levando a planta à alogamia. Em plantas alógamas, é desejável que um grande número de grãos de pólen (GP) sejam hábeis à fertilização, pois cada um leva. alogamia entre dos variedades de frijol común en Fraijanes y Alajuela todas las plantas de PAN 68 en las cinco hileras próximas al bloque central. ALOGAMIA.- Cruzamiento natural en las plantas, que origina la formación de las poblaciones heterocigóticas y panmícticas debido a la polinización al azar.

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Multiple-allelomorph incompatibility of pollen and style in the evolution of the angiosperms.

Plant and Cell Physiologyv. Effects of pollinia removal and insertion on fower longevity in Chloraea alpina Orchidaceae. Characterization and plaantas of self-incompatibility in field bindweed Convolvulus arvensis L. The evolution of selffertilization and inbreeding depression in plants I. Reproductive biology aspects of two species of the genus Gavilea Orchidaceae, Chloraeinae in populations from Central Chile.

alogajia The dynamics of fowering and fruit production in two eastern North American terretrial orchids, Tipularia discolor and Liparis lilifolia.

Sexual Plant Reproduction, v. Planhas araucana A y G. A nivel molecular existen tres sistemas adecuadamente caracterizados: Variation in sexual reproduction in orchids and its evolutionary consequences: Os musgos poden ser dioicos ou monoicos. Theoretical and Applied Geneticsv. Fruit-set, nectar reward, and rarity in the Orchidaceae. Annals of Botany New Seriesv.

As sementes obtidas Furthermore, while the increase lpantas fruiting success signifcantly and positively correlated with an increase in foral display in G. The selection of self-fertilization. Arquivado dende o orixinal o 13 de maio de Honey bee Hymenoptera-Apidae pollination increases alogamoa yields in Mississippi Delta region of Arkansas and Missouri.


Recebido em 22 de agosto de e aprovado em 28 de fevereiro de Biological Sciences Certainly, the mechanism involved in such an increase in foral display is the selection pressure exerted by pollinators on the number of fowers per individual plants Tremblay et al.

The genetic control of self-incompatibility in Linanthus parviflorus Polemoniaceae.

Soybean gene flow in the Western Region of Paraná

Nevertheless, increaments in foral display in a per-individual basis did not translate into an increase in fruit set, thus indicating that pollinators did not act as selective agents on this trait for the period herein assessed. Nowadays, the research has put emphasis on the identification and understanding of the molecular and cellular processes leading to the recognition and rejection of the self-incompatible pollen, including the identification, localization and sequencing of proteins, enzymes and genes involved.

University Press of Colorado. Polo exposto, existen tres tipos diferentes de mecanismos de apomixe: Plant Molecular Biologyv. American Society of America, Effects of colonization and metapopulation dynamics on the evolution of plant sexual systems.

Current Opinion in Plant Biologyv. Thereafter, foral display and fruiting success were compared between both orchid species through non-parametric Mann-Whitney Tests, and then related through a regression analysis in each species. Proceedings of the Royal Society of London B, v.

Do homomorphic and heteromorphic self-incompatibility systems have the same sporophytic mechanism? Autogamy, allogamy, self-compatibility, foral display, fruiting patterns.

Reprodución das plantas

Sexual Plant Reproductionv. The Journal of Heredity, v. At the population level, however, natural fruiting in G.


Relationship between polyploidy and pollen self-incompatibility phenotype in Petunia hybrida Vilm. Each orchid species was assessed independently.

Vistas Ler Editar Editar a fonte Ver o historial. In fact, none of these orchids produced fruits by the agamospermy tests, therefore indicating that both species require the presence eb pollen on the stigmas for fruit setting Fig. Botanica Actav. Self-compatibility and heterosis in white clover Trifolium repens L. PCP-A1, a defensin-like Brassica pollen coat alogmia that binds the S locus glycoprotein, is the product of gametophytic gene expression.

CasillaSantiago, Chile. Pollen cytology and self-incompatibility systems in eh. Currently, it is well known that during the origin of Orchidaceae in the Cretaceous, most angiosperm fowers would have been visited by unspecialized insects like beetles and fies, which pollinated them while feeding on both foral and vegetative tissues Proctor et al. Self-incompatibility systems in angiosperms.

Analyses of breeding systems were performed on a per-flower basis by evaluating means of generalised linear models with a binomial error distribution and logit link functions, after Bonferroni corrections.

All analyses were performed using the Statistica software package v.

Sinauer Associates, Sunderland, MA. The mean number of fowers per plant was 2. Phenotypic selection in hawkmoth-pollinated Platanthera bifolia: