Different positively selected sites at the gametophytic self-incompatibility pistil S-RNase gene in the Solanaceae and Rosaceae (Prunus, Pyrus, and Malus) |
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Authors: | Vieira Jorge Morales-Hojas Ramiro Santos Raquel A M Vieira Cristina P |
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Institution: | (1) Instituto de Biologia Celular e Molecular (IBMC), University of Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal |
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Abstract: | In this work we perform a comparative study on the location of positively selected sites (those likely responsible for defining
specificity differences) at the S-RNase gene, the pistil component of the gametophytic self-incompatibility system. For Plantaginaceae and Rosaceae (Prunus and Pyrus/Malus) this is the first study of this kind. A clear sign of positive selection was observed for 13, 17, and 27 amino acid sites
in Solanaceae, Prunus, and Pyrus/Malus, respectively, using two different methodologies. In Plantaginaceae no clear positively selected sites were identified. Possible
reasons for this result are discussed. Indirect experimental evidence suggests that the identified positively selected amino
acid sites play a role in specificity determination. The percentage of positively selected sites is similar in Solanaceae
and Rosaceae but the location of those sites is different.
Electronic supplementary material The online version of this article (doi: ) contains supplementary material, which is available to authorized users.
Reviewing Editor: Dr. Martin Kreitman |
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Keywords: | Gametophytic self-incompatibility S-RNase Positive selection |
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