赖草
披碱草属
小麦族
生物
植物
属
基因组
禾本科
遗传学
生态学
基因
草原
摘要
Elymus coreanus and Elymus californicus were studied to describe (1) their genomic composition and (2) correct taxonomic alignment based on genomic relationships. The hybrids E. coreanus x Psathyrostachys stoloniformis (NsNs), E. coreanus x Leymus ambiguus (NsNsXmXm), E. coreanus x Leymus salinus ssp. salmonis (NsNsXmXm), and E. coreanus x Leymus innovatus NsXmXm) averaged 5.80, 13.74, 13.15, and 13.58 bivalents per cell, respectively. Genome-specific RAPD assay results indicate that E. californicus and E. coreanus have the Ns genome but lack the St genome from the genus Pseudoroegneria and the Eb genome from the genus Thinopyrum. Therefore, these two species have the same genome constitution as other Leymus species and should be transferred to the genus Leymus. The following new name combination is proposed for Leymus coreanus (Honda) K. B. Jensen & R. R-C. Wang comb. nov., based on Elymus coreanus Honda (1930 [J. Fac. Sci. Univ. Tokyo 3, 3:17], cited in Love 1984). However, until further cytological data are available, the new name combination transferring E. californicus into Leymus will be made in a later publication.
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