Diploids
Mostrando 1-12 de 452 artigos, teses e dissertações.
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1. Cytogenetic studies in three diploid species of Andropogon (Andropogoneae), section Leptopogon
Abstract Karyotypes can provide a relevant information about relationships and evolutionary origin among species of the Andropogon genus. This paper presents the karyotype, C+ and DAPI/CMA3 banding and DNA content of three diploid (2n=20) species belonging to section Leptopogon: A. selloanus, A. macrothrix and A. gyrans. Karyotypes of the three diploid speci
Rodriguésia. Publicado em: 08/08/2019
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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. Cytological and genome size data analyzed in a phylogenetic frame: Evolutionary implications concerning Sisyrinchium taxa (Iridaceae: Iridoideae)
Abstract Sisyrinchium is the largest genus of Iridaceae in the Americas and has the greatest amount of cytological data available. This study aimed at investigating how genomes evolved in this genus. Chromosome number, genome size and altitude from species of sect. Viperella were analyzed in a phylogenetic context. Meiotic and pollen analyses were performed
Genet. Mol. Biol.. Publicado em: 01/03/2018
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4. Genome-wide gene expression patterns in dikaryon of the basidiomycete fungus Pleurotus ostreatus
Abstract Dikarya is a subkingdom of fungi that includes Ascomycota and Basidiomycota. The gene expression patterns of dikaryon are poorly understood. In this study, we bred a dikaryon DK13 × 3 by mating monokaryons MK13 and MK3, which were from the basidiospores of Pleurotus ostreatus TD300. Using RNA-Seq, we obtained the transcriptomes of the three strains
Braz. J. Microbiol.. Publicado em: 2017-06
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5. Genetic and cytological diversity in cherry tree accessions ( Eugenia involucrata DC) in Rio Grande do Sul
Abstract This study aimed to evaluate the genetic and cytological diversity and stability of 35 cherry tree accessions collected in Rio Grande do Sul. We used 15 RAPD (Random Amplified Polymorphic DNA) molecular markers and performed cytological analysis and number count of anthers. Analyses of genetic diversity allowed the separation of accessions into four
Crop Breed. Appl. Biotechnol.. Publicado em: 2016-09
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6. Ploidy levels in Citrus clementine affects leaf morphology, stomatal density and water content
The objective of the present study was to understand the relationship among leaf morphology, stomatal characteristics and water relations in triploids generated through anther culture and their counterpart diploid plant of C. clementina. Triploid plants possessed small and narrow leaves as compared to diploid plant as evident by less leaf length, leaf width
Theor. Exp. Plant Physiol.. Publicado em: 2013-12
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7. Diversidade genética de isolados do fungo Sporisorium scitamineum analisada através de fingerprinting da região telomérica / Genetic diversity of isolates of the fungus Sporisorium scitamineum analyzed by fingerprinting the telomeric region
The genetic diversity of Sporisorium scitamineum, the sugarcane smut agent, was characterized in a 14 isolates collection. The isolates were obtained from various sugarcane growing areas and RFLP of the telomeric region was used as molecular marker, compared with AFLP. Teliospores were collected from the whip of infected plants. Teliospores are diploids and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/09/2012
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8. Cultura de anteras e partenogênese in situ e in vitro de genótipos de laranja doce (Citrus sinensis Osbeck.) / Anther culture and in vitro and in situ parthenogenesis of sweet orange (Citrus sinensis Osbeck.) genotypes
The production of completely homozygous lines in citrus breeding program is hard, and double-haploid plantlets (completely homozygous lines) can be used to improve these breeding programs. However, many factors are associated with the success of the regeneration of haploid or double-haploid plants. The aim of this study was the induction and regeneration of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/06/2012
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9. Characterization of novel microsatellite markers in Musa acuminata subsp. burmannicoides, var. Calcutta 4.
Banana is a nutritionally important crop across tropical and sub-tropical countries in sub-Saharan Africa, Central and South America and Asia. Although cultivars have evolved from diploid, triploid and tetraploid wild Asian species of Musa acuminata (A genome) and Musa balbisiana (B genome), many of today's commercial cultivars are sterile triploids or diplo
BMC Research Notes. Publicado em: 2011
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10. Variabilidade genética estimada entre diplóides de banana por meio de marcadores microssatélites.
O objetivo deste trabalho foi estimar a divergência genética entre 38 diplóides de banana do programa de melhoramento da Embrapa Mandioca e Fruticultura Tropical, incluindo genótipos melhorados, cultivados e selvagens, por meio de 15 marcadores microssatélites ou SSR. As similaridades genéticas, com base no coeficiente de Jaccard, foram utilizadas
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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11. Melhoramento genetico da bananeira.
Este trabalho objetivou avaliar a eficiencia do sistema convencional de melhoramento de banana com vistas a produtividade e resistencia a doencas, mediante hibridacoes e a tecnica de cultura de embrioes usada no resgate de hibridos tetraploides (AAAB). Os melhores diploides (AA) do banco de germoplasma foram intercruzados, sendo 16 selecionados visando produ
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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12. Nucleotide diversity and molecular evolution of the WAG-2 gene in common wheat (Triticum aestivum L) and its relatives
In this work, we examined the genetic diversity and evolution of the WAG-2 gene based on new WAG-2 alleles isolated from wheat and its relatives. Only single nucleotide polymorphisms (SNP) and no insertions and deletions (indels) were found in exon sequences of WAG-2 from different species. More SNPs and indels occurred in introns than in exons. For exons, e
Genetics and Molecular Biology. Publicado em: 2011