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	Provedor de dados Ciência Rural (2) Electron. J. Biotechnol. (1) Genet. Mol. Biol. (1) PAB (1) Planta Daninha (1) Autor Cepkova,Petra Hlasna (2) Eliasova,Katerina (2) Pozzobon,Marisa Toniolo (2) Santos,Sileuza dos (2) Valls,José Francisco Montenegro (2) Viehmannova,Iva (2) Vitamvas,Jan (2) Bortlova,Zuzana (1) Côrtes,Ana Luiza (1) ELIAS,H. (1) HAMID,H.A.A. (1) MAHMAD,N. (1) Machado,Ana Caroline de Carvalho (1) Mrhalova,Hana (1) Paganella,Marcelo Broilo (1) Peñaloza,Andréa del Pilar de Souza (1) Pozzobon,Marisa T. (1) Rua,Gabriel Hugo (1) SALEH,A. (1) Svobodova,Eva (1) Mais... Palavra-chave Ploidy level (6) Agronomic parameters (1) Arracacha (1) Chromosome (1) DNA polymorphism (1) Diploid (1) Genetic resources (1) Grass (1) Hybrid (1) ISSR (1) Mitotic index (1) Mode of reproduction (1) Molecular markers (1) Oryza sativa L. cv. MRQ 74 (1) P. modestum (1) P. palustre (1) Paspalum hydrophilum (1) Plant breeding (1) Plant growth hormones (1) Polyploid (1) Mais... Tipo do documento Info:eu-repo/semantics/article (5) Journal article (1) Ano 2019 (2) 2014 (1) 2013 (1) 2008 (1) 2003 (1) País Brazil (5) Chile (1) Idioma Inglês (6)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 6 Primeira ... 1 ... Última Cytological and reproductive aspects in the Caespitosa group of Paspalum Ciência Rural Pozzobon,Marisa Toniolo; Paganella,Marcelo Broilo; Santos,Sileuza dos; Valls,José Francisco Montenegro. Somatic chromosome numbers are reported for thirty four germplasm accessions of Paspalum, Caespitosa group, representing five different species. All five species have shown x=10 as the basic chromosome number. The diploid 2n=20 chromosome number was confirmed for P. chacoense and P. indecorum, as well as sexuality for the latter. This is the first report of the chromosome number and cytological behavior for P. ligulare (2n=20 and 40), P. pleostachyum (2n=20, 30 and 40) and P. redondense (2n=20 and 40). The present results document regular meiosis in diploid accessions, with primarily bivalent pairing at diakinesis and metaphase I. Polyploids of these species had irregular meiosis, with univalent, trivalent, and quadrivalent chromosome associations. Diploid... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mode of reproduction; Ploidy level. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001100014 Cytogenetic analyses in Paspalum L. reveal new diploid species and accessions Ciência Rural Pozzobon,Marisa Toniolo; Machado,Ana Caroline de Carvalho; Vaio,Magdalena; Valls,José Francisco Montenegro; Peñaloza,Andréa del Pilar de Souza; Santos,Sileuza dos; Côrtes,Ana Luiza; Rua,Gabriel Hugo. Chromosome numbers were counted in 126 new accessions of 50 Paspalum species from Brazil, Argentina, Paraguay and Bolivia. The chromosome numbers 2n=12, 20, 24, 30, 40, 50, 60, 80 were confirmed. Chromosome numbers for P. arenarium (2n=20), P. barretoi (2n=20), P. aff. ceresia (2n=40), P. corcovadense (2n=20), P. crispulum (2n=20), P. flaccidum (2n=40), P. nummularium (2n=20), P. scalare (2n=20), P. vescum (2n=20) and P. rectum (2n=20) and a diploid cytotype of P. malacophyllum are reported for the first time. The predominance of tetraploid accessions (43.6%) was confirmed, but an unusually high number of diploid species (44%) and accessions (35.7%) was found. These results open new perspectives for breeding programs, phylogenetic studies, and for research... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome; Diploid; Polyploid; Ploidy level; Hybrid; Genetic resources. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000500014 Assessment of somaclonal variation in somatic embryo-derived plants of yacon [Smallanthus sonchifolius (Poepp. and Endl.) H. Robinson] using inter simple sequence repeat analysis and flow cytometry Electron. J. Biotechnol. Viehmannova,Iva; Bortlova,Zuzana; Vitamvas,Jan; Cepkova,Petra Hlasna; Eliasova,Katerina; Svobodova,Eva; Travnickova,Martina. Background Yacon (Smallanthus sonchifolius) is a root crop native to the Andean region. Low sexual reproductive capacity is a major constraint facing the genetic breeding of this crop. Biotechnological techniques offer alternative ways to widen genetic variability. We investigated somaclonal variation in regenerants of yacon derived from in vitro somatic embryogenesis using simple sequence repeat (ISSR) analysis and flow cytometry. Results Twenty tested ISSR primers provided a total of 7848 bands in 60 in vitro regenerants and control plant. The number of bands for each primer varied from 3 to 10, and an average of 6.95 bands was obtained per ISSR primer. Eight primers were polymorphic and generated 10 polymorphic bands with 7.19% mean polymorphism. ISSR... Tipo: Journal article Palavras-chave: DNA polymorphism; Molecular markers; Ploidy level; Proembryogenic callus. Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000200008 Chromosome number in Brazilian germplasm accessions of Paspalum hydrophilum, P. modestum and P. palustre (Gramineae; Paniceae) Genet. Mol. Biol. Pozzobon,Marisa T.; Valls,José F.M.. This paper compiles results of chromosome counts of Paspalum hydrophilum, P. modestum and P. palustre. Four Brazilian accessions of P. modestum have shown 2n = 2x = 20 chromosomes, a number already found in one accession from Argentina and in two from Brazil. Three other Brazilian accessions showed tetraploid level (2n = 4x = 40), which was previously unknown in this species. In P. hydrophilum, only one of the accessions analyzed presented tetraploid level, initially established for the species from plants collected in Argentina. Five additional accessions from Brazil showed the diploid number, previously detected in a single Brazilian population. A tetraploid cytotype was found in P. palustre, previously known as a diploid species. In addition to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Grass; Ploidy level; Paspalum hydrophilum; P. modestum; P. palustre. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300023 Assessment of somaclonal variation in indirect morphogenesis-derived plants of Arracacia xanthorrhiza PAB Vitamvas,Jan; Viehmannova,Iva; Cepkova,Petra Hlasna; Mrhalova,Hana; Eliasova,Katerina. Abstract: The objective of this work was to induce and detect somaclonal variation in arracacha (Arracacia xanthorrhiza) plants regenerated via indirect morphogenesis, in order to evaluate the potential of this technique to produce new genotypes for breeding purposes of this crop. Calli were induced from petiole segments on Murashige & Skoog (MS) medium supplied with 0.1 mg L-1 2,4-dichlorophenoxyacetic acid. The regeneration of plants via indirect morphogenesis was carried out on half-strength MS medium without plant growth regulators. Fifteen randomly chosen plants were subjected to flow cytometry and “inter-simple sequence repeat” (ISSR) analysis. Ploidy level remained stable in all tested regenerants (2n=4x=44), with no changes in the genome.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Arracacha; ISSR; Plant breeding; Ploidy level; Somatic embryogenesis. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102200 Detection of Somaclonal Variation in Micropropagated and Acclimatized Plantlets of Oryza sativa MRQ 74 from Stem Explants Planta Daninha SALEH,A.; TAHA,R.M.; MAHMAD,N.; ELIAS,H.; HAMID,H.A.A.. ABSTRACT: In plant tissue culture system, the excessive supply of plant growth hormones may inhibit further growth and development of the regenerants and sometimes it may induce somaclonal variation. In this study, the optimum concentration of plant growth hormones for in vitro regeneration of Oryza sativa L. cv. MRQ 74 was identified and subsequently the occurrence of somaclonal variation of regenerated plantlets was determined through cytological analysis of in vivo and in vitro grown plantlets. MS media supplemented with 0.1 mg L-1 BAP in combination with 0.1 mg L-1 NAA was found to be the optimum concentration for shoots and roots induction of Oryza sativa L. cv. MRQ 74. Plantlets derived from MS media supplemented with 0.5 mg L-1 2,4-D showed higher... Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant growth hormones; Oryza sativa L. cv. MRQ 74; Survival rate; Agronomic parameters; Mitotic index; Ploidy level. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100212 Registros recuperados: 6 Primeira ... 1 ... Última

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