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https://www.readbyqxmd.com/read/28490951/gene-introgression-from-common-wheat-into-aegilops-l
#1
Bo Yuan, Ximin Cao, Aizhi Lv
Group of experiments were carried out to verify possibility of gene introgression from common wheat into Aegilops. The artificial indoor crossbreed was conducted using 7 genotypes from 4 wheat relative species as female, and common wheat as male. The experiment result shows that different species has variable cross ability. Among the 4 Aegilops species, the highest cross rate is from the combination of Aegilops tauschii × Triticum aestivum (46.49% for genotype Ae42, 22.58% for Y92), the second is from Aegilops ovata × T...
May 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28463975/global-gene-expression-profiling-related-to-temperature-sensitive-growth-abnormalities-in-interspecific-crosses-between-tetraploid-wheat-and-aegilops-tauschii
#2
Ryusuke Matsuda, Julio Cesar Masaru Iehisa, Kouhei Sakaguchi, Ryoko Ohno, Kentaro Yoshida, Shigeo Takumi
Triploid wheat hybrids between tetraploid wheat and Aegilops tauschii sometimes show abnormal growth phenotypes, and the growth abnormalities inhibit generation of wheat synthetic hexaploids. In type II necrosis, one of the growth abnormalities, necrotic cell death accompanied by marked growth repression occurs only under low temperature conditions. At normal temperature, the type II necrosis lines show grass-clump dwarfism with no necrotic symptoms, excess tillers, severe dwarfism and delayed flowering. Here, we report comparative expression analyses to elucidate the molecular mechanisms of the temperature-dependent phenotypic plasticity in the triploid wheat hybrids...
2017: PloS One
https://www.readbyqxmd.com/read/28456843/dynamic-nucleolar-activity-in-wheat%C3%A2-%C3%A3-%C3%A2-aegilops-hybrids-evidence-of-c-genome-dominance
#3
Ghader Mirzaghaderi, Zinat Abdolmalaki, Mohsen Zohouri, Zeinab Moradi, Annaliese S Mason
NOR loci of C-subgenome are dominant in wheat × Aegilops interspecific hybrids, which may have evolutionary implications for wheat group genome dynamics and evolution. After interspecific hybridisation, some genes are often expressed from only one of the progenitor species, shaping subsequent allopolyploid genome evolution processes. A well-known example is nucleolar dominance, i.e. the formation of cell nucleoli from chromosomes of only one parental species. We studied nucleolar organizing regions (NORs) in diploid Aegilops markgrafii (syn: Ae...
April 29, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28428792/identification-of-candidate-genes-and-biosynthesis-pathways-related-to-fertility-conversion-by-wheat-ktm3315a-transcriptome-profiling
#4
Jiali Ye, Yang Duan, Gan Hu, Xingxia Geng, Gaoming Zhang, Pengjiao Yan, Zihan Liu, Lingli Zhang, Xiyue Song
The Aegilops kotschyi thermo-sensitive cytoplasmic male sterility (K-TCMS) system may facilitate hybrid wheat (Triticum aestivum L.) seed multiplication and production. The K-TCMS line is completely male sterile during the normal wheat-growing season, whereas its fertility can be restored in a high-temperature environment. To elucidate the molecular mechanisms responsible for male sterility/fertility conversion and candidate genes involved with pollen development in K-TCMS, we employed RNA-seq to sequence the transcriptomes of anthers from K-TCMS line KTM3315A during development under sterile and fertile conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28396677/gametocidal-factor-transferred-from-aegilops-geniculata-roth-can-be-adapted-for-large-scale-chromosome-manipulations-in-cereals
#5
Michał T Kwiatek, Halina Wiśniewska, Aurelia Ślusarkiewicz-Jarzina, Joanna Majka, Maciej Majka, Jolanta Belter, Hanna Pudelska
Segregation distorters are curious, evolutionarily selfish genetic elements, which distort Mendelian segregation in their favor at the expense of others. Those agents include gametocidal factors (Gc), which ensure their preferential transmission by triggering damages in cells lacking them via chromosome break induction. Hence, we hypothesized that the gametocidal system can be adapted for chromosome manipulations between Triticum and Secale chromosomes in hexaploid triticale (×Triticosecale Wittmack). In this work we studied the little-known gametocidal action of a Gc factor located on Aegilops geniculata Roth chromosome 4M(g)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28391694/molecular-characterization-and-variation-of-the-celiac-disease-epitope-domains-among-%C3%AE-gliadin-genes-in-aegilops-tauschii
#6
Yu-Ge Li, Hui-Hui Liang, Sheng-Long Bai, Yun Zhou, Guiling Sun, Ya-Rui Su, An-Li Gao, Da-Le Zhang, Suo-Ping Li
To explore the distribution and quantity of toxic epitopes in α-gliadins from Aegilops tauschii, a total of 133 complete α-gliadin coding sequences were obtained, including 69 pseudogenes with at least one premature stop codon and 64 genes with complete open reading frames (ORFs). Plenty of deletions and single amino acid substitutions were found in the 4 celiac disease (CD) toxic epitope domains through multiple alignments, in which the sequence of DQ2.5-glia-α2 demonstrated the most significant changes...
April 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28384292/molecular-mapping-of-the-grain-iron-and-zinc-concentration-protein-content-and-thousand-kernel-weight-in-wheat-triticum-aestivum-l
#7
Gopalareddy Krishnappa, Anju Mahendru Singh, Swati Chaudhary, Arvind Kumar Ahlawat, Santosh Kumar Singh, Ram Bihari Shukla, Jai Prakash Jaiswal, Gyanendra Pratap Singh, Ishwar Singh Solanki
Genomic regions responsible for accumulation of grain iron concentration (Fe), grain zinc concentration (Zn), grain protein content (PC) and thousand kernel weight (TKW) were investigated in 286 recombinant inbred lines (RILs) derived from a cross between an old Indian wheat variety WH542 and a synthetic derivative (Triticum dicoccon PI94624/Aegilops squarrosa [409]//BCN). RILs were grown in six environments and evaluated for Fe, Zn, PC, and TKW. The population showed the continuous distribution for all the four traits, that for pooled Fe and PC was near normal, whereas, for pooled Zn, RILs exhibited positively skewed distribution...
2017: PloS One
https://www.readbyqxmd.com/read/28364036/genotyping-by-sequencing-facilitates-a-high-density-consensus-linkage-map-for-aegilops-umbellulata-a-wild-relative-of-cultivated-wheat
#8
Erena A Edae, Pablo D Olivera, Yue Jin, Matthew N Rouse
High-density genetic maps are useful to precisely localize QTL or genes that might be used to improve traits of nutritional and/or economical importance in crops. However, high-density genetic maps are lacking for most wild relatives of crop species, including wheat. Aegilops umbellulata is a wild relative of wheat known for its potential as a source of biotic and abiotic stress resistance genes. In this work, we have developed a framework consensus genetic map using two biparental populations derived from accessions PI 298905, PI 542369, PI 5422375, and PI 554395...
May 5, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28351975/long-noncoding-mirna-gene-represses-wheat-%C3%AE-diketone-waxes
#9
Daiqing Huang, J Allan Feurtado, Mark A Smith, Leah K Flatman, Chushin Koh, Adrian J Cutler
The cuticle of terrestrial plants functions as a protective barrier against many biotic and abiotic stresses. In wheat and other Triticeae, β-diketone waxes are major components of the epicuticular layer leading to the bluish-white glaucous trait in reproductive-age plants. Glaucousness in durum wheat is controlled by a metabolic gene cluster at the WAX1 (W1) locus and a dominant suppressor INHIBITOR of WAX1 (Iw1) on chromosome 2B. The wheat D subgenome from progenitor Aegilops tauschii contains W2 and Iw2 paralogs on chromosome 2D...
April 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28286900/physical-mapping-of-dna-markers-linked-to-stem-rust-resistance-gene-sr47-in-durum-wheat
#10
Daryl L Klindworth, Jyoti Saini, Yunming Long, Matthew N Rouse, Justin D Faris, Yue Jin, Steven S Xu
Markers linked to stem rust resistance gene Sr47 were physically mapped in three small Aegilops speltoides chromosomal bins. Five markers, including two PCR-based SNP markers, were validated for marker-assisted selection. In durum wheat (Triticum turgidum subsp. durum), the gene Sr47 derived from Aegilops speltoides conditions resistance to race TTKSK (Ug99) of the stem rust pathogen (Puccinia graminis f. sp. tritici). Sr47 is carried on small interstitial translocation chromosomes (Ti2BL-2SL-2BL·2BS) in which the Ae...
March 12, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28275817/discovery-and-characterization-of-two-new-stem-rust-resistance-genes-in-aegilops-sharonensis
#11
Guotai Yu, Nicolas Champouret, Burkhard Steuernagel, Pablo D Olivera, Jamie Simmons, Cole Williams, Ryan Johnson, Matthew J Moscou, Inmaculada Hernández-Pinzón, Phon Green, Hanan Sela, Eitan Millet, Jonathan D G Jones, Eric R Ward, Brian J Steffenson, Brande B H Wulff
We identified two novel wheat stem rust resistance genes, Sr-1644-1Sh and Sr-1644-5Sh in Aegilops sharonensis that are effective against widely virulent African races of the wheat stem rust pathogen. Stem rust is one of the most important diseases of wheat in the world. When single stem rust resistance (Sr) genes are deployed in wheat, they are often rapidly overcome by the pathogen. To this end, we initiated a search for novel sources of resistance in diverse wheat relatives and identified the wild goatgrass species Aegilops sharonesis (Sharon goatgrass) as a rich reservoir of resistance to wheat stem rust...
March 8, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28264068/quantitative-trait-locus-analysis-for-spikelet-shape-related-traits-in-wild-wheat-progenitor-aegilops-tauschii-implications-for-intraspecific-diversification-and-subspecies-differentiation
#12
Ryo Nishijima, Yuki Okamoto, Hitoshi Hatano, Shigeo Takumi
Wild diploid wheat Aegilops tauschii, the D-genome progenitor of common wheat, carries large genetic variation in spikelet and grain morphology. Two differentiated subspecies of Ae. tauschii, subspecies tauschii and strangulata, have been traditionally defined based on differences in spikelet morphology. Here, we first assessed six spikelet shape-related traits among 199 Ae. tauschii accessions, and found that the accessions belonging to TauL1major lineage produced significantly longer spikes, higher spikelet density, and shorter, narrower spikelets than another major lineage, TauL2, in which the strangulata accessions are included...
2017: PloS One
https://www.readbyqxmd.com/read/28255671/identification-of-pm58-from-aegilops-tauschii
#13
Andrew T Wiersma, Jane A Pulman, Linda K Brown, Christina Cowger, Eric L Olson
A novel powdery mildew-resistance gene, designated Pm58, was introgressed directly from Aegilops tauschii to hexaploid wheat, mapped to chromosome 2DS, and confirmed to be effective under field conditions. Selectable KASP™ markers were developed for MAS. Powdery mildew caused by Blumeria graminis (DC.) f. sp. tritici (Bgt) remains a significant threat to wheat (Triticum aestivum L.) production. The rapid breakdown of race-specific resistance to Bgt reinforces the need to identify novel sources of resistance...
March 3, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28250587/bread-wheat-progenitors-aegilops-tauschii-dd-genome-and-triticum-dicoccoides-aabb-genome-reveal-differential-antioxidative-response-under-water-stress
#14
Yadhu Suneja, Anil Kumar Gupta, Navtej Singh Bains
Antioxidant enzymes are known to play a significant role in scavenging reactive oxygen species and maintaining cellular homeostasis. Activity of four antioxidant enzymes viz., superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR) was examined in the flag leaves of nine Aegilops tauschii and three Triticum dicoccoides accessions along with two bread wheat cultivars under irrigated and rain-fed conditions. These accessions were shortlisted from a larger set on the basis of field performance for a set of morpho-physiological traits...
January 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28224917/regulation-of-the-wheat-map-kinase-phosphatase-1-by-14-3-3-proteins
#15
Mouna Ghorbel, Valérie Cotelle, Chantal Ebel, Ikram Zaidi, Mélanie Ormancey, Jean-Philippe Galaud, Moez Hanin
Plant MAP kinase phosphatases (MKPs) are major regulators of MAPK signaling pathways and play crucial roles in controlling growth, development and stress responses. The presence of several functional domains in plant MKPs such as a dual specificity phosphatase catalytic domain, gelsolin, calmodulin-binding and serine-rich domains, suggests that MKPs can interact with distinct cellular partners, others than MAPKs. In this report, we identified a canonical mode I 14-3-3-binding motif (574KLPSLP579) located at the carboxy-terminal region of the wheat MKP, TMKP1...
April 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28187716/the-abundance-of-homoeologue-transcripts-is-disrupted-by-hybridization-and-is-partially-restored-by-genome-doubling-in-synthetic-hexaploid-wheat
#16
Ming Hao, Aili Li, Tongwei Shi, Jiangtao Luo, Lianquan Zhang, Xuechuan Zhang, Shunzong Ning, Zhongwei Yuan, Deying Zeng, Xingchen Kong, Xiaolong Li, Hongkun Zheng, Xiujin Lan, Huaigang Zhang, Youliang Zheng, Long Mao, Dengcai Liu
BACKGROUND: The formation of an allopolyploid is a two step process, comprising an initial wide hybridization event, which is later followed by a whole genome doubling. Both processes can affect the transcription of homoeologues. Here, RNA-Seq was used to obtain the genome-wide leaf transcriptome of two independent Triticum turgidum × Aegilops tauschii allotriploids (F1), along with their spontaneous allohexaploids (S1) and their parental lines. The resulting sequence data were then used to characterize variation in homoeologue transcript abundance...
February 10, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28163591/cytological-characterization-of-a-thermo-sensitive-cytoplasmic-male-sterile-wheat-line-having-k-type-cytoplasm-of-aegilops-kotschyi
#17
Liying Meng, Zihan Liu, Lingli Zhang, Gan Hu, Xiyue Song
Male sterility is an important tool for obtaining crop heterosis. A thermo-sensitive cytoplasmic male-sterile (TCMS) line was developed recently using a new method based on tiller regeneration. In the present study, we explored the critical growth stages required to maintain thermo-sensitive male sterility in TCMS lines and found that fertility is associated with abnormal tapetal and microspore development. We investigated the fertility and cytology of temperature-treated plant anthers at various developmental stages...
December 2016: Breeding Science
https://www.readbyqxmd.com/read/28130360/hybrid-assembly-of-the-large-and-highly-repetitive-genome-of-aegilops-tauschii-a-progenitor-of-bread-wheat-with-the-masurca-mega-reads-algorithm
#18
Aleksey V Zimin, Daniela Puiu, Ming-Cheng Luo, Tingting Zhu, Sergey Koren, Guillaume Marçais, James A Yorke, Jan Dvořák, Steven L Salzberg
Long sequencing reads generated by single-molecule sequencing technology offer the possibility of dramatically improving the contiguity of genome assemblies. The biggest challenge today is that long reads have relatively high error rates, currently around 15%. The high error rates make it difficult to use this data alone, particularly with highly repetitive plant genomes. Errors in the raw data can lead to insertion or deletion errors (indels) in the consensus genome sequence, which in turn create significant problems for downstream analysis; for example, a single indel may shift the reading frame and incorrectly truncate a protein sequence...
May 2017: Genome Research
https://www.readbyqxmd.com/read/28116459/homoeologous-recombination-based-transfer-and-molecular-cytogenetic-mapping-of-powdery-mildew-resistant-gene-pm57-from-aegilops-searsii-into-wheat
#19
Wenxuan Liu, Dal-Hoe Koo, Qing Xia, Chunxin Li, Fuqiang Bai, Yuli Song, Bernd Friebe, Bikram S Gill
Pm57, a novel resistant gene against powdery mildew, was transferred into common wheat from Ae. searsi and further mapped to 2S (s) #1L at an interval of FL0.75 to FL0.87. Powdery mildew, caused by the fungus Blumeria graminis f. sp. tritici, is one of the most severe foliar diseases of wheat causing reduction in grain yield and quality. Host plant resistance is the most effective and environmentally safe approach to control this disease. Tests of a set of Chinese Spring-Ae. searsii (S(s)S(s), 2n = 2x = 14) Feldman & Kislev ex K...
April 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28111365/plantrgdb-a-database-of-plant-retrocopied-genes
#20
Yi Wang
RNA-based gene duplication, known as retrocopy, plays important roles in gene origination and genome evolution. The genomes of many plants have been sequenced, offering an opportunity to annotate and mine the retrocopies in plant genomes. However, comprehensive and unified annotation of retrocopies in these plants is still lacking. In this study I constructed the PlantRGDB (Plant Retrocopied Gene DataBase), the first database of plant retrocopies, to provide a putatively complete centralized list of retrocopies in plant genomes...
January 22, 2017: Plant & Cell Physiology
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