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| Registros recuperados: 77 | |
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| Rodríguez-García,M. Florencia; Huerta-Espino,Julio; Villaseñor-Mir,Héctor E.; Sandoval Islas,José S.; Singh,Ravi P.. |
| La roya amarilla (Puccinia striiformis f. sp. tritici) del trigo (Triticum aestivum L.) causa pérdidas importantes en rendimiento en los Valles Altos de México, debido a que el hongo puede evolucionar y vencer la resistencia de las nuevas variedades. Por tanto, se estudio la virulencia de este patógeno en los ciclos Primavera-Verano (P-V)/2005, 2006 y 2007 en los Valles Altos de México. Se recolectaron hojas y espigas infectadas con el hongo causante de la roya amarilla de zonas productoras de los estados de Tlaxcala, Hidalgo, Puebla y el Estado de México. Las muestras se procesaron en el Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) ubicado en El Batán, Texcoco, Estado de México. Para identificar las razas fisiológicas se usaron 14 líneas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P. striiformis f. sp. tritici; Genes; Variedades; Raza fisiológica; Trigo; Yr. |
| Ano: 2010 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952010000400009 |
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| Blel, H.; Said, K.; Durand, J.D.. |
| Afin d’étudier les relations phylogénétiques chez les six espèces méditerranéennes de la famille de Mugilidé en Tunisie (Mugil cephalus, Chelon labrosus, Liza aurata, Liza ramada, Liza saliens et Oedalechilus labeo), un fragment de 589pb du gène mitochondrial ARN 16S a été analysé. Ce gène à été amplifié, séquencé puis analysé chez les différentes espèces. La détermination des différentes espèces de mugilidé réalisée dans cette étude est en accord avec les données de séquences disponibles dans GenBank et confirme la présence de l’espèce Oedalechilus labeo dans les côtes tunisiennes malgré sa rareté. L’arbre phylogénétique établit confirme la grande divergence de Mugil cephalus par rapport aux autres espèces présentes en Méditerranée. Le genre Oedalechilus... |
| Tipo: Journal Contribution |
Palavras-chave: Genes. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5903 |
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| Bassoi,Manoel Carlos; Flintham,John; Riede,Carlos Roberto. |
| The objective of this work was to evaluate the possibility of obtaining recombinant inbred wheat lines more resistant to preharvest sprouting, independently of colour genes, in three red-grained Brazilian wheat populations. The results showed statistical significance among lines within all populations, which presented a normal distribution and transgressive segregation for preharvest sprouting. The normal distribution of the lines from all red-grained populations suggests that sprouting, excluding the genes expressing seed coat pigmentation, is, probably, controlled by many genes. These findings also indicate that it may be possible to improve resistance to preharvest sprouting, independently of the colour genes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Dormancy; Grain colour; Genes; Genetic variation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000400006 |
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| Prudence, Marie. |
| Two amylase genes, A and B, from the oyster Crassostrea gigas were characterized. Using PCR-RFLP, 6 and 4 alleles, respectively, were described for the amylase genes A and B. The roles of A and B amylase genes were investigated experimentally. They are expressed during larval and adult stages, and A transcripts are more abundant than B. The A transcript increases significantly with temperature, in high trophic conditions. However, A and B transcript levels do not change when food quantity increases although amylase activity augments. The level of B is correlated with dietary starch quantities, whereas the amount of A appears to remain constant ; simultaneously amylase activity decreases and the KM increases. These results suggest that expression of B is... |
| Tipo: Text |
Palavras-chave: Enzymatic analyse; Genetic polymorphism; Genes; Nutrition; Growth; Environmental effects; Oysters; Amylases; Amylases; Analyse enzymatique; Polymorphisme génétique; Gènes; Nutrition; Croissance; Effets de l'environnement; Huîtres; Amylases; Amylases. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/these-1700.pdf |
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| Lara Lorenzo, A.. |
| En el presente trabajo se realizó el análisis del código de barras ADN de 24 especies de la ictiofauna dulceacuícola cubana. Para ello, se secuenciaron 652pb del gen mitocondrial citocromo oxidasa I (COI) de 96 individuos provenientes de diferentes áreas geográficas y representativos, en la mayoría de los casos, de la distribución espacial de cada especie. En el análisis se utilizó la distancia genética Kimura 2 parámetros (K2P), considerando como cota superior el valor de 3%, para identificar los límites de divergencia entre especies. Complementariamente se llevó a cabo un análisis de agregación poblacional para identificar grupos poblacionales indicativos de linajes evolutivos independientes. El estimado promedio de divergencia genética entre... |
| Tipo: Theses and Dissertations |
Palavras-chave: CDNA; Genes; Fishes; Fish wastes. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5514 |
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| Lima, Maria da Graça de Souza; Universidade Federal de Pelotas; Lopes, Nei Fernandes; Universidade Federal de Pelotas; Zimmer, Paulo Dejalma; Universidade Federal de Pelotas; Meneghello, Geri Eduardo; Universidade Federal de Pelotas; Ferrari, Cibele; Universidade Federal de Pelotas; Mendes, Cristina Rodrigues; Universidade Federal de Pelotas. |
| The present study aimed to identify salinity-tolerant genes in three cultivars (BRS-7 Taim, BRS Querência and BRS Atalanta) of Oryza sativa L. ssp. indica S. Kato and in three cultivars (BRS Bojurú, IAS 12-9 Formosa and Goyakuman) of Oryza sativa L. ssp. japonica S. Kato. Ten days after emergence seedlings were transferred to a greenhouse and placed in a 15L vessel with half strength Hoagland nutrient solution, which was changed every four days, under controlled temperature and humidity. Plants were harvested 56 days after transfer. DNA extraction was carried out by CTAB method and salinity-tolerant genes SOS and CK1 were identified by in silico research. Amplification of gene sequence was performed with in silico primers. Bands were detected by agar gel... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.03.03.00-9 Oryza sativa L.; Cultivars; Salinity-tolerance; Genes; In silico Biologia Molecular. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/15437 |
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| Registros recuperados: 77 | |
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