Unilateral incompatibility within the Brassicaceae: further evidence for the involvement of the self-incompatibility (S)-locus

Unilateral pollen-pistil incompatibility within the Brassicaceae has been re-examined in a series of interspecific and intergeneric crosses using 13 self-compatible (SC, Sc) species and 12 self-incompatible (SI) species from ten tribes. SC x SC crosses were usually compatible, SI x SC crosses showed...

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Bibliographic Details
Published in:Theoretical and applied genetics 1993-07, Vol.86 (6), p.744-753
Main Authors: Hiscock, S.J. (Department of Plant Sciences, Oxford (United Kingdom)), Dickinson, H.G
Format: Article
Language:English
Subjects:
AUTOESTERILIDAD
AUTOSTERILITE
Biological and medical sciences
BRASSICA OLERACEA
Brassicaceae
Classical genetics, quantitative genetics, hybrids
Fundamental and applied biological sciences. Psychology
GENE
GENES
Genetics of eukaryotes. Biological and molecular evolution
HEREDITE
HERENCIA GENETICA
LOCI
LOCUS
Pteridophyta, spermatophyta
Self-incompatibility
Unilateral incompatibility
Vegetals
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Summary:Unilateral pollen-pistil incompatibility within the Brassicaceae has been re-examined in a series of interspecific and intergeneric crosses using 13 self-compatible (SC, Sc) species and 12 self-incompatible (SI) species from ten tribes. SC x SC crosses were usually compatible, SI x SC crosses showed unilateral incompatibility, while SI x SI crosses were often incompatible or unilaterally incompatible. Unilateral incompatibility (UI) is shown to be overcome by bud pollination or treating stigmas with cycloheximide -features in common with self-incompatibility. Treating stigmas with pronase prevents pollen tubes from penetrating the stigma in normally compatible intra-and interspecific pollinations. The results presented show that the presence of an incompatibility system is important in predicting the outcome of interspecific and intergenerie crosses and, combined with the physiological similarities between UI and SI, would suggest an involvement of the S-locus in UI.
ISSN:0040-5752
1432-2242
DOI:10.1007/bf00222665