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Breeding system variation in 10 evening primroses ( Oenothera sections Anogra and Kleinia ; Onagraceae)
Author(s) -
Theiss Kathryn E.,
Holsinger Kent E.,
Evans Margaret E. K.
Publication year - 2010
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.3732/ajb.0900260
Subject(s) - biology , taxon , evening primrose , onagraceae , oenothera , phylogenetic tree , zoology , ecology , botany , genetics , food science , gene
• Premise of the study: We examined two accounts of the relationship between breeding system and life history variation in a clade of evening primroses ( Oenothera , Onagraceae): (1) selection for reproductive assurance should generate an association between self‐compatibility and monocarpy and (2) phylogenetic conservatism leads to retention of breeding system and life history traits among closely related taxa. • Methods: We performed over 4000 hand pollinations under greenhouse conditions to determine the compatibility of 10 Oenothera taxa (sections Anogra [17 taxa] and Kleinia [2 taxa)] for which breeding systems had not previously been reported. We used generalized linear mixed models to evaluate the influence of pollination treatment, parents, and population on fruiting success. • Key results: Among the taxa tested, six were self‐incompatible, two were variable in compatibility, and two were self‐compatible. We combined these data with published studies in Anogra and Kleinia and mapped breeding system and life history onto a published phylogeny. • Conclusions: We found no evidence for phylogenetic conservatism, but detected considerable evolutionary lability in both traits. Additionally, we found no evidence for a consistent relationship between breeding system and life history. Only eight of 19 taxa followed the predicted association between self‐incompatibility and polycarpy vs. self‐compatibility and monocarpy. Instead, many taxa have retained self‐incompatibility, regardless of monocarpy or polycarpy.