Type-6 Self Incompatibility (SI)
Overview
| Family | Poaceae |
| Genus | 780 (63 assembled genus) |
| Species | 12000 (132 assembled species) |
| SI type | Type-6 |
| SI genes | S-loci (HPS10, DUF247), Z-loci (HPS10, DUF247) |
Organism Image
Description
We classified poaceae SI as type-6 gametophytically controlled by two multiallelic and independent loci, S and Z. Taking S as an example, stamen-expressed transmembrane polypeptides containing a domain of unknown function 247 (DUF247) can specifically recognize the pistil-specific peptide HPS10, resulting in the rejection of the self pollen.
SI genes
Publication
Yang B, Thorogood D, Armstead I, Barth S. How far are we from unravelling self-incompatibility in grasses? New Phytol. 2008;178(4):740-753. doi: 10.1111/j.1469-8137.2008.02421.x.
Manzanares C, Barth S, Thorogood D, Byrne SL, Yates S, Czaban A, Asp T, Yang B, Studer B. A Gene Encoding a DUF247 Domain Protein Cosegregates with the S Self-Incompatibility Locus in Perennial Ryegrass. Mol Biol Evol. 2016 Apr;33(4):870-84. doi: 10.1093/molbev/msv335.
Herridge R, McCourt T, Jacobs JME, Mace P, Brownfield L, Macknight R. Identification of the genes at S and Z reveals the molecular basis and evolution of grass self-incompatibility. Front Plant Sci. 2022 Oct 18;13:1011299. doi: 10.3389/fpls.2022.1011299.
Rohner M, Manzanares C, Yates S, Thorogood D, Copetti D, Lübberstedt T, Asp T, Studer B. Fine-Mapping and Comparative Genomic Analysis Reveal the Gene Composition at the S and Z Self-incompatibility Loci in Grasses. Mol Biol Evol. 2023 Jan 4;40(1):msac259. doi: 10.1093/molbev/msac259.