Polyploids
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Can plant hybridization and polyploidy lead to pollinator shift?
ABSTRACT Events of both hybridization and polyploidy are capable of completely restructuring the genome, modifying phenotypic traits and affecting ecological interactions. For plants, these changes may affect floral traits that are important for interactions with pollinators, which could lead to shifts in pollinator behavior and taxa between hybrids/polyploi
Acta Bot. Bras.. Publicado em: 2020-06
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2. In vitro induction and regeneration of tetraploids and mixoploids of two cassava cultivars
Abstract We report the in vitro induction of polyploids from two cassava cultivars by colchicine treatment. Shoot nodal segments, collected from in vitro cultivated plants of Porquinho and Vassourinha cultivars, were used as explants. Explants were treated in liquid media without and with colchicine (0.05, 0.10 or 0.15%), at 90 rpm, in the dark, for 48 or 96
Crop Breed. Appl. Biotechnol.. Publicado em: 2018-04
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3. Desenvolvimento de um modelo para construção de mapas genéticos em autopoliploides, com aplicações em cana-de-açúcar / Development of a model to build genetic maps in autopolyploides, with applications in sugarcane
Autopolyploid species are extremely important in agriculture. However, the complex structure of their genomes is not well understood. Despite all advances in genetic mapping of autotetraploids, the vast majority of the models used for autopolyploid species with high ploidy level, such as sugarcane, are approximations of those used in diploid organisms. Thus,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2012
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4. A polymorphic microsatellite from the Squalius alburnoides complex (Osteichthyes, Cyprinidae) cloned by serendipity can be useful in genetic analysis of polyploids
A new microsatellite locus (SAS1) for Squalius alburnoides was obtained through cloning by serendipity. The possible usefulness of this new species-specific microsatellite in genetic studies of this hybrid-species complex, was explored. The polymorphism exhibited by SAS1 microsatellite is an important addition to the set of microsatellites previously used in
Genetics and Molecular Biology. Publicado em: 08/07/2011
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5. A high-throughput data mining of single nucleotide polymorphisms in Coffea species expresed sequence tags suggests differential homeologous gene expression in the allotetrapoloid Coffea arabica.
Polyploidization constitutes a common mode of evolution in flowering plants. This event provides the raw material for the divergence of function in homeologous genes, leading to phenotypic novelty that can contribute to the success of polyploids in nature or their selection for use in agriculture. Mounting evidence underlined the existence of homeologous exp
PLANT PHYSIOLOGY. Publicado em: 2011
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6. A high-throughput data mining of single nucleotide polymorphisms in Coffea species expresed sequence tags suggests differential homeologous gene expression in the allotetrapoloid Coffea arabica.
Polyploidization constitutes a common mode of evolution in flowering plants. This event provides the raw material for the divergence of function in homeologous genes, leading to phenotypic novelty that can contribute to the success of polyploids in nature or their selection for use in agriculture. Mounting evidence underlined the existence of homeologous exp
PLANT PHYSIOLOGY. Publicado em: 2011
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7. Induction and identification of polyploids in Cattleya intermedia Lindl. (Orchidaceae) by in vitro techniques
Publicado em: 2010
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8. Citogenética evolutiva en Leguminosas americanas
ABSTRACT Chromosomic features described so far for Americans legumes are reviewed and analyzed, simultaneously with morphological and molecular characters. This is an invaluable opportunity to propose hypotheses about chromosome changes during the family divergence and speciation processes. The chromosome studies showed wide inter-generic, inter and intra-sp
Rodriguésia. Publicado em: 2008-07
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9. Symmetric pollen mitosis I and suppression of pollen mitosis II prevent pollen development in Brachiaria jubata (Gramineae)
Microsporogenesis and pollen development were analyzed in a tetraploid (2n = 4x = 36) accession of the forage grass Brachiaria jubata (BRA 007820) from the Embrapa Beef Cattle Brachiaria collection that showed partial male sterility. Microsporocytes and pollen grains were prepared by squashing and staining with 0.5% propionic carmine. The meiotic process was
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-11
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10. InduÃÃo de tetraplÃides e alongamento de plantas de Dendrobium nobile Lindl. (Orchidaceae. / Tetraploids induction and elongation of Dendrobium nobile Lindl. plants (Orchidaceae).
The present study was developed at the campus of the Universidade Federal de Lavras, Minas Gerais, over period from January of 2003 to February of 2005, aiming at, for Dendrobium nobile Lindl., the induction and polyploidys identification, the stomatal analysis in diploid (2n=2x=38) and tetraploids (2n=4x=76) leaves, as well as the plant elongation with gibb
Publicado em: 2005
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11. The role of genetic and genomic attributes in the success of polyploids
In 1950, G. Ledyard Stebbins devoted two chapters of his book Variation and Evolution in Plants (Columbia Univ. Press, New York) to polyploidy, one on occurrence and nature and one on distribution and significance. Fifty years later, many of the questions Stebbins posed have not been answered, and many new questions have arisen. In this paper, we review
The National Academy of Sciences.
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12. Multiple origins of polyploids in the Glycine tabacina complex inferred from chloroplast DNA polymorphism.
The Glycine tabacina polyploid complex has been shown to include a minimum of two morphological and crossing groups, which also differ in chloroplast DNA (cpDNA) restriction map and nuclear ribosomal gene repeat phenotype. These AAB2B2 and BBB2B2 G. tabacina polyploids contain plastomes referable to the A and B diploid plastome groups of subgenus Glycine, re