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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Self-incompatibility SI is the failure of a fertile plant to set seeds when fertilized with its own pollen. 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. There are two types of SI, gametophytic GSI in which the pollen specificity is determined by the S allele of the pollen grain gametophyte haploid genome, and sporophytic SISwhere the pollen specificity is determined by the diploid genotype of the adult plant sporophyte that generated the pollen grain.
SIS may be homomorphic, when there are no floral modifications related to the SI process, or heteromorphic, when floral modifications occur together with the SI process. The SI reaction may occurr from pollen germination impairing up to pollen tube breakdown.
The existence of SI in economically important plants may be very important, being very positive in some cases or a burden in others, depending on the plant part harvested vegetative or reproductive and its mode of reproduction, sexual or asexual. SI has been employed in plant breeding for many years, but there is a gap between theoretical knowledge, such as genetic and molecular basis, and utilization in plant breeding programs.
Por exemplo, em trevo vermelho Trifolium pratense estima-se haver em torno de diferentes alelos enquanto o trevo branco teria em torno de alelos diferentes no loco S LAWRENCE, Existem casos de controle bifatorial e mesmo polifatorial da AIG. Existem diversos maneiras de superar a barreira da AI. Self-incompatibility systems in angiosperms. Molecular genetics of self-compatibility in flowering plants.
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Trends in Plant Sciencev. An association between variability in ovule development within ovaries and self-incompatibility in Lotus Leguminosae. Canadian Journal of Botanyv.
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Soybean gene flow in the Western Region of Paraná
The Plant Cell, v. Relationship between polyploidy and pollen self-incompatibility phenotype in Petunia hybrida Vilm.
Bioscience, Biotechnology and Biochemistryv. Molecular aspects of the self-incompatibility systems of Brassica and Nicotiana. Botanica Actav. Do homomorphic and heteromorphic sn systems have the same sporophytic mechanism? Plant Systematics and Evolutionv. The genetic control of self-incompatibility in Linanthus parviflorus Polemoniaceae. S-locus receptor kinase genes and self-incompatibility in Brassica napus. Signal transduction in plant growth and development.
Auxin modification of the incompatibility response in Theobroma cacao. Proceedings of the Royal Society of London Bv. Visualization of a self-incompatibility gene in Brassica alogamka L. Theoretical and Applied Geneticsv. Visualization of the Brassica self-incompatibility S-locus on identified oilseed rape chromosomes. Plant Molecular Biologyv.
Reprodución das plantas – Wikipedia, a enciclopedia libre
Sporophytic and gametophytic self-incompatibility. Population improvement in alfalfa: Number of incompatibility alleles in clover and other species Heredity, v. Controlling self-incompatibility by CO 2 gas treatment in Brassica campestris: Molecules and cells, v.
Genetic control of specificty and activity of the S antigen in plants.
Reprodución das plantas
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Sexual Plant Reproductionv. Self-compatibility and heterosis in white clover Trifolium repens L. Evolution of the Brassica self-incompatibility locus: Cell-cell signaling in the self-incompatibility response. Current Opinion in Plant Biologyv. Pollen-stigma signaling in the sporophytic self-incompatibility response. The Plant Cellv. Iowa State University, Style-specific self-compatible mutation caused by deletion of the S-Rnase gene in japanese pear Pyrus serotina.
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Plant and Cell Physiologyv. Alfalfa and alfalfa improvement. American Society of Agronomy, Characterization and breakdown of self-incompatibility in field bindweed Convolvulus arvensis L. The intracellular events triggered by the self-incompatibility response in Papaver rhoeas. Multiple-allelomorph incompatibility of pollen and style in the evolution of the angiosperms.
Annals of Botany New Seriesv. All the contents of this journal, except aloyamia otherwise noted, is licensed under a Creative Commons Attribution License. Services on Demand Journal. How to cite this article.