Patterns of evolution at the gametophytic self-incompatibility Sorbus aucuparia (Pyrinae) S pollen genes support the non-self recognition by multiple factors model
S-RNase-based gametophytic self-incompatibility evolved once before the split of the Asteridae and Rosidae. In Prunus (tribe Amygdaloideae of Rosaceae), the self-incompatibility S-pollen is a single F-box gene that presents the expected evolutionary signatures. In Malus and Pyrus (subtribe Pyrinae o...
| Veröffentlicht in: | Journal of experimental botany. - 1985. - 64(2013), 8 vom: 01. Mai, Seite 2423-34 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2013
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| Zugriff auf das übergeordnete Werk: | Journal of experimental botany |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't S-RNase. SFBB Sorbus aucuparia gametophytic self-incompatibility molecular evolution positively selected amino acid sites |
| Zusammenfassung: | S-RNase-based gametophytic self-incompatibility evolved once before the split of the Asteridae and Rosidae. In Prunus (tribe Amygdaloideae of Rosaceae), the self-incompatibility S-pollen is a single F-box gene that presents the expected evolutionary signatures. In Malus and Pyrus (subtribe Pyrinae of Rosaceae), however, clusters of F-box genes (called SFBBs) have been described that are expressed in pollen only and are linked to the S-RNase gene. Although polymorphic, SFBB genes present levels of diversity lower than those of the S-RNase gene. They have been suggested as putative S-pollen genes, in a system of non-self recognition by multiple factors. Subsets of allelic products of the different SFBB genes interact with non-self S-RNases, marking them for degradation, and allowing compatible pollinations. This study performed a detailed characterization of SFBB genes in Sorbus aucuparia (Pyrinae) to address three predictions of the non-self recognition by multiple factors model. As predicted, the number of SFBB genes was large to account for the many S-RNase specificities. Secondly, like the S-RNase gene, the SFBB genes were old. Thirdly, amino acids under positive selection-those that could be involved in specificity determination-were identified when intra-haplotype SFBB genes were analysed using codon models. Overall, the findings reported here support the non-self recognition by multiple factors model |
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| Beschreibung: | Date Completed 13.12.2013 Date Revised 04.01.2025 published: Print-Electronic GENBANK: KC701614, KC701615, KC701616, KC701617, KC701618, KC701619, KC701620, KC701621, KC701622, KC701623, KC701624, KC701625, KC701626, KC701627, KC701628, KC701629, KC701630, KC701631, KC701632, KC701633, KC701634, KC701635, KC701636, KC701637, KC701638, KC701639, KC701640, KC701641, KC701642, KC701643, KC701644, KC701645, KC701646, KC701647, KC701648, KC701649, KC701650, KC701651, KC701652, KC701653, KC701654, KC701655, KC701656, KC701657, KC701658, KC701659, KC701660, KC701661, KC701662, KC701663, KC701674, KC701675, KC701676, KC701677, KC701678, KC701679, KC701680, KC701681, KC701682, KC701683, KC701684, KC701685, KC701686, KC701687, KC701688, KC701689, KC701690, KC701691, KC701692, KC701693, KC701694, KC701695, KC701696, KC701697, KC701698, KC701699, KC701700, KC701701, KC701702, KC701703, KC701704, KC701705, KC701706, KC701707, KC701708, KC701709, KC701710, KC701711, KC701712 Citation Status MEDLINE |
| ISSN: | 1460-2431 |
| DOI: | 10.1093/jxb/ert098 |