Somaclonal Variation
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Variation for rice blast resistance in early somaclonal generations derived from immature panicles.
Somaclones derivados de paniculas imaturas das cultivares de arroz Bluebelle e Maratelli suscetiveis a brusone, e seus respectivos F1's de cruzamentos com doadores de resistencia (Araguaia, Basmati-370 e Ramtulasi) foram comparados em R2 (plantas obtidas de autofecundacao de sementes de regenerantes primarios) e na geracao R3, em casa de vegetacao e no campo
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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14. Padronização de metodologias de regeneração, via embriogênese somática e organogênese, e de aclimatização de soja (Glycine max (L.) Merrill) / Methodology standardization for regeneration via somatic embryogenesis and organogenesis and for acclimatization of soybean (Glycine max (L.) Merrill)
Different methodologies for in vitro regeneration have already been developed for several soybean cultivars. However, this species has proven to be recalcitrant to tissue culture and its in vitro morphogenetic response has been considered genotype dependent. Taking into account the need to develop reliable protocols for regeneration and acclimatization in so
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2010
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15. Estudos sobre indução, manutenção e estabilidade genética da calogênese in vitro de Caesalpinia echinata Lam. (Pau-brasil). / Studies on induction and maintenance of genetic stability in vitro organogenesis of Caesalpinia echinata Lam (Pau-Brazil).
A Caesalpinia echinata Lam (pau-brasil) foi protagonista do primeiro dos ciclos econômicos da história do Brasil, que contribuíram para a redução do bioma Mata Atlântica. A sua condição de espécie ameaçada de extinção (IUCN, 2008; BRASIL, 2008) se deve não só ao intenso extrativismo e à redução física de sua área de ocorrência, mas també
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2010
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16. DetecÃÃo de variantes somaclonais de bananeira âPrata AnÃâ (AAB) micropropagada / Detection of somaclonal variants of micropropagated banana plants âPrata Anaâ (AAB)
The in vitro culture, also known as micropropagation, is a technique used in the attainment of plants with commercial value. This technique is useful in achievement for free pathogenic plants and to maintain the genetic characteristics of the mother plant. However, the micropropagation can lead to phenotypic changes in the plants, known as somaclonal variati
Publicado em: 2007
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17. 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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18. GERMPLASM CHARACTERIZATION OF Arachis pintoi Krap. and Greg. (LEGUMINOSAEA)
Arachis pintoi Krap. and Greg. is a herbaceous, perennial legume, exclusively native to Brazil. It is considered a multiple use legume, being grown for forage; ground cover in fruits orchards, forest, and low tillage systems; erosion control; and ornamental purposes. Although several cultivars have been released in different countries, little is known about
Publicado em: 2004
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19. Somaclonal variation: a morphogenetic and biochemical analysis of Mandevilla velutina cultured cells
Cell cultures of Mandevilla velutina have proved to be an interesting production system for biomass and secondary metabolites able to inhibit the hypotensive activity of bradykinin, a nonapeptide generated in plasma during tissue trauma. The crude ethyl acetate extract of cultured cells contains about 31- to 79-fold more potent anti-bradykinin compounds (e.g
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-06
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20. Genetic instability of sugarcane plants derived from meristem cultures
The RADP (Random amplified polymorphic DNA) technique was used to detect tissue-culture-induced variations in sugarcane. Plants of the Brazilian variety RB83-5486 propagated via rhizomes and via meristem cultures were studied. The polymorphism rate for 98 RAPD loci was 6.93% when the plants derived from meristems. Besides, in order to evaluate the influence
Genetics and Molecular Biology. Publicado em: 2002
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21. Somaclonal variation for disease resistance in wheat and production of dihaploids through wheat x maize hybrids
Sete cultivares de trigo possuindo certo nível de resistência a Bipolaris sorokiniana, Magnaporthe grisea, Xanthomonas campestris pv. undulosa (Xcu), foram usadas para variação somaclonal, a fim de induzir um nível maior de resistência. A freqüência de indução de calos variou entre 69,4 e 100 entre as cultivares, enquanto que, a freqüência de reg
Genetics and Molecular Biology. Publicado em: 2000-09
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22. Alterações em genes de zeina induzidas por variação somaclonal
Somaclonal variation was observed in plants regenerated from type I calli established from a maize inbred line Cat100-6. One of the variants, S1587. was self-polinated, giving rise to different progenies. Considering the plant and seeds morphological alterations, one of the progenies, 81587-17. was selected for further studies of seed storage proteins, zeins
Publicado em: 1996
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23. Specific expression of the tobacco Tnt1 retrotransposon in protoplasts.
The Tnt1 transposable element of tobacco belongs to the retrotransposon family and shares the structural features of viral retroelements including two long terminal repeats (LTRs) which are known to contain promoter regions. We show that two Tnt1 RNAs of 5.2 and 6.5 kb can be found. The 5.2 kb RNA matches with the size of the Tnt1 elements so far isolated (5
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24. RFLP Analysis of Chromosomal Segregation in Progeny from an Interspecific Hexaploid Somatic Hybrid between Solanum Brevidens and Solanum Tuberosum
Segregation of restriction fragment length polymorphism (RFLP) loci was monitored to determine the degree of homeologous pairing and recombination in a hexaploid somatic hybrid, A206, the result of protoplast fusion between Solanum tuberosum (PI 203900, a tetraploid cultivated potato) and Solanum brevidens (PI 218228), a diploid, sexually incompatible, dista