self-incompatibility


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self-incompatibility

a condition in plants where certain types of pollen will not form pollen tubes when deposited on the female stigma, thus preventing fertilization. Self-incompatibility prevents self-fertilization and promotes heterozygosity (the mixing of allelic forms). The system is controlled by an S locus with many alleles (see MULTIPLE ALLELISM), and pollen with the same allele as in the stigma will not germinate to form a pollen tube. This is shown in Fig. 279. Self-incompatibility mechanisms are much used to produce HYBRID plants (e.g. various Brassica crops). See also COMPATIBILITY.
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In hermaphrodites, self-incompatibility produces differences in fertilization success that are similar in magnitude to among-species crosses, which could result in fairly strong selection pressures against self-fertilization when non-self eggs are available.
Chemoattractant-Mediated Preference of Non-Self Eggs in Ciona robusta Sperm
Pollen tube growth was not interrupted in the cross-pollination treatment, in contrast to self-pollinated flowers, where pollen tube growth stopped in the stigma or in the style, identifying possible sites of pre-zygotic self-incompatibility.
Reproductive biology of endemic Solanum melissarum Bohs (Solanaceae) and updating of its current geographic distribution as the basis for its conservation in the Brazilian Cerrado/Biologia reprodutiva da endemica Solanum melissarum Bohs (Solanaceae) e atualizacao da distribuicao geografica atual, como base para a sua conservacao no Cerrado Brasileiro
Macrophylogenetic analyses of the gain and loss of self-incompatibility in the Asteraceae.
Pollination and reproductive biology in a hill prairie population of Nothocalais cuspidata (Asteraceae: cichorieae)
Some studies have, however, found no differences in outcrossing rate in populations of different size or density, particularly in species with a strong self-incompatibility mechanism (Cascante et al.
Several small: how inbreeding affects conservation of Cariniana legalis Mart. Kuntze (Lecythidaceae) the Brazilian Atlantic forest's largest tree/Plusieurs petits: comment l'endogamie affecte la conservation de Cariniana legalis Mart. Kuntze (Lecythidaceae) le plus grand arbre de la Mata Atlantica/Varias pequenas: como afecta la endogamia a la conservacion de Cariniana legalis Mart...
Self-fertilization in passion fruit is hampered due to self-incompatibility.
Method for overcoming the passion fruit self-incompatibility/Metodo para superacao da autoincompatibilidade do maracujazeiro
Self-incompatibility in the threatened shrub Oleria adenocarpa (Asteraceae).
Seed characters and their usefulness in the separation of Asteraceae species/Caracteres de sementes e sua utilidade na separacao de especies de Asteraceae
dominant self-incompatibility inhibitor (De Jong et al., 1971).
Systematics, diversity, genetics, and evolution of wild and cultivated potatoes
Identification of random amplified polymorphic DNA (RAPD) markers for self-incompatibility alleles in hazelnut.
MOLECULAR CHARACTERIZATION OF TURKISH HAZELNUT CULTIVARS AND ACCESSIONS
In flowering plants (also called angiosperms), an intraspecific reproductive mechanism, self-incompatibility (SI), has so far been widely known.
Sequence characterization and spatiotemporal expression patterns of Pb[S.sub.26]-RNase gene in Chinese white pear (Pyrus bretschneideri)
The gametophytic self-incompatibility (GSI) system in apple is controlled by a multiallelic single locus, called S-locus [13,14].
Apple pollination biology for stable and novel fruit production: search system for apple cultivar combination showing incompatibility, semicompatibility, and full-compatibility based on the S-Rnase allele database
mixta flower nectar production pattern, 3) how nectar robbing affects fruit and seed production and 4) self-incompatibility in this species.
Avian nectar robbers of Passiflora mixta (Passifloraceae): do they have a positive effect on the plant?/Aves ladronas de nectar de Passiflora mixta (Passifloraceae): ?Tienen efecto positivo en la planta?/Aves ladras de nectar de Passiflora mixta (Passifloraceae) Tem efeito positivo na planta?
specific goals were to determine: presence of spontaneous self-fertilization (i.e., breakdown of self-incompatibility) in three species, D.
Effectiveness of vectors of pollen and longevity of capitula for four species of Asteraceae in central Mexico

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