Color Polymorphism
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. Implicações do polimorfismo visual do sagui-do-cerrado (Callithrix penicillata - Primates) sobre a detecção de potenciais predadores
Introdução: A evolução da visão de cores dos primatas é uma questão não totalmente compreendida. Por este grupo se mostrar muito dependente da visão e devido à curiosa diferenciação entre os macacos do Novo e do Velho Mundo, com o polimorfismo visual nos platirrinos e o tricromatismo uniforme nos catarrinos, há na literatura uma busca constante
Publicado em: 2009
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14. Apolipoprotein E polymorphism distribution in an elderly Brazilian population: the Bambuí Health and Aging Study
Apolipoprotein E (ApoE) is one of the most extensively studied genes in the context of aging, but there are few population-based studies on ApoE polymorphism in the elderly in developing countries. The objective of the present study was to assess ApoE allele and genotype distribution in a large elderly community-based sample and its association with age, sex
Brazilian Journal of Medical and Biological Research. Publicado em: 22/10/2007
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15. Associations of MYF5 gene polymorphisms with meat quality traits in different domestic pig (Sus scrofa) populations
The MYF5 gene is first inducibly expressed in muscle cell during embryonic muscle development and plays an important role in regulating the differentiation of skeletal muscle precursors. In this study we used PCR-RFLP to investigate two pig (Sus scrofa) populations (n = 302) for two MYF5 gene polymorphisms, a previously unreported novel Met-Leu shift single
Genetics and Molecular Biology. Publicado em: 2007-03
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16. Intraspecific differentiation of Chilean isolates of the entomopathogenic fungi Metarhizium anisopliae var. anisopliae as revealed by RAPD, SSR and ITS markers
The genus Metarhizium consists of a diverse group of asexual entomopathogenic fungi, which have a wide geographical distribution. The Chilean National Agricultural Research Institute (Instituto de Investigaciones Agropecuarias - INIA, Quilamapu Chile) has collected about 350 isolates of Metarhizium anisopliae var. anisopliae from central and southern Chile.
Genetics and Molecular Biology. Publicado em: 2007
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17. Isolamento e identificação de actinobacterias em solos de terra preta antropogenica (TPA) da Amazonia Central por ARDRA e sequenciamento do gene 16S rRNA. / Isolation and identification of actinobacteria in anthropogenic dark earth of Central Amazon by ARDRA and seguencing of 16S rRNA gene.
Actinomycetes have been especially useful in the pharmaceutical industry for their unlimited capacity to produce secondary metabolites with diverse chemical structures and biological activities. The search for novel species of actinomycetes constitutes an essential component for the discovery of new pharmaceutical drugs. Actinomycetes are widely distributed
Publicado em: 2006
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18. Somaclonal variation in Asparagus officinalis plants regenerated by organogenesis from long-term callus cultures
Somaclonal variation in plants regenerated by organogenesis from long-term cultured calluses of two diploid staminate genotypes of Asparagus officinalis cv. Argenteuil was characterized by plant phenotype, ploidy, meiotic behavior, pollen viability, fruit and seed set, and AFLP profiles. Phenotypic deviations from the donors were detected in foliage color, f
Genetics and Molecular Biology. Publicado em: 2005-09
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19. Temperature, urbanization and body color polymorphism in South Brazilian populations of Drosophila kikkawai (Diptera, Drosophilidae)
Body color polymorphism of urban populations of cosmopolite fly Drosophila kikkawai Burla, 1954 was investigated in relation to its possible association with environmental temperature. Samples of D. kikkawai were collected in spring, summer, autumn and winter between 1987 to 1988, in zones with different levels of urbanization in the southern Brazilian city
Iheringia. Série Zoologia. Publicado em: 30/12/2003
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20. Analise citogenetica e do DNA mitocondrial de populações de Hyla semiguttata (Anura, Hylidae) e especies relacionadas
Polymorphic populations of Hyla semiguttata and related species in the Hyla pulchella group were analyzed cytogenetically and by comparing the sequences of the cytochrome b gene and the control region of mitochondrial DNA. All H semiguttata populations showed polymorphism in color pattern, body size and acoustics. The cytogenetic analysis showed a karyotype
Publicado em: 2002
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21. Morphometric analysis, mimicry, and color polymorphism in five species of Chauliognathus Hentz (Coleoptera, Cantharidae)
This study presents data on morphometric variation for length and width of elytra in tive sympatric species of the genus Chauliognathus Hentz, 1830: C. flavipes Fabricius, 1781, C. octomaculatus Pie, 1915, C. expansus Waterhouse, 1878, C. fallax Germar, 1824 and C. lineatus Zwetsch & Machado, 2000. The meaning of this variation is discussed in the light of t
Revista Brasileira de Zoologia. Publicado em: 2001-09
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22. CaracterÃsticas morfofisiolÃgicas e polimorfismo de dna de isolados de Fusarium oxysporum f.sp. passiflorae do Nordeste do Brasil
Fifteen isolated of f.oxysporum f. sp. passiflorae proceeding from the northeast of Brazil had been analysed about its genetic variability through the technique of RAPD (Random Amplified Polymorphic DNA) and in terms of morphophisiologyc features. The isolated had been obtained from the URM/UFPE culture collection, Recife-PE. In the first stage of this work,
Publicado em: 2000
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23. Negative frequency-dependent selection maintains a dramatic flower color polymorphism in the rewardless orchid Dactylorhiza sambucina (L.) Soò
The orchid Dactylorhiza sambucina shows a stable and dramatic flower-color polymorphism, with both yellow- and purple-flowered individuals present in natural populations throughout the range of the species in Europe. The evolutionary significance of flower-color polymorphisms found in many rewardless orchid species has been discussed at length, but the
The National Academy of Sciences.
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24. Darwinian natural selection for orange bioluminescent color in a Jamaican click beetle
The Jamaican click beetle Pyrophorus plagiophthalamus (Coleoptera: Elateridae) is unique among all bioluminescent organisms in displaying a striking light color polymorphism [Biggley, W. H., Lloyd, J. E. & Seliger, H. H. (1967) J. Gen. Physiol. 50, 1681–1692]. Beetles on the island vary in the color of their ventral light organs from yellow–green to oran
National Academy of Sciences.