Gametophytic self-incompatibility in Lycium parishii (Solanaceae): allelic diversity, genealogical structure, and patterns of molecular evolution at the S-RNase locus

Heredity
A E Savage, Jill S Miller

Abstract

We characterized allelic diversity at the locus controlling self-incompatibility (SI) for a population of Lycium parishii (Solanaceae) from Organ Pipe National Monument, Arizona. Twenty-four partial sequences of S-RNase alleles were recovered from 25 individuals. Estimates of allelic diversity range from 23 to 27 alleles and, consistent with expectations for SI, individuals are heterozygous. We compare S-RNase diversity, patterns of molecular evolution, and the genealogical structure of alleles from L. parishii to a previously studied population of its congener L. andersonii. Gametophytic SI is well characterized for Solanaceae and although balancing selection is hypothesized to be responsible for high levels of allelic divergence, the pattern of selection varies depending on the portion of the gene considered. Site-specific models investigating patterns of selection for L. parishii and L. andersonii indicate that positive selection occurs in those regions of the S-RNase gene hypothesized as important to the recognition response, whereas positive selection was not detected for any position within regions previously characterized as conserved. A 10-species genealogy including S-RNases from a pair of congeners from each of five g...Continue Reading

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Citations

Apr 13, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Nora M CaseyDaniel Thorogood
Oct 28, 2008·Journal of Molecular Evolution·J R CavatortaM M Jahn
May 21, 2010·BMC Evolutionary Biology·Marshall L HayesMichael E Hellberg
Aug 23, 2011·BMC Evolutionary Biology·Timothy Paape, Joshua R Kohn
Apr 26, 2011·Genetics·Camille E GervaisSylvain Billiard
Mar 5, 2008·Evolution; International Journal of Organic Evolution·Jill S MillerNatalie M Feliciano
Dec 17, 2014·Molecular Genetics and Genomics : MGG·Lauís Brisolara-CorrêaLoreta Brandão de Freitas
Aug 24, 2013·Annals of Botany·Donald A Levin
Sep 14, 2017·Scientific Reports·Ioannis PitsiosRoberto Osellame
Aug 6, 2019·Frontiers in Plant Science·Jorge VieiraCristina P Vieira

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