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	Provedor de dados Bragantia (1) Rev. Bras. Bot. (1) Autor Granato,Laís Moreira (1) Pereira,T.N.S. (1) Pinto-Maglio,Cecília Alzira Ferreira (1) Ramos,Luis Carlos da Silva (1) Souza,M.M. (1) Palavra-chave Meiotic index (2) Microsporogenesis (2) Post-meiotic products (2) Chiasmata (1) Passion flower (1) Pollen viability (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2019 (1) 2011 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Meiotic behavior in wild and domesticated species of Passiflora Rev. Bras. Bot. Souza,M.M.; Pereira,T.N.S.. The meiotic behavior of fourteen Passiflora taxa was analyzed. The species were grouped according to the n value (6, 9 and 12) for statistical studies. Some species presented tetravalent associations or univalent chromosomes in diakinesis, bivalent formation prevailing. The qui-square test revealed significant differences in the chiasma frequency among species for n = 9 and n = 6 groups. There was predominance of interstitial chiasmata in almost all studied species. The n = 12 group was the only one whose meiotic behavior was considered similar due to the quantity of chiasmata per cell, tendency of interstitial chiasma localization. Some species presented meiotic irregularities, such as laggard and precocious chromosomes in meiosis I. In telophase II the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chiasmata; Meiotic index; Microsporogenesis; Passion flower; Post-meiotic products. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000100007 Relationship between meiotic instability and fertility in F2 generation Arabusta coffee plants Bragantia Granato,Laís Moreira; Ramos,Luis Carlos da Silva; Pinto-Maglio,Cecília Alzira Ferreira. ABSTRACT Parental plants, an F1 interspecific hybrid and the F2 generation from Arabusta coffee plants were investigated for meiotic behavior and viability of pollen to understand part of their reproductive biology that affects their possible use in coffee breeding programs. Both parental plants (C. canephora var. Robusta 4x and C. arabica var. dihaploid Bourbon Vermelho) showed a meiosis diploid-like behavior, despite presenting a small percentage of irregularities, just as occurred for the F1 Arabusta hybrid. On the other hand, all F2 plants showeda higher frequency of anomalies that compromised pollen viability. The highest meiotic indices were registered for three analyzed plants of the F2 generation, and the pollen viability tests revealed the highest... Tipo: Info:eu-repo/semantics/article Palavras-chave: Microsporogenesis; Meiotic index; Pollen viability; Post-meiotic products. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200215 Registros recuperados: 2 Primeira ... 1 ... Última

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