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https://www.readbyqxmd.com/read/27924119/differential-accumulation-of-cadmium-in-near-isogenic-lines-of-durum-wheat-no-role-for-phytochelatins
#1
Sheila M Macfie, Shirin Bahrami, Brian D McGarvey
Certain cultivars of some crops, including durum wheat (Triticum durum Desf.), have a propensity to accumulate cadmium in the grain. In the 1980s, a Canadian wheat breeding program generated five pairs of near-isogenic lines of durum wheat that vary in cadmium-accumulation. Within each pair, one member accumulates twofold to threefold higher concentrations of cadmium in the shoot and grain. However, the physiological explanation for the high-low phenotype is unknown. We studied correlations between concentrations of cadmium and non-protein thiols, including phytochelatins, in these five pairs of near-isogenic lines to test the hypothesis that differential retention of cadmium-binding complexes in the root would explain the phenotype...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27918628/phenotypic-and-genome-wide-association-analysis-of-spike-ethylene-in-diverse-wheat-genotypes-under-heat-stress
#2
Ravi Valluru, Matthew P Reynolds, William J Davies, Sivakumar Sukumaran
The gaseous phytohormone ethylene plays an important role in spike development in wheat (Triticum aestivum). However, the genotypic variation and the genomic regions governing spike ethylene (SET) production in wheat under long-term heat stress remain unexplored. We investigated genotypic variation in the production of SET and its relationship with spike dry weight (SDW) in 130 diverse wheat elite lines and landraces under heat-stressed field conditions. We employed an Illumina iSelect 90K single nucleotide polymorphism (SNP) genotyping array to identify the genetic loci for SET and SDW through a genome-wide association study (GWAS) in a subset of the Wheat Association Mapping Initiative (WAMI) panel...
December 5, 2016: New Phytologist
https://www.readbyqxmd.com/read/27917571/comparative-germination-responses-to-water-potential-across-different-populations-of-aegilops-geniculata-and-cultivar-varieties-of-triticum-durum-and-t-aestivum
#3
Simone Orsenigo, Filippo Guzzon, Thomas Abeli, Graziano Rossi, Ilda Vagge, Alma Balestrazzi, Andrea Mondoni, Jonas V Müller
Crop Wild Relatives (CWRs) are often used to improve crop quality and yields, because they contain genetically important traits that can contribute to stress resistance and adaptation. Here, seed germination of different populations of Aegilops geniculata Roth collected along a latitudinal gradient was studied under different drought stress in order to find populations suitable for improving drought tolerance in wheat. Different accessions of Aegilops neglecta Req. ex Bertol., Triticum aestivum L. and T. durum Desf...
December 5, 2016: Plant Biology
https://www.readbyqxmd.com/read/27914208/effect-of-rhizobacterial-consortia-from-undisturbed-arid-and-agro-ecosystems-on-wheat-growth-under-differing-conditions
#4
N G Inostroza, P J Barra, L Y Wick, M L Mora, M A Jorquera
Plant-growth promoting rhizobacteria (PGPR) are studied as complements/alternatives to chemical fertilization in agriculture. Poor information however, exists on the potential of PGPR from undisturbed ecosystems. Here, we evaluated the plant growth-promoting (PGP) effect of rhizobacterial consortia from undisturbed Chilean arid-ecosystems (Consortium C1) and agro-ecosystems (Consortium C2) on plant biomass production. The PGP effects of C1 and C2 were assayed in wheat seedlings (Triticum aestivum L.) grown in pots under growth chamber conditions and in pots placed in an open greenhouse under natural conditions, using two different Chilean Andisols (Piedras Negras and Freire series) kept either at 30% or 60% of their maximum water holding capacity (MWHC)...
December 3, 2016: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/27913833/tight-repulsion-linkage-between-sr36-and-sr39-was-revealed-by-genetic-cytogenetic-and-molecular-analyses
#5
Bosco Chemayek, Urmil K Bansal, Naeela Qureshi, Peng Zhang, William W Wagoire, Harbans S Bariana
The shortening of Aegilops speltoides segment did not facilitate recombination between stem rust resistance genes Sr36 and Sr39 . Robustness of marker rwgs28 for marker-assisted selection of Sr39 was demonstrated. Stem rust resistance genes Sr39 and Sr36 were transferred from Aegilops speltoides and Triticum timopheevii, respectively, to chromosome 2B of wheat. Genetic stocks RL6082 and RWG1 carrying Sr39 on a large and a shortened Ae. speltoides segments, respectively, and the Sr36-carrying Australian wheat cultivar Cook were used in this study...
December 2, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27904399/identification-of-alleles-of-puroindoline-genes-and-their-effect-on-wheat-triticum-aestivum-l-grain-texture
#6
Mária Presinszká, Klára Štiasna, Tomáš Vyhnánek, Václav Trojan, Eva Mrkvicová, Luděk Hřivna, Ladislav Havel
Grain hardness is one of the most important quality characteristics of wheat (Triticum aestivum L.). It is a significant property of wheat grains and relates to milling quality and end product quality. Grain hardness is caused by the presence of puroindoline genes (Pina and Pinb). A collection of 25 genotypes of wheat with unusual grain colour (blue aleurone, purple and white pericarp, yellow endosperm) was studied by polymerase chain reaction (PCR) for the diversity within Pina and Pinb (alleles: Pina-D1a, Pina-D1b, Pinb-D1a, Pinb- -D1b, Pinb-D1c and Pinb-D1d)...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27900504/a-large-scale-chromosome-specific-snp-discovery-guideline
#7
Bala Ani Akpinar, Stuart Lucas, Hikmet Budak
Single-nucleotide polymorphisms (SNPs) are the most prevalent type of variation in genomes that are increasingly being used as molecular markers in diversity analyses, mapping and cloning of genes, and germplasm characterization. However, only a few studies reported large-scale SNP discovery in Aegilops tauschii, restricting their potential use as markers for the low-polymorphic D genome. Here, we report 68,592 SNPs found on the gene-related sequences of the 5D chromosome of Ae. tauschii genotype MvGB589 using genomic and transcriptomic sequences from seven Ae...
November 29, 2016: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/27900400/homoeologous-recombination-based-transfer-and-molecular-cytogenetic-mapping-of-a-wheat-streak-mosaic-virus-and-triticum-mosaic-virus-resistance-gene-wsm3-from-thinopyrum-intermedium-to-wheat
#8
Tatiana V Danilova, Guorong Zhang, Wenxuan Liu, Bernd Friebe, Bikram S Gill
Here, we report the production of a wheat- Thinopyrum intermedium recombinant stock conferring resistance to wheat streak mosaic virus and Triticum mosaic virus. Wheat streak mosaic caused by the wheat streak mosaic virus (WSMV) is an important disease of bread wheat (Triticum aestivum) worldwide. To date, only three genes conferring resistance to WSMV have been named and two, Wsm1 and Wsm3, were derived from the distantly related wild relative Thinopyrum intermedium. Wsm3 is only available in the form of a compensating wheat-Th...
November 29, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27899932/a-wheat-cinnamyl-alcohol-dehydrogenase-tacad12-contributes-to-host-resistance-to-the-sharp-eyespot-disease
#9
Wei Rong, Meiying Luo, Tianlei Shan, Xuening Wei, Lipu Du, Huijun Xu, Zengyan Zhang
Sharp eyespot, caused mainly by the necrotrophic fungus Rhizoctonia cerealis, is a destructive disease in hexaploid wheat (Triticum aestivum L.). In Arabidopsis, certain cinnamyl alcohol dehydrogenases (CADs) have been implicated in monolignol biosynthesis and in defense response to bacterial pathogen infection. However, little is known about CADs in wheat defense responses to necrotrophic or soil-borne pathogens. In this study, we isolate a wheat CAD gene TaCAD12 in response to R. cerealis infection through microarray-based comparative transcriptomics, and study the enzyme activity and defense role of TaCAD12 in wheat...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27899926/bioinformatic-analyses-of-subgroup-a-members-of-the-wheat-bzip-transcription-factor-family-and-functional-identification-of-tabzip174-involved-in-drought-stress-response
#10
Xueyin Li, Biane Feng, Fengjie Zhang, Yimiao Tang, Liping Zhang, Lingjian Ma, Changping Zhao, Shiqing Gao
Extensive studies in Arabidopsis and rice have demonstrated that Subgroup-A members of the bZIP transcription factor family play important roles in plant responses to multiple abiotic stresses. Although common wheat (Triticum aestivum) is one of the most widely cultivated and consumed food crops in the world, there are limited investigations into Subgroup A of the bZIP family in wheat. In this study, we performed bioinformatic analyses of the 41 Subgroup-A members of the wheat bZIP family. Phylogenetic and conserved motif analyses showed that most of the Subgroup-A bZIP proteins involved in abiotic stress responses of wheat, Arabidopsis, and rice clustered in Clade A1 of the phylogenetic tree, and shared a majority of conserved motifs, suggesting the potential importance of Clade-A1 members in abiotic stress responses...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27894005/uplc-qtof-analysis-reveals-metabolomic-changes-in-the-flag-leaf-of-wheat-triticum-aestivum-l-under-low-nitrogen-stress
#11
Yang Zhang, Xin-Ming Ma, Xiao-Chun Wang, Ji-Hong Liu, Bing-Yan Huang, Xiao-Yang Guo, Shu-Ping Xiong, Gui-Xiao La
Wheat is one of the most important grain crop plants worldwide. Nitrogen (N) is an essential macronutrient for the growth and development of wheat and exerts a marked influence on its metabolites. To investigate the influence of low nitrogen stress on various metabolites of the flag leaf of wheat (Triticum aestivum L.), a metabolomic analysis of two wheat cultivars under different induced nitrogen levels was conducted during two important growth periods based on large-scale untargeted metabolomic analysis using ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF)...
November 18, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27889157/monitoring-of-wheat-lactic-acid-bacteria-from-the-field-until-the-first-step-of-dough-fermentation
#12
Antonio Alfonzo, Claudia Miceli, Anna Nasca, Elena Franciosi, Giusi Ventimiglia, Rosalia Di Gerlando, Kieran Tuohy, Nicola Francesca, Giancarlo Moschetti, Luca Settanni
The present work was carried out to retrieve the origin of lactic acid bacteria (LAB) in sourdough. To this purpose, wheat LAB were monitored from ear harvest until the first step of fermentation for sourdough development. The influence of the geographical area and variety on LAB species/strain composition was also determined. The ears of four Triticum durum varieties (Duilio, Iride, Saragolla and Simeto) were collected from several fields located within the Palermo province (Sicily, Italy) and microbiologically investigated...
April 2017: Food Microbiology
https://www.readbyqxmd.com/read/27887035/impact-of-transgene-genome-location-on-gene-migration-from-herbicide-resistant-wheat-triticum-aestivum-l-to-jointed-goatgrass-aegilops-cylindrica-host
#13
M Rehman, J L Hansen, C A Mallory-Smith, R S Zemetra
BACKGROUND: Wheat (Triticum aestivum) (ABD) and jointed goatgrass (Aegilops cylindrica) (CD) can cross and produce hybrids that can backcross to either parent. Such backcrosses can result in progeny with chromosomes and/or chromosome segments retained from wheat. Thus, a herbicide resistance gene could migrate from wheat to jointed goatgrass. In theory, the risk of gene migration from herbicide resistant-wheat to jointed goatgrass is more likely if the gene is located on the D-genome and less likely if the gene is located on A or B genome of wheat...
November 25, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27881987/microscopic-and-molecular-characterization-of-the-prehaustorial-resistance-against-wheat-leaf-rust-puccinia-triticina-in-einkorn-triticum-monococcum
#14
Albrecht Serfling, Sven E Templer, Peter Winter, Frank Ordon
Puccinia triticina f. sp. tritici (Eriks.), the causal agent of leaf rust, causes substantial yield losses in wheat production. In wheat many major leaf rust resistance genes have been overcome by virulent races. In contrast, the prehaustorial resistance (phr) against wheat leaf rust detected in the diploid wheat Einkorn (Triticum monoccocum var. monococcum) accession PI272560 confers race-independent resistance against isolates virulent on accessions harboring resistance genes located on the A-genome of Triticum aestivum...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27881898/chromosomal-localization-and-contribution-of-three-homoeologous-genes-to-biosynthesis-of-cytosolic-aspartate-aminotransferase-in-common-wheat
#15
Marcin Maciąga, Michał Szkop, Andrzej Paszkowski
Chromosomal localization of the three homoeologous genes encoding cytosolic aspartate aminotransferase in common wheat (Triticum aestivum cv. Chinese Spring, 2n = 6x = 42, AABBDD) was specified to: 3AL (0.42÷0.61), 3BL (0.38÷0.41) and 3DL (0.23÷0.81) by a comparative zymographic analysis of the enzymatic activities in deletion lines. It was also attempted to precisely explain the nature of the relationship between a number of genes encoding α and β subunits and a distribution of staining intensity of cytosolic aspartate aminotransferase allozyme activity bands using aneuploid lines of common wheat with modified third pair of homoeologous chromosomes from genomes A, B and D, on which the genes encoding subunit α (genome A) and β (genome B and D) are localized...
2016: Proceedings of the National Academy of Sciences, India. Section B
https://www.readbyqxmd.com/read/27872635/rhizosphere-organic-anions-play-a-minor-role-in-improving-crop-species-ability-to-take-up-residual-phosphorus-p-in-agricultural-soils-low-in-p-availability
#16
Yanliang Wang, Tore Krogstad, Jihong L Clarke, Moritz Hallama, Anne F Øgaard, Susanne Eich-Greatorex, Ellen Kandeler, Nicholas Clarke
Many arable lands have accumulated large reserves of residual phosphorus (P) and a relatively large proportion of soil P is less available for uptake by plants. Root released organic anions are widely documented as a key physiological strategy to enhance P availability, while limited information has been generated on the contribution of rhizosphere organic anions to P utilization by crops grown in agricultural soils that are low in available P and high in extractable Ca, Al, and Fe. We studied the role of rhizosphere organic anions in P uptake from residual P in four common crops Triticum aestivum, Avena sativa, Solanum tuberosum, and Brassica napus in low- and high-P availability agricultural soils from long-term fertilization field trials in a mini-rhizotron experiment with four replications...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27872629/qtl-analysis-of-spike-morphological-traits-and-plant-height-in-winter-wheat-triticum-aestivum-l-using-a-high-density-snp-and-ssr-based-linkage-map
#17
Huijie Zhai, Zhiyu Feng, Jiang Li, Xinye Liu, Shihe Xiao, Zhongfu Ni, Qixin Sun
Wheat yield can be enhanced by modifying the spike morphology and the plant height. In this study, a population of 191 F9 recombinant inbred lines (RILs) was developed from a cross between two winter cultivars Yumai 8679 and Jing 411. A dense genetic linkage map with 10,816 markers was constructed by incorporating single nucleotide polymorphism (SNP) and simple sequence repeat (SSR) marker information. Five spike morphological traits and plant height were evaluated under nine environments for the RILs and parental lines, and the number of detected environmentally stable QTLs were 18 and three, respectively...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27867152/transmitting-characters-of-individual-e-chromosomes-of-thinopyrum-elongatum-in-triticum-turgidum-background
#18
Li Haifeng, Liu Huiping, Dai Yi, Huang Shuai, Zhang Jun, Gao Yong, Chen Jianmin
The transmission patterns of Thinopyrum elongatum chromosomes in the background of Triticum turgidum were investigated through cytogenetic and molecular marker analysis based on the F2 and F3 plants derived from a cross between Triticum trititrigia (AABBEE) and T. turgidum L. ssp. durum (AABB). An additional objective was to develop durum-Th. elongatum E chromosome addition lines. Among 218 F2 plants, individuals with 2n=28 accounted for 41.7%, those with 2n=29 accounted for 18.3%, and the remaining 40.0% had 2n=31-42...
November 20, 2016: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/27866227/genome-wide-association-mapping-of-resistance-to-eyespot-disease-pseudocercosporella-herpotrichoides-in-european-winter-wheat-triticum-aestivum-l-and-fine-mapping-of-pch1
#19
Christine D Zanke, Bernd Rodemann, Jie Ling, Quddoos H Muqaddasi, Jörg Plieske, Andreas Polley, Sonja Kollers, Erhard Ebmeyer, Viktor Korzun, Odile Argillier, Gunther Stiewe, Thomas Zschäckel, Martin W Ganal, Marion S Röder
Genotypes with recombination events in the Triticum ventricosum introgression on chromosome 7D allowed to fine-map resistance gene Pch1, the main source of eyespot resistance in European winter wheat cultivars. Eyespot (also called Strawbreaker) is a common and serious fungal disease of winter wheat caused by the necrotrophic fungi Oculimacula yallundae and Oculimacula acuformis (former name Pseudocercosporella herpotrichoides). A genome-wide association study (GWAS) for eyespot was performed with 732 microsatellite markers (SSR) and 7761 mapped SNP markers derived from the 90 K iSELECT wheat array using a panel of 168 European winter wheat varieties as well as three spring wheat varieties and phenotypic evaluation of eyespot in field tests in three environments...
November 19, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27866225/characterization-of-a-common-wheat-triticum-aestivum-l-high-tillering-dwarf-mutant
#20
Tao Xu, Nengfei Bian, Mingxing Wen, Jin Xiao, Chunxia Yuan, Aizhong Cao, Shouzhong Zhang, Xiue Wang, Haiyan Wang
A novel high-tillering dwarf mutant in common wheat Wangshuibai was characterized and mapped to facilitate breeding for plant height and tiller and the future cloning of the causal gene. Tiller number and plant height are two major agronomic traits in cereal crops affecting plant architecture and grain yield. NAUH167, a mutant of common wheat landrace Wangshuibai induced by ethylmethyl sulfide (EMS) treatment, exhibits higher tiller number and reduced plant height. Microscope observation showed that the dwarf phenotype was attributed to the decrease in the number of cells and their length...
November 19, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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