Abstract
Self-incompatibility is a genetically controlled mechanism which prevents inbreeding in plants (de Nettancourt, 1977). In many, but not all cases, it is controlled by a multi-allelic, single gene, the S-gene. The system operates to enhance outcrossing and to ensure that a plant is fertilized by a genetically distinct individual of the same species. There are two major types of self-incompatibility. The most widespread is gametophytic self-incompatibility which involves interaction of a product of the haploid genome of the male gametophyte (carried within the pollen grain) and a product of the diploid genome of the female tissue of the sporophyte, the pistil. In incompatible matings, as is the case when the S-allele carried by the haploid pollen matches either of the S-alleles present in the diploid style, pollen tube growth is arrested within the transmitting tract (Figure 1).
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Mau, SL., Bacic, A., Murfett, J., McClure, B., Anderson, M., Clarke, A. (1992). Molecular Genetics of Self-incompatibility inNicotiana alata . In: Ottaviano, E., Gorla, M.S., Mulcahy, D.L., Mulcahy, G.B. (eds) Angiosperm Pollen and Ovules. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-2958-2_12
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DOI: https://doi.org/10.1007/978-1-4612-2958-2_12
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