Diploids
Mostrando 13-24 de 452 artigos, teses e dissertações.
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13. The karyotype of Nothoscordum arenarium Herter (Gilliesioideae, Alliaceae) : a populational and cytomolecular analysis
The genus Nothoscordum Kunth comprises approximately 20 species native to South America. Karyologically, the genus is remarkable for its large chromosomes and Robertsonian translocations. Variation in chromosome number has been recorded in a few polyploid species and it is unknown among diploids. This study presents the chromosome number and morphology of 53
Publicado em: 2010
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14. Avaliação in silico do transcriptoma do café : identificação de SNPs e inferência de mecanismos de regulação da expressão gênica / In silico analysis of the coffee transcriptome : identification of SNPs and inference of mechanisms of gene expression regulation
Coffee is one of the most important crops in the world, being worldwide consumed and having significant participation in under development economies. Coffea arabica and Coffea canephora are responsible for 70% and 30% of commercial production, respectively. Cytogenetic analysis established that C. arabica is an autogamous alotetraploid formed by a recent (1
Publicado em: 2010
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15. Genetic diversity of carotenoid-rich bananas evaluated by Diversity Arrays Technology (DArT)
The aim of this work was to evaluate the carotenoid content and genetic variability of banana accessions from the Musa germplasm collection held at Embrapa Cassava and Tropical Fruits, Brazil. Forty-two samples were analyzed, including 21 diploids, 19 triploids and two tetraploids. The carotenoid content was analyzed spectrophotometrically and genetic variab
Genetics and Molecular Biology. Publicado em: 30/01/2009
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16. The karyotype of Nothoscordum arenarium Herter (Gilliesioideae, Alliaceae): a populational and cytomolecular analysis
The genus Nothoscordum Kunth comprises approximately 20 species native to South America. Karyologically, the genus is remarkable for its large chromosomes and Robertsonian translocations. Variation in chromosome number has been recorded in a few polyploid species and it is unknown among diploids. This study presents the chromosome number and morphology of 53
Genetics and Molecular Biology. Publicado em: 23/01/2009
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17. PRODUTIVIDADE, MORFOGÊNESE E ESTIMATIVA DA TEMPERATURA BASE PARA GENÓTIPOS DIPLÓIDES E TETRAPLÓIDES DE AZEVÉM / PRODUCTIVITY, MORPHOGENESIS AND LOWER BASE TEMPERATURE OF DIPLOID AND TETRAPLOID RYEGRASS GENOTYPES
New genotypes of ryegrass of other localities and with desirable characteristics are being commercialized as tool to reach better zoothenic performance indices. However, research must be carried through on its potentiality in the place to be implanted, searching to prevent problems in the growth and development of these fodder plants, compromising potential
Publicado em: 2009
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18. Autotetraploidy induction and identification in banana (Musa spp.) / INDUÃÃO E IDENTIFICAÃÃO DE POLIPLOIDIA EM Musa acuminata, Colla
The aimed study to induct and to identify polyploidys identification through stomatal analysis, chromosome counting and flow cytometry, as well polyploidys and mixoploids effects on the structural and ultrastructural characteristics in banana varieties: Malbut, Ouro, Lidi e Thong Dok Mak. In polyploidys induction, explants were treated with concentrations of
Publicado em: 2008
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19. Chromosomal and morphological studies of diploid and polyploid cytotypes of Stevia rebaudiana (Bertoni) Bertoni (Eupatorieae, Asteraceae)
In this study, we examined the chromosome number and some morphological features of strains of Stevia rebaudiana. The chromosomes were analyzed during mitosis and diakinesis, and the tetrad normality and pollen viability were also assessed. In addition, stomata and pollen were measured and some plant features were studied morphometrically. All of the strains
Genetics and Molecular Biology. Publicado em: 2004
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20. DISTRIBUIÇÃO DA VARIABILIDADE GENÉTICA EM POPULAÇÕES NATURAIS DE Baccharis trimera (Less) DC. (CARQUEJA) NO SUL DO BRASIL. / GENETIC VARIABILITY DISTRIBUTION IN NATURAL POPULATIONS OF Baccharis trimera (Less) DC. (CARQUEJA) IN SOUTHERN BRAZIL
Carqueja (Baccharis trimera) is a native plant from South America, occurs in several settings, it is highly employed in popular medicine, and has been explored under a grasping way. This study had the purpose of producing information for the establishment of adequate strategies to the conservation of genetic resources of this specie. Assuming this, one searc
Publicado em: 2004
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21. Avaliação da variabilidade genética em Musa spp. utilizando marcadores microssatélites. / Evaluation of genetic variability in musa spp. using microsattelite markers.
The banana (Musa) industry has faced various disease and pest problems all over the world, and the development of resistant cultivars is the most attractive way of control. Promising tetraploid hybrids, derived from crosses between triploid cultivars and wild, cultivated or selected diploids, have been developed from different breeding programs. However, the
Publicado em: 2002
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22. The genetic study of sterigmatocystin production in Aspergillus nidulans. / Estudo genético da produção de esterigmatocistina em Apergillus nidulans.
Sterigmatocystin (ST) is a polyketide produced by different species of Aspergillus as well as by other fungus genera such as Bipolaris and Chaetomium. This toxin is characterized as a bifuranoxanthone, whose molecular formula is C18H12O6 and which is frequently found as a contaminant in several food products such as oil-seed grains and cereals. It has carcin
Publicado em: 1999
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23. Analise genetica da produção de lipidios de aspergillus nidulans
Three auxotrophics mutants of A.nidulans were crossed among themselves as result we obtained three diploids. From the diploid MSE // pro A1; paba A6; y A1 were obtained nine sectors by haploidization. The haploids strains were cultivated in a complete medium and in a minimum supplemented medium. The diploids were grown in a minimum and the segregates grew in
Publicado em: 1989
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24. Isolamento e analise genetica de mutantes de Aspergillus niger com aumento na produção de amiloglicosidase
The aim of this work was the isolation and genetical analysis of mutants with increased amyloglucosidase production using the pab1fwn1 strain of Aspergillus Niger. The mutagenic used was ultraviolet light that showed efficiency in the induction of this type of mutant, which could be isolated after some modifications in the methodology used by VALENT (1985).
Publicado em: 1988