Академическое издательство «Гео»

Key words: I Elymus macrourus /I, I Е. jacutensis, E. ircutensis



Rastitel'nyj Mir Aziatskoj Rossii (Plant Life of Asian Russia), 2008, № 2, p. 20-32

BIOSYSTEMATIC STUDY OF THE COMPLEX ELYMUS MACROURUSЕ. JACUTENSISAND THE CRITICAL TAXON E. IRCUTENSIS (TRITICEAE: POACEAE)

A.V. Agafonov

Central Siberian Botanical Garden, SB RAS, 630090 Novosibirsk, Zolotodolin-skaya st., 101
Fax: +7 (383) 330–19–86; e-mail: agalex@csbg.nsc.ru

Results of biosystematic study of the species of the complex Elymus macrourus E. jacutensis — E. ircutensis that is suggested to be called as the complex E. macrourus s.l. are presented. All taxa of the complex constitute a uniform recombination gene pool (RGP) within which the possibility of an exchange of genetic material is kept. On the basis of morphological, electrophoretic and hybridological data it has been shown that Е. jacutensis should be included in the complex as the variety E. macrourus var. jacutensis . In the Altai-Sayan Mountain Area there is a special race Rоegneria pubescens (Trin.) Nevski which earlier was assumed to be a synonym of E. jacutensis . According to its basic characteristics it should be considered as a subspecies within the complex. A typical her-barium specimen of E. ircutensis (type) and some biotypes collected in the classical habi-tat coincide with Roegneria pubescens by morphological characters.

Key words: Elymus macrourus , Е. jacutensis, E. ircutensis
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