Patterns of evolution at the gametophytic self-incompatibility Sorbus aucuparia (Pyrinae) S pollen genes support the non-self recognition by multiple factors model

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...

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Veröffentlicht in:Journal of experimental botany. - 1985. - 64(2013), 8 vom: 01. Mai, Seite 2423-34
1. Verfasser: Aguiar, Bruno (VerfasserIn)
Weitere Verfasser: Vieira, Jorge, Cunha, Ana E, Fonseca, Nuno A, Reboiro-Jato, David, Reboiro-Jato, Miguel, Fdez-Riverola, Florentino, Raspé, Olivier, Vieira, Cristina P
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
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
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500 |a Citation Status MEDLINE 
520 |a 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 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a S-RNase. 
650 4 |a SFBB 
650 4 |a Sorbus aucuparia 
650 4 |a gametophytic self-incompatibility 
650 4 |a molecular evolution 
650 4 |a positively selected amino acid sites 
700 1 |a Vieira, Jorge  |e verfasserin  |4 aut 
700 1 |a Cunha, Ana E  |e verfasserin  |4 aut 
700 1 |a Fonseca, Nuno A  |e verfasserin  |4 aut 
700 1 |a Reboiro-Jato, David  |e verfasserin  |4 aut 
700 1 |a Reboiro-Jato, Miguel  |e verfasserin  |4 aut 
700 1 |a Fdez-Riverola, Florentino  |e verfasserin  |4 aut 
700 1 |a Raspé, Olivier  |e verfasserin  |4 aut 
700 1 |a Vieira, Cristina P  |e verfasserin  |4 aut 
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773 1 8 |g volume:64  |g year:2013  |g number:8  |g day:01  |g month:05  |g pages:2423-34 
856 4 0 |u http://dx.doi.org/10.1093/jxb/ert098  |3 Volltext 
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