Open AccessParallel origins of apomixis in two diverged evolutionary lineages in tribe P otentilleae ( R osaceae)
Author(s) -
Dobeš Christoph,
Lückl Andrea,
Kausche Lea,
Scheffknecht Susanne,
Prohaska Dagmar,
Sykora Christina,
Paule Juraj
Publication year - 2015
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/boj.12239
Subject(s) - apomixis , biology , potentilla , parthenogenesis , parallel evolution , tribe , phylogenetic tree , evolutionary biology , genus , botany , zoology , ploidy , genetics , embryo , sociology , gene , anthropology
We synthesized the results from a flow cytometric seed screen and the literature to infer the phylogenetic origin and the geographical and taxonomic distribution of apomixis in tribe P otentilleae ( R osaceae). We distinguished between regular sexuality and apomixis, the zygotic and parthenogenetic origin of the embryo, and the pseudogamous (i.e. sexual) versus autonomous origin of the endosperm. The combined evidence provides information on reproductive modes for 11 genera and 120 species. For the first time records on reproductive mode are provided for the genus F arinopsis , 29 species (from five genera), and seven series of P otentilla . Regular sexuality was observed in A phanes , A rgentina , C omarum , D asiphora , D rymocallis , F arinopsis , F ragaria , H orkeliella , P otentilla , and S ibbaldia . Reliable evidence for apomixis is restricted to two evolutionary lineages of P otentilleae: the P otentilla core group and A lchemilla / A phanes . Early evolutionary divergence of these lineages (approximately 50 Mya), characterized by pseudogamous and autonomous apomictic seed formation, respectively, suggests parallel origins of apomixis. Apomixis is shown to be taxonomically widespread in the whole N orthern H emisphere distribution range of P otentilla , a pattern that is explained by hybrid transfer and repeated intercontinental dispersals. Taxonomic and geographical coverage is discussed with reference to species diversity centres of genera. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society , 2015, 177 , 214–229.