Consulta: creatorFacets:"Fajardo,Cristiane Gouvêa"
Registros recuperados: 4
Data/hora: 06/06/2024 01:26:00

Reproductive biology of Protium spruceanum (Burseraceae), a dominant dioecious tree in vegetation corridors in Southeastern Brazil
Provedor de dados: 88
Autores: Vieira,Fábio de Almeida; Appolinário,Vivette; Fajardo,Cristiane Gouvêa; Carvalho,Dulcinéia de.
We investigated the reproductive biology of Protium spruceanum (Benth.) Engler in vegetation corridors of secondary Atlantic forest in Lavras, southern Minas Gerais State, Brazil. The reproductive phenology was investigated fortnightly over a one year period. Floral biology studies involved pollen viability analysis, nectar production, stigmatic receptivity, pollen tube growth, visiting insect species and visit rates. The small, pale yellowish flowers (0.3-0.4 cm diameter) are functionally unisexual and organized in dense inflorescences (ca. 45 flowers). P. spruceanum presented annual flowering between September and November. Staminate flowers supplied a high percentage of viable pollen (90.6%) and relatively abundant nectar (x = 4.5 μL). Pistillate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dioecy; Floral visitors; Flowering; Fruiting; Secondary forest.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000400018

Genetic diversity of long-established populations of Elaeis guineensis jacquin (Arecaceae)
Provedor de dados: 94
Autores: Chagas,Kyvia Pontes Teixeira das; Freire,Ageu da Silva Monteiro; Pinheiro,Luciana Gomes; Fajardo,Cristiane Gouvêa; Vieira,Fábio de Almeida.
Abstract  This study aimed to estimate the genetic diversity of three Elaeis guineensis populations in Rio Grande do Norte state, as well as to verify the decreases in effective population size. The population with the highest polymorphism was MAT (Mata) with+ 57 loci (72%), followed by RIA (Riacho) with 54 loci (68%) and HOR (Horta) with 34 loci (43.03%). The RIA population was shown to be the most genetically diverse, with Nei (h = 0.28) and Shannon (I = 0.41) diversity indices. There was high genetic differentiation among populations (AMOVA, analysis of molecular variance = 42%), which was separated into three distinct genetic groups according to a Bayesian analysis. There was a significant population decrease (P &lt; 0.05) for the HOR population in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Molecular Marker; Bottleneck; ISSR; Conservation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000400801

Genetic diversity in natural populations of Hancornia speciosa Gomes: Implications for conservation of genetic resources
Provedor de dados: 64
Autores: Fajardo,Cristiane Gouvêa; Costa,Daniel Ferreira da; Chagas,Kyvia Pontes Teixeira das; Vieira,Fábio de Almeida.
ABSTRACT The continuing fragmentation of forests has been a threat to the maintenance of genetic resources. Genetic diversity is fundamental to the survival of species in natural environments in the long term, as well as being the basis for genetic improvement. The objective of this study was to evaluate the genetic diversity in natural populations of Hancornia speciosa and to contribute to the development of conservation strategies. We sampled 105 individuals of H. speciosa, distributed in seven populations. The ISSR (Inter-Simple Sequence Repeat) markers provided 70 loci, of which 81% were polymorphic. The mean genetic diversity of Nei (h) was 0.19, and the Shannon index (I) was 0.27. The h and I diversity indices ranged respectively from 0.16 to 0.24 in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apocynaceae; Genetic structure; Genetic bottleneck; ISSR; Mangabeira.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000600623

Characterization of interphase nuclei from triploid hybrids between Pennisetum purpureum Schumach and Pennisetum glaucum (L.) R. Br.
Provedor de dados: 64
Autores: Fajardo,Cristiane Gouvêa; Davide,Lisete Chamma; Pereira,Antônio Vander.
This study evaluated the structure and the volume of interphase nuclei from root meristems of the genotypes of napier grass (Pennisetum purpureum), pearl millet (Pennisetum glaucum) and hybrids resultant of such breeding. In napier grass, nuclei were areticulate. Both pearl millet and the triploid hybrid had semi-reticulate nuclei; also, the hybrid presented a small proportion (6%) of areticulate nuclei. Pearl millet had the highest averages of nuclear dimensions, such as volume, diameter and radius, followed by the interspecific hybrid and napier grass. There was no intraspecific variation for the type of nuclear structure, which indicates this feature is important for cytotaxonomic studies involving the genus Pennisetum. Results demonstrated that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Napier grass; Pearl millet; Interphase chromatin; Nuclear volume.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000500007