@ARTICLE{TreeBASE2Ref20347,
author = {Nicholas Peter Tippery and Donald H. Les},
title = {Hybridization and systematics of dioecious North American Nymphoides (N. aquatica and N. cordata; Menyanthaceae)},
year = {2012},
keywords = {},
doi = {10.1016/j.aquabot.2012.08.003},
url = {http://},
pmid = {},
journal = {Aquatic Botany},
volume = {104},
number = {},
pages = {127--137},
abstract = {Outcrossing in the aquatic genus Nymphoides (about 50 species) is promoted by various sexual conditions including dimorphic heterostyly (most species) and dioecy (four species). In eastern North America, N. aquatica and N. cordata are dioecious sister species that differ only slightly by their adventitious root form, leaf texture, and overall size. Although these features distinguish most individuals, the occurrence of morphologically intermediate specimens within broadly overlapping geographic ranges often confounds their identification. Even though hybridization of these taxa has not been documented previously, the potential for gene flow between N. aquatica and N. cordata exists because of their similar floral morphology, reliance on outcrossing, and partial sympatry. We studied individuals collected across the ranges of N. aquatica and N. cordata, using nuclear (ITS) and chloroplast (matK/trnK) sequence data to better ascertain their distinctness and to investigate further the possibility of hybridization. Our results indicated that most individuals of N. aquatica and N. cordata were readily identifiable to one or the other species, and these corresponded to reciprocally monophyletic groups. However, molecular cloning revealed that some individuals collected within the sympatric range of N. aquatica and N. cordata were interspecific hybrids. These data are consistent with a taxonomic concept that accepts two morphologically distinct Nymphoides species that occasionally produce genetically and morphologically intermediate hybrids.}
}
Taxa for matrix 3724 of Study 12278
Citation title:
"Hybridization and systematics of dioecious North American Nymphoides (N. aquatica and N. cordata; Menyanthaceae)".
Study name:
"Hybridization and systematics of dioecious North American Nymphoides (N. aquatica and N. cordata; Menyanthaceae)".
This study is part of submission 12278
(Status: Published).
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