|
|
|
| Registros recuperados: 332 | |
|
|
| García Franco, José Luis. |
| Phalaris minor Retz. (“alpistillo”) es considerada como una maleza importante en el cultivo de trigo en la región del Bajío Mexicano, que ha desarrollado resistencia a herbicidas inhibidores de la Acetil Coenzima A Carboxilasa (ACCasa). Se ha consignado que más de la mitad de la población de Phalaris spp. comúnmente escapa del control manual a causa de la similitud morfológica con el cultivo de trigo. El objetivo de la presente investigación fue determinar si existen diferencias morfológicas y fenológicas entre biotipos resistentes y susceptible de P. minor a los herbicidas, y cultivares de trigo. Se realizaron experimentos en Montecillo, México en condición de no competencia. Se emplearon cuatro biotipos de alpistillo resistentes y uno susceptible,... |
|
Palavras-chave: Graminicidas; Mimetismo; Caracterización morfológica; Trigo; Graminicides; Morphological characterization; Wheat; Botánica; Maestría; Mimicry. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1873 |
| |
|
|
| Alarcón Maldonado, Juan Carlos. |
| CIMMYT (Centro Internacional de Mejoramiento de Maíz y Trigo) tiene datos de calidad sobre los experimentos que se realizan en todos sus centros experimentales, y los procesos de concentración de la información se han afinado notablemente. Sin embargo, el acceso a estos datos está limitado en dos aspectos: sólo se pueden acceder vía una red local, o solicitando el envío de un dispositivo con los datos de interés, y aunque hay algunos informes programados, para obtener algún otro, las demoras son muy considerables. El trabajo de investigación que se documenta en esta tesis de Maestría resultó en el sistema CROPFINDER, que resuelve ambas situaciones. Se creó una base de datos que permite al sistema ofrecer las consultas que necesitan los... |
| Tipo: Tesis |
Palavras-chave: Consultas paramétricas; Maíz; Trigo; Trait; Maestría; Computo Aplicado; Parameterized queries; Maize; Wheat. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1322 |
| |
|
| |
|
| |
|
|
| Vanzetti,Leonardo Sebastián; Pflüger,Laura Alicia; Rodríguez-Quijano,Marta; Carrillo,José Maria; Helguera,Marcelo. |
| Amylose and amylopectin are the two polysaccharides that constitute starch in bread wheat and the enzyme GBSSI (Granule-bound starch synthase I), also known as waxy protein, is responsible for amylose synthesis in storage tissues. Decrease of the amylose content in starch has been associated with the lack of waxy protein(s). In this work, different sets of PCR markers were used to characterize the genetic variability of waxy loci from 103 Argentinean bread wheat cultivars. For the Wx-A1 locus, Wx-A1a and a novel molecular allele designed Wx-A1g were detected. Wx-B1 locus showed three alleles (Wx-B1a, Wx-B1b, Wx-B1e), and Wx-D1 locus showed only the Wx-D1a allele. Novel single-locus allele specific markers for Wx-A1b, Wx-B1b and Wx-D1b null alleles were... |
| Tipo: Journal article |
Palavras-chave: Characterization; Molecular markers; Triticum aestivum L.; Starch; Waxy genes; Wheat. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000100004 |
| |
|
|
| Junges,Amanda H.; Fontana,Denise C.; Pinto,Daniele G.. |
| This study aimed to propose methods to identify croplands cultivated with winter cereals in the northern region of Rio Grande do Sul State, Brazil. Thus, temporal profiles of Normalized Difference Vegetation Index (NDVI) from MODIS sensor, from April to December of the 2000 to 2008, were analyzed. Firstly, crop masks were elaborated by subtracting the minimum NDVI image (April to May) from the maximum NDVI image (June to October). Then, an unsupervised classification of NDVI images was carried out (Isodata), considering the crop mask areas. According to the results, crop masks allowed the identification of pixels with greatest green biomass variation. This variation might be associated or not with winter cereals areas established to grain production. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wheat; Black oat; Remote sensing; MODIS; NDVI. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400027 |
| |
|
|
| Lopes,Allan R.; Marcolin,Jonatas; Johann,Jerry A.; Boas,Márcio A. Vilas; Schuelter,Adilson R.. |
| ABSTRACT The aim of this study is to identify homogeneous rainfall zones in the winter and summer 1st and 2nd crops, in the state of Paraná, Brazil. The zones were defined by clustering using the expectation-maximization (EM) algorithm to transform seasonal rainfall series. Monthly average rainfall data collected from 157 weather stations for 20 years (1996 to 2015) were employed. The results show that the number of homogeneous zones varied among growing seasons. The summer crop presented two clusters, with rainfall averages of 1489 and 1925 mm; the second crop presented four clusters, with averages of 1849, 1004, 1454, and 1182 mm; and the winter crop had three clusters, with averages of 969, 1498, and 1171 mm. Clustering was a useful instrument to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data mining; Clusters; Expectation-maximization; Weka; Soybean; Maize; Wheat. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600707 |
| |
|
|
| Brasileiro-Vidal,Ana Christina; Cuadrado,Angeles; Brammer,Sandra P.; Benko-Iseppon,Ana Maria; Guerra,Marcelo. |
| The wheat line PF 839197 and six hybrid derivatives from a cross between PF 839197 and Thinopyrum ponticum were cytologically characterized by fluorescent in situ hybridization (FISH). Probes for the 5S and 45S rDNA genes (pTa794 and pTa71, respectively), a highly repetitive rye sequence (pSc119.2), the synthetic oligonucleotide (AAG)5, and total genomic DNA from Th. ponticum and rye were used. In the wheat line, a 1RS.1BL translocation was revealed by the labeling patterns produced with pSc119.2 and (AAG)5, and confirmed by genomic in situ hybridization (GISH) using rye genomic DNA as a probe. Analyses of partial amphiploids confirmed previous results indicating mitotic instability, with a tendency to stabilize at 2n = 42 or 56. GISH with Th. ponticum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wheat; Thinopyrum ponticum; Rye; Hybrid derivatives; GISH. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200022 |
| |
|
| |
|
| |
|
|
| Aggarwal,Rashmi; Kulshreshtha,Deepika; Sharma,Sapna; Singh,Vaibhav K.; Manjunatha,Channappa; Bhardwaj,Subhash C.; Saharan,Mahender S.. |
| Abstract Stripe rust caused by Puccinia striiformis f. sp. tritici (Pst) is one of the most devastating diseases of wheat (Triticum spp.) worldwide. Indian isolates were characterised based on their phenotypic reaction on differential hosts carrying different Yr genes. Based on virulence/avirulence structure, isolates were characterised into ten different pathotypes viz. 70S0-2, 67S64, 70S4, 66S0, 70S64, 66S64-1, 38S102, 47S102, 46S119, and 78S84. These Indian pathotypes of P. striiformis f. sp. tritici and 38 pathotypes of other rust species (P. graminis tritici and P. triticina) were used in this study to analyze their molecular phylogenetic relationship. The nucleotides of rDNA-ITS, partial β-tubulin and ketopantoate reductase genes of all the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wheat; Stripe rust; Virulence; Diversity; Phylogeny. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000500834 |
| |
|
|
| Hong,Min Jeong; Kim,Dae Yeon; Ahn,Joon-Woo; Kang,Si-Yong; Seo,Yong Weon; Kim,Jin-Baek. |
| Abstract We aimed to investigate the biological responses induced by acute and chronic gamma irradiation in colored wheat seeds rich in natural antioxidants. After acute and chronic irradiation, the phenotypic effects on plant growth, germination rate, seedling height, and root length were examined, and the biochemical changes were investigated by analyzing the expression of antioxidant enzyme-related genes, antioxidant enzyme activities, and total antioxidant capacity. High dosages of chronic radiation reduced plant growth compared with the controls. Electron spin resonance measurement and 2,2-diphenyl-1-picrylhydrazyl activity analysis showed lower amount of free radicals in colored wheat seeds on chronic irradiation with low dosage of gamma rays... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acute irradiation; Chronic irradiation; Wheat; Electron spin resonance; Anthocyanin. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400611 |
| |
|
|
| Ding,Bo; Wang,Junbin; Song,Na; Li,Ming; Cheng,Qiaolin; Huang,Guozhong; Guo,Yaolin; Fu,Yang; Xie,Chaojie; Sun,Qixin; Xie,Xiaodong. |
| WRKY transcription factors have been extensively characterized in the past 20 years, but in wheat, studies onWRKY genes and their function are lagging behind many other species. To explore the function of wheat WRKY genes, we identified a TaWRKY68 gene from a common wheat cultivar. It encodes a protein comprising 313 amino acids which harbors 19 conserved motifs or active sites. Gene expression patterns were determined by analyzing microarray data of TaWRKY68 in wheat and of orthologous genes from maize, rice and barley using Genevestigator. TaWRKY68 orthologs were identified and clustered using DELTA-BLAST and COBALT programs available at NCBI. The results showed that these genes, which are expressed in all tissues tested, had relatively higher levels in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wheat; TaWRKY68; Orthologous genes; Genevestigator; Gene functions. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000100013 |
| |
|
|
| Yingshan,Dong; Xiuling,Bu; Yushi,Luan; Mengyuan,He; Bao,Liu. |
| A putative translocation line (#32), together with a disomic addition line (TAI27) and an octo-amphiploid line (Zhong3) of common wheat and Thinopyrum intermedium were characterized by restriction fragment length polymorphism (RFLP) analysis, using probes covering all seven homoeologous groups of Triticeae. Line 32 was confirmed to be a cryptic translocation line, based on the detection of multiple introgressed hybridization fragments specific to Th. intermedium in the RFLP patterns, and the absence of a hybridization signal in GISH analysis. In addition, extensive genomic changes, as compared to the wheat parent, were detected on all three lines studied, with a great majority of changes showing concordance among the lines. Our data is consistent with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Translocation; Genomic changes; Allopolyploidy and aneuploidy; Wheat; Thinopyrum intermedium. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200018 |
| |
|
| |
|
| |
|
|
| Caverzan,Andréia; Casassola,Alice; Brammer,Sandra Patussi. |
| Abstract Currently, food security depends on the increased production of cereals such as wheat (Triticum aestivum L.), which is an important source of calories and protein for humans. However, cells of the crop have suffered from the accumulation of reactive oxygen species (ROS), which can cause severe oxidative damage to the plants, due to environmental stresses. ROS are toxic molecules found in various subcellular compartments. The equilibrium between the production and detoxification of ROS is sustained by enzymatic and nonenzymatic antioxidants. In the present review, we offer a brief summary of antioxidant defense and hydrogen peroxide (H2O2) signaling in wheat plants. Wheat plants increase antioxidant defense mechanisms under abiotic stresses, such... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic stress; Antioxidant enzymes; Hydrogen peroxide signaling; Wheat; Triticum aestivum. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100001 |
| |
|
|
| Qin,Peng; Lin,Yu; Hu,Yaodong; Liu,Kun; Mao,Shuangshuang; Li,Zhanyi; Wang,Jirui; Liu,Yaxi; Wei,Yuming; Zheng,Youliang. |
| Abstract The D-genome progenitor of wheat (Triticum aestivum), Aegilops tauschii, possesses numerous genes for resistance to abiotic stresses, including drought. Therefore, information on the genetic architecture of A. tauschii can aid the development of drought-resistant wheat varieties. Here, we evaluated 13 traits in 373 A. tauschii accessions grown under normal and polyethylene glycol-simulated drought stress conditions and performed a genome-wide association study using 7,185 single nucleotide polymorphism (SNP) markers. We identified 208 and 28 SNPs associated with all traits using the general linear model and mixed linear model, respectively, while both models detected 25 significant SNPs with genome-wide distribution. Public database searches... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aegilops tauschii; Drought resistance; Genome-wide association study; Single nucleotide polymorphism; Wheat. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300398 |
| |
|
| |
|
| |
| Registros recuperados: 332 | |
|
|
|
