There is a rising interest of moving towards hybrid breeding in outcrossing species. Self-compatibility (SC), which occurs at low rates in self-incompatible species, could be used to develop inbred lines, a key requirement for hybrid breeding programs. In perennial ryegrass, the existence of SC independent from the self-incompatibility (SI) loci S and Z has been reported.

In this study, we used 98 F₂ individuals from a cross between a self-compatible ecotype and an individual of the VrnA mapping population that were tested with markers for two candidate linkage groups 3 and 5 as well as markers for candidate regions at the S and Z locus. We were able to determine a tentative location of a SC locus and tested the possible interaction to other loci involved in SI and SC. This information will help to fine map the SC locus, and for marker-assisted selection.

Citations

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Molecular genetic studies of self-incompatibility (SI) are the most accentuating part in the way of advancement of reproductive mechanisms in flowering plants. In the Brassicaceae plants, self-incompatibility has been mapped genetically to a single chromosomal location where several closely linked genes have been identified. Recently, various studies have provided a novel insight into the basis of specificity in the S-receptor kinase (SRK) and S-locus protein 11 or S-locus Cysteine-rich (SP11/SCR) interaction, the nature of the signaling cascade that culminates in the inhibition of ‘self’ pollen, and the physiological and morphological changes that are associated with transitions between the outbreeding and inbreeding modes of mating in the Brassicaceae. In this review, we discuss the current view of the molecular genetic aspects of the self-incompatibility in Brassicaceae.

Citations

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• Genetics Behind Sexual Incompatibility in Plants: How Much We Know and What More to Uncover?
  Sukanya Chakraborty, Smritikana Dutta, Malay Das
  Journal of Plant Growth Regulation.2023; 42(11): 7164.     CrossRef
• Assessment of genotypic variation and self-incompatibility in cauliflower (Brassica oleracea var. botrytis) genotypes
  
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