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Genetic analyses of Rhizoctonia solani isolates from Phaseolus vulgaris grown in the Atlantic Rainforest Region of São Paulo, Brazil 102
MEINHARDT,LYNDEL W.; WULFF,NELSON A.; BELLATO,CLÁUDIA M.; TSAI,SIU M..
Rhizoctonia solani isolates obtained from common beans (Phaseolus vulgaris) grown in the mountainous Atlantic Rainforest (Mata Atlântica) region of São Paulo, Brazil, were analyzed to determine their genetic diversity using internal transcribed spacer (ITS), microsatellite and telomere sequence-based PCR primers. Restriction digestion of the ITS1/5.8S/ITS2 ribosomal regions yielded unique banding patterns specific for AG4 and its subgroups. The ITS restriction digestion (ITS/RFLP), telomere and microsatellite primers identified five to 11 genotypes within the isolates of R. solani. While all isolates were pathogenic on beans, there was no correlation found between genotypic differences and pathogenicity. The different PCR primers revealed a number of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mata Atlântica; Genetic biodiversity; Soil-borne fungi; ITS; Telomere.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000300004
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Non-random distribution of high density chromatin detected at opposite ends of T-banded human metaphase chromosomes 74
Santiñaque,Federico F.; Drets,Máximo E..
Previous research using microdensitometric scanning and computer graphic image analysis showed that T-banded segments of human metaphase chromosomes usually exhibit an asymmetrical distribution of high density (HD) chromatin between sister chromatids. Here, we employed the same methods to analyze HD chromatin distribution at opposite ends of T-banded human lymphocyte chromosomes. This study revealed that in most chromosomes with an asymmetrical distribution of HD chromatin at both ends, the highest densities of each arm were located in opposite chromatids. The frequency of this configuration was 0.792 per chromosome, indicating that the highest chromatin densities of the terminal segments of T-banded human chromosomes were non-randomly distributed at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Human chromosomes; T-banding; Chromatin structure; Telomere; Microdensitometry.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600004
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Starting with a handicap: phenotypic differences between early- and late-born king penguin chicks and their survival correlates 5
Stier, Antoine; Viblanc, Vincent A.; Massemin-challet, Sylvie; Handrich, Yves; Zahn, Sandrine; Rojas, Emilio R.; Saraux, Claire; Le Vaillant, Maryline; Prud'Homme, Onesime; Grosbellet, Edith; Robin, Jean-patrice; Bize, Pierre; Criscuolo, Francois.
1. The exceptionally long (c. 11 months) growth period of king penguin chicks (Aptenodytes patagonicus) is interrupted by the Austral winter. As a consequence, penguin chicks born late in the breeding season have little time to build-up their energy reserves before the drastic energy bottleneck they experience during winter and face greater risks of mortality than early-born chicks. 2. Whereas it is well known that breeding adults alternate between early- and late-breeding attempts, little is known on the phenotype of early- and late-chicks, and on the potential existence of specific adaptive phenotypic responses in late-born individuals. 3. We investigated phenotypic differences between early- and late-chicks and tested their survival correlates both...
Tipo: Text Palavras-chave: Early-life conditions; Phenotypic plasticity; Oxidative stress; Individual quality; Growth; Telomere; Corticosterone; Reproductive timing.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00170/28175/32107.pdf
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