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Article
Published: 2018-12-10

Chenopodium luteorubrum (Chenopodiaceae/Amaranthaceae sensu APG): a remarkable new species from the Russian Far East

Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha 6 – Suchdol, CZ-165 21, Czech Republic The Czech Academy of Sciences, Institute of Botany, Zámek 1, CZ-252 43, Průhonice, Czech Republic
Central Siberian Botanical Garden, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
M.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, Tereshchenkivska Street 2, Kyiv (Kiev), 01004, Ukraine
allopolyploidy Chenopodium genome composition hybridisation Russian Far East Eudicots

Abstract

Chenopodium luteorubrum is described as a new species of Chenopodiaceae (Amaranthaceae sensu APG) from coastal habitats along the Sea of Japan in the Russian Far East. It has been demonstrated that this allohexaploid species (2n = 6x = 54) combines in its genome the subgenomes ‘A’ (closely related to or inherited from C. bryoniifolium), ‘C’ (unknown or extinct species), and ‘D’ (C. acuminatum s. l.). That subgenome combination is unique; it differs from the combination in C. album s. str. and closely related hexaploid taxa, which have ‘B’ (derived from C. ficifolium/C. suecicum), ‘C’, and ‘D’ subgenomes. Here we describe and illustrate the new species and provide information on its evolution, ecology, morphology, karyology, and distribution. The new species is compared with morphologically somewhat similar taxa C. album s. str. (hexaploid),
C. suecicum (diploid), C. betaceum s. l. (C. strictum auct., tetraploid), and C. acuminatum (diploid).