... ESTACIONES CLIMATOLÓGICAS DE VENEZUELA Raúl Martínez1, Millena Ariana Boueri1 y Pedro Escalon... more ... ESTACIONES CLIMATOLÓGICAS DE VENEZUELA Raúl Martínez1, Millena Ariana Boueri1 y Pedro Escalona2 ... Méndez y Rojas (1973) señalaron que el principal problema para la programación de obras de riego es la insuficiencia de datos de evapotranspiración (ET). ...
Members of the genus Colletotrichum include some of the most economically important fungal pathog... more Members of the genus Colletotrichum include some of the most economically important fungal pathogens in the world. Accurate diagnosis is critical to devising disease management strategies. Two species, Colletotrichum gloeosporioides and C. truncatum, are responsible for anthracnose disease in papaya (Carica papaya L.) and bell pepper (Capsicum annuum L.) in Trinidad. The ITS1–5.8S–ITS2 region of 48 Colletotrichum isolates was sequenced, and the ITS PCR products were analyzed by PCR-RFLP analysis. Restriction site polymorphisms generated from 11 restriction enzymes enabled the identification of specific enzymes that were successful in distinguishing between C. gloeosporioides and C. truncatum isolates. Species-specific restriction fragment length polymorphisms generated by the enzymes AluI, HaeIII, PvuII, RsaI, and Sau3A were used to consistently resolve C. gloeosporioides and C. truncatum isolates from papaya. AluI, ApaI, PvuII, RsaI, and SmaI reliably separated isolates of C. gloeosporioides and C. truncatum from bell pepper. PvuII, RsaI, and Sau3A were also capable of distinguishing among the C. gloeosporioides isolates from papaya based on the different restriction patterns that were obtained as a result of intra-specific variation in restriction enzyme recognition sites in the ITS1–5.8S–ITS2 rDNA region. Of all the isolates tested, C. gloeosporioides from papaya also had the highest number of PCR-RFLP haplotypes. Cluster analysis of sequence and PCR-RFLP data demonstrated that all C. gloeosporioides and C. truncatum isolates clustered separately into species-specific clades regardless of host species. Phylograms also revealed consistent topologies which suggested that the genetic distances for PCR-RFLP-generated data were comparable to that of ITS sequence data. ITS PCR-RFLP fingerprinting is a rapid and reliable method to identify and differentiate between Colletotrichum species.
La República Popular de China, tiene una superficie aproximada de 9.6 millones de Km², siendo el ... more La República Popular de China, tiene una superficie aproximada de 9.6 millones de Km², siendo el país más grande de Asia y el tercero a nivel mundial después de Rusia (17 millones de Km²) y de Canadá (10 millones de Km²). México tiene una extensión territorial de casi 2 ...
... ESTACIONES CLIMATOLÓGICAS DE VENEZUELA Raúl Martínez1, Millena Ariana Boueri1 y Pedro Escalon... more ... ESTACIONES CLIMATOLÓGICAS DE VENEZUELA Raúl Martínez1, Millena Ariana Boueri1 y Pedro Escalona2 ... Méndez y Rojas (1973) señalaron que el principal problema para la programación de obras de riego es la insuficiencia de datos de evapotranspiración (ET). ...
Members of the genus Colletotrichum include some of the most economically important fungal pathog... more Members of the genus Colletotrichum include some of the most economically important fungal pathogens in the world. Accurate diagnosis is critical to devising disease management strategies. Two species, Colletotrichum gloeosporioides and C. truncatum, are responsible for anthracnose disease in papaya (Carica papaya L.) and bell pepper (Capsicum annuum L.) in Trinidad. The ITS1–5.8S–ITS2 region of 48 Colletotrichum isolates was sequenced, and the ITS PCR products were analyzed by PCR-RFLP analysis. Restriction site polymorphisms generated from 11 restriction enzymes enabled the identification of specific enzymes that were successful in distinguishing between C. gloeosporioides and C. truncatum isolates. Species-specific restriction fragment length polymorphisms generated by the enzymes AluI, HaeIII, PvuII, RsaI, and Sau3A were used to consistently resolve C. gloeosporioides and C. truncatum isolates from papaya. AluI, ApaI, PvuII, RsaI, and SmaI reliably separated isolates of C. gloeosporioides and C. truncatum from bell pepper. PvuII, RsaI, and Sau3A were also capable of distinguishing among the C. gloeosporioides isolates from papaya based on the different restriction patterns that were obtained as a result of intra-specific variation in restriction enzyme recognition sites in the ITS1–5.8S–ITS2 rDNA region. Of all the isolates tested, C. gloeosporioides from papaya also had the highest number of PCR-RFLP haplotypes. Cluster analysis of sequence and PCR-RFLP data demonstrated that all C. gloeosporioides and C. truncatum isolates clustered separately into species-specific clades regardless of host species. Phylograms also revealed consistent topologies which suggested that the genetic distances for PCR-RFLP-generated data were comparable to that of ITS sequence data. ITS PCR-RFLP fingerprinting is a rapid and reliable method to identify and differentiate between Colletotrichum species.
La República Popular de China, tiene una superficie aproximada de 9.6 millones de Km², siendo el ... more La República Popular de China, tiene una superficie aproximada de 9.6 millones de Km², siendo el país más grande de Asia y el tercero a nivel mundial después de Rusia (17 millones de Km²) y de Canadá (10 millones de Km²). México tiene una extensión territorial de casi 2 ...
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