goncharov
BACKGROUND: In rice, a variant of DEP1 gene results in erect panicle architecture, well-developed vascular bundles, an increase in the number of grains per panicle and a consequent increase in the grain yield. Interestingly, DEP1 homologs are present in the other cereals including species of wheat and barley (Hordeum vulgare), even though they do not produce panicles but spikes. In barley, HvDEP1 alleles do not differ between strains of various ear types and geographic origins, while in at least three OsDEP1 variants have been described...
December 28, 2017: BMC Genetics
https://www.readbyqxmd.com/read/29258257/aetmyc1-the-candidate-gene-controlling-the-red-coleoptile-trait-in-aegilops-tauschii-coss-accession-as77
#4
Dong Cao, Guangji Ye, Yuan Zong, Bo Zhang, Wenjie Chen, Baolong Liu, Huaigang Zhang
The red coleoptile trait can help monocotyledonous plants withstand stresses, and key genes responsible for the trait have been isolated from Triticum aestivum, Triticum urartu, and Triticum monococcum, but no corresponding research has been reported for Aegilops tauschii. In this research, transcriptome analysis was performed to isolate the candidate gene controlling the white coleoptile trait in Ae. tauschii. There were 5348 upregulated, differentially-expressed genes (DEGs) and 4761 downregulated DEGs in red coleoptile vs...
December 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29232688/genotype-and-cell-specific-dynamics-of-tandem-repeat-patterns-in-aegilops-speltoides-tausch-poaceae-triticeae
#5
Olga Raskina
In wild plant populations, chromosome rearrangements lead to the wide intraspecific polymorphisms in the abundance and patterns of highly repetitive DNA. However, despite the large amount of accumulated data, the impact of the complex repetitive DNA fraction on genome reorganization and functioning and the mechanisms balancing and maintaining the structural integrity of the genome are not fully understood. Homologous recombination is thought to play a key role in both genome reshuffling and stabilization, while the contribution of nonhomologous recombination seems to be undervalued...
December 13, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/29220383/characterization-of-the-cct-family-and-analysis-of-gene-expression-in-aegilops-tauschii
#6
Xingwei Zheng, Xiaohua Li, Chuan Ge, Jianzhong Chang, Mengmeng Shi, Jianli Chen, Linyi Qiao, Zhijian Chang, Jun Zheng, Jiancheng Zhang
Flowering is crucial for reproductive success in flowering plant. The CCT domain-containing genes widely participate in the regulation of flowering process in various plant species. So far, the CCT family in common wheat is largely unknown. Here, we characterized the structure, organization, molecular evolution and expression of the CCT genes in Aegilops tauschii, which is the D genome donor of hexaploid wheat. Twenty-six CCT genes (AetCCT) were identified from the full genome of A. tauschii and these genes were distributed on all 7 chromosomes...
2017: PloS One
https://www.readbyqxmd.com/read/29216443/genetic-classification-of-i-aegilops-columnaris-i-zhuk-2n-4x-28-u-sup-c-sup-u-sup-c-sup-x-sup-c-sup-x-sup-c-sup-chromosomes-based-on-fish-analysis-and-substitution-patterns-in-common-wheat-x-i-ae-columnaris-i-introgressive-lines
#7
Ekaterina D Badaeva, Alevtina S Ruban, Alexandra A Shishkina, Sergei N Sibikeev, Alexander E Druzhin, Sergei A Surzhikov, Alexandra Yu Dragovich
<i>Aegilops columnaris</i> is tetraploid <i>Aegilops</i> species originated from <i>Ae. umbellulata </i>(2n=2x=14, UU) and yet unknown diploid grass species. Although <i>Ae. columnaris </i>possesses some agronomically valuable traits, such as heat and drought tolerance, resistance to pests, it has never been used in wheat breeding due to difficulties of hybrid production and lack of information on the relationships between <i>Ae. columnaris </i>and common wheat chromosomes...
December 7, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29216335/introgression-of-aegilops-speltoides-segments-in-triticum-aestivum-and-the-effect-of-the-gametocidal-genes
#8
Julie King, Surbhi Grewal, Cai-Yun Yang, Stella Hubbart Edwards, Duncan Scholefield, Stephen Ashling, John A Harper, Alexandra M Allen, Keith J Edwards, Amanda J Burridge, Ian P King
Background and Aims: Bread wheat (Triticum aestivum) has been through a severe genetic bottleneck as a result of its evolution and domestication. It is therefore essential that new sources of genetic variation are generated and utilized. This study aimed to generate genome-wide introgressed segments from Aegilops speltoides. Introgressions generated from this research will be made available for phenotypic analysis. Methods: Aegilops speltoides was crossed as the male parent to T...
December 5, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29201982/dataset-of-the-hox1-gene-sequences-of-the-wheat-polyploids-and-their-diploid-relatives
#9
Andrey B Shcherban, Elena A Salina
The TaHOX-1 gene of common wheat Triticum aestivum L. (BAD-genome) encodes transcription factor (HD-Zip I) which is characterized by the presence of a DNA-binding homeodomain (HD) with an adjacent Leucine zipper (LZ) motif. This gene can play a role in adapting plant to a variety of abiotic stresses, such as drought, cold, salinity etc., which strongly affect wheat production. However, it's both functional role in stress resistance and divergence during wheat evolution has not yet been elucidated. This data in brief article is associated with the research paper "Structural and functional divergence of homoeologous copies of the TaHOX-1 gene in polyploid wheats and their diploid ancestors"...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29196985/virus-induced-gene-silencing-vigs-in-aegilops-tauschii-and-its-use-in-functional-analysis-of-aetdreb2
#10
Elahe Tavakol
Among the available reverse genetic approaches for studying gene function, virus-induced gene silencing (VIGS) has several advantages. It allows rapid characterization of gene function independent of stable transformation, which is basically difficult to achieve in monocots, and offers the potential to silence individual or multiple genes of a gene family. In order to establish a VIGS system in Aegilops tauschii, modified vectors derived from Barley stripe mosaic virus (BSMV) were used for silencing a phytoene desaturase gene that provides a convenient visual reporter for silencing...
December 1, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/29167543/the-role-of-reproductive-isolation-in-allopolyploid-speciation-patterns-empirical-insights-from-the-progenitors-of-common-wheat
#11
Yoshihiro Matsuoka, Shigeo Takumi
The ability to cause reproductive isolation often varies among individuals within a plant species. We addressed whether such polymorphism influenced speciation of the allopolyploid common wheat (Triticum aestivum L., AABBDD genome) by evaluating the expression of pre-pollination (outcrossing potential) and post-pollination (crossability) barriers in Aegilops tauschii Coss. (the D genome progenitor). In total, 201 Ae. tauschii accessions representing the entire natural habitat range of the species were used for anther length measurement and artificial crosses with a Triticum turgidum L...
November 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29164313/genome-wide-analysis-of-a-recently-active-retrotransposon-au-sine-in-wheat-content-distribution-within-subgenomes-and-chromosomes-and-gene-associations
#12
Danielle Keidar, Chen Doron, Khalil Kashkush
Here, we show that Au SINE elements have strong associations with protein-coding genes in wheat. Most importantly Au SINE insertion within introns causes allelic variation and might induce intron retention. The impact of transposable elements (TEs) on genome structure and function is intensively studied in eukaryotes, especially in plants where TEs can reach up to 90% of the genome in some cases, such as in wheat. Here, we have performed a genome-wide in-silico analysis using the updated publicly available genome draft of bread wheat (T...
November 21, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/29158546/the-aegilops-tauschii-genome-reveals-multiple-impacts-of-transposons
#13
Guangyao Zhao, Cheng Zou, Kui Li, Kai Wang, Tianbao Li, Lifeng Gao, Xiaoxia Zhang, Hongjin Wang, Zujun Yang, Xu Liu, Wenkai Jiang, Long Mao, Xiuying Kong, Yuannian Jiao, Jizeng Jia
Wheat is an important global crop with an extremely large and complex genome that contains more transposable elements (TEs) than any other known crop species. Here, we generated a chromosome-scale, high-quality reference genome of Aegilops tauschii, the donor of the wheat D genome, in which 92.5% sequences have been anchored to chromosomes. Using this assembly, we accurately characterized genic loci, gene expression, pseudogenes, methylation, recombination ratios, microRNAs and especially TEs on chromosomes...
November 20, 2017: Nature Plants
https://www.readbyqxmd.com/read/29143815/genome-sequence-of-the-progenitor-of-the-wheat-d-genome-aegilops-tauschii
#14
Ming-Cheng Luo, Yong Q Gu, Daniela Puiu, Hao Wang, Sven O Twardziok, Karin R Deal, Naxin Huo, Tingting Zhu, Le Wang, Yi Wang, Patrick E McGuire, Shuyang Liu, Hai Long, Ramesh K Ramasamy, Juan C Rodriguez, Sonny L Van, Luxia Yuan, Zhenzhong Wang, Zhiqiang Xia, Lichan Xiao, Olin D Anderson, Shuhong Ouyang, Yong Liang, Aleksey V Zimin, Geo Pertea, Peng Qi, Jeffrey L Bennetzen, Xiongtao Dai, Matthew W Dawson, Hans-Georg Müller, Karl Kugler, Lorena Rivarola-Duarte, Manuel Spannagl, Klaus F X Mayer, Fu-Hao Lu, Michael W Bevan, Philippe Leroy, Pingchuan Li, Frank M You, Qixin Sun, Zhiyong Liu, Eric Lyons, Thomas Wicker, Steven L Salzberg, Katrien M Devos, Jan Dvořák
Aegilops tauschii is the diploid progenitor of the D genome of hexaploid wheat (Triticum aestivum, genomes AABBDD) and an important genetic resource for wheat. The large size and highly repetitive nature of the Ae. tauschii genome has until now precluded the development of a reference-quality genome sequence. Here we use an array of advanced technologies, including ordered-clone genome sequencing, whole-genome shotgun sequencing, and BioNano optical genome mapping, to generate a reference-quality genome sequence for Ae...
November 23, 2017: Nature
https://www.readbyqxmd.com/read/29125785/cytogenetic-analysis-and-mapping-of-leaf-rust-resistance-in-aegilops-speltoides-tausch-derived-bread-wheat-line-selection2427-carrying-putative-gametocidal-gene-s
#15
M Niranjana, Vinod, J B Sharma, Niharika Mallick, S M S Tomar, S K Jha
Leaf rust (Puccinia triticina) is a major biotic stress affecting wheat yields worldwide. Host-plant resistance is the best method for controlling leaf rust. Aegilops speltoides is a good source of resistance against wheat rusts. To date, five Lr genes, Lr28, Lr35, Lr36, Lr47, and Lr51, have been transferred from Ae. speltoides to bread wheat. In Selection2427, a bread wheat introgresed line with Ae. speltoides as the donor parent, a dominant gene for leaf rust resistance was mapped to the long arm of chromosome 3B (LrS2427)...
August 25, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29116063/-myc-gene-family-in-cereals-transformations-during-evolution-of-hexaploid-bread-wheat-and-its-relatives
#16
K V Strygina, E K Khlestkina
The transcription factors of the MYC gene family are an integral part of the MYB + MYC + WD40 regulatory complex required to activate the genes of plant flavonoid biosynthesis. The TaMyc1 gene, which controls the synthesis of flavonoid pigments in the grain pericarp, is known in bread wheat (Triticum aestivum L., BBAADD genome, 2n = 6x = 42). In the present work, we identified 10 copies of this gene in the T. aestivum genome, 22 copies in the nearest bread wheat relatives (T. durum, T. urartu, T. monococcum, Aegilops speltoides, Ae...
September 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/29104581/a-high-density-genetic-map-of-wild-emmer-wheat-from-the-karaca-da%C3%A4-region-provides-new-evidence-on-the-structure-and-evolution-of-wheat-chromosomes
#17
Chad Jorgensen, Ming-Cheng Luo, Ramesh Ramasamy, Mathew Dawson, Bikram S Gill, Abraham B Korol, Assaf Distelfeld, Jan Dvorak
Wild emmer (Triticum turgidum ssp. dicoccoides) is a progenitor of all cultivated wheat grown today. It has been hypothesized that emmer was domesticated in the Karaca Dağ region in southeastern Turkey. A total of 445 recombinant inbred lines of T. turgidum ssp. durum cv. 'Langdon' x wild emmer accession PI 428082 from this region was developed and genotyped with the Illumina 90K single nucleotide polymorphism Infinium assay. A genetic map comprising 2,650 segregating markers was constructed. The order of the segregating markers and an additional 8,264 co-segregating markers in the Aegilops tauschii reference genome sequence was used to compare synteny of the tetraploid wheat with the Brachypodium distachyon, rice, and sorghum...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29101627/genetic-mapping-reveals-a-dominant-awn-inhibiting-gene-related-to-differentiation-of-the-variety-anathera-in-the-wild-diploid-wheat-aegilops-tauschii
#18
Ryo Nishijima, Tatsuya M Ikeda, Shigeo Takumi
Aegilops tauschii, a wild wheat relative, is the D-genome donor of common wheat. Subspecies and varieties of Ae. tauschii are traditionally classified based on differences in their inflorescence architecture. However, the genetic information for their diversification has been quite limited in the wild wheat relatives. The variety anathera has no awn on the lemma, but the genetic basis for this diagnostic character is unknown. Wide variations in awn length traits at the top and middle spikes were found in the Ae...
November 3, 2017: Genetica
https://www.readbyqxmd.com/read/29099990/transfer-of-a-starch-phenotype-from-wild-wheat-to-bread-wheat-by-deletion-of-a-locus-controlling-b-type-starch-granule-content
#19
Tansy Chia, Nikolai M Adamski, Benedetta Saccomanno, Andy Greenland, Alastair Nash, Cristobal Uauy, Kay Trafford
Our previous genetic analysis of a tetraploid wild wheat species, Aegilops peregrina, predicted that a single gene per haploid genome, Bgc-1, controls B-type starch granule content in the grain. To test whether bread wheat (Triticum aestivum L.) has orthologous Bgc-1 loci, we screened a population of γ-irradiated bread wheat cv. Paragon for deletions of the group 4 chromosomes spanning Bgc-1. Suitable deletions, each encompassing ~600-700 genes, were discovered for chromosomes 4A and 4D. These two deletions are predicted to have 240 homoeologous genes in common...
November 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29094182/molecular-cytogenetic-and-genomic-analyses-reveal-new-insights-into-the-origin-of-the-wheat-b-genome
#20
Wei Zhang, Mingyi Zhang, Xianwen Zhu, Yaping Cao, Qing Sun, Guojia Ma, Shiaoman Chao, Changhui Yan, Steven S Xu, Xiwen Cai
This work pinpointed the goatgrass chromosomal segment in the wheat B genome using modern cytogenetic and genomic technologies, and provided novel insights into the origin of the wheat B genome. Wheat is a typical allopolyploid with three homoeologous subgenomes (A, B, and D). The donors of the subgenomes A and D had been identified, but not for the subgenome B. The goatgrass Aegilops speltoides (genome SS) has been controversially considered a possible candidate for the donor of the wheat B genome. However, the relationship of the Ae...
November 1, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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