Topic
Leymus salinus
About: Leymus salinus is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 52 citations.
Papers
TL;DR: Morphological studies of populations belonging to three taxa of Leymus revealed that L.Salinus comprises L. salinus and L. salmonis, which are geographically separated and distinct from both these taxa and restricted to the Colorado Front Range.
Abstract: Morphological studies of populations belonging to three taxa of Leymus revealed that L. salinus comprises L. salinus subsp. salinus and L. salinus subsp. salmonis. These subspecies are geographically separated: subsp. salinus occurs in eastern Utah, northern Arizona, southwestern Wyoming, and western Colorado whereas subsp. salmonis occurs in Idaho, Nevada, and western Utah. Leymus ambiguus is distinct from both these taxa and is restricted to the Colorado Front Range. Both tetraploid (2n = 28) and octoploid (2n = 56) plants occur in L. salinus subsp. salinus and L. ambiguus, but only tetraploids were found in L. salinus subsp. salmonis. One population of L. salinus subsp. salinus included a natural hexaploid (2n = 42), the first such record for this taxon.
10 citations
TL;DR: The natural hybrids between E. elymoides and L. salmonis will have little impact on the native vegetation of the western deserts of Utah and, without restored fertility, has no potential as a restoration grass on semiarid range sites.
Abstract: Several putative hybrids between Elymus elymoides (Rafin.) Sweezey and Leymus salinus (M.E. Jones) A. Love subsp. salmonis (C. Hitchc.) Atkins were found growing on the west side of the Great Salt Lake, near Lakeside, UT in 1995. Naturally occurring hybrids between these two species have not been documented previously. Cytological, morphological, and chloroplast DNA analysis of the hybrids and parents confirmed the hypothesis that these plants were hybrids of the two species. Elymus elymoides and L salinus subsp. salmonis were the only Triticeae species growing in the area that could have contributed to the intermediate morphological features expressed in the hybrids. Leymus salinus subsp. salmonis (NsNsXmXm; 2n = 4x = 28) and E. elymoides (StStHH; 2n = 4x = 28) are allotetraploids that regularly formed 14 bivalents at metaphase I (MI). The hybrids between the two spedes are also tetraploids and averaged 22.1 univalents and 2.86 bivalent associations per cell at MI. Chromosome pairing in the hybrids suggests essentially no homology between the chromosomes from the two parents; thus the genomic formula for the hybrid can be written as StHNsXm. The hybrids were morphologically intermediate between the suspected parent species, but they resembled L. salinus subsp. salmonis more closely than E. elymoides. Analysis of chloroplast DNA in the hybrid and its putative parents, demonstrates cytoplasmic DNA identical to E. elymoides, suggesting that E. elymoides was the maternal parent. Complete sterility and reduction in chromosome pairing in the natural hybrids between E. elymoides and L. salinus subsp. salmonis suggest that the potential for genetic exchange between the two species is limited or lacking. Due to hybrid sterility, the natural hybrid will have little impact on the native vegetation of the western deserts of Utah and, without restored fertility, has no potential as a restoration grass on semiarid range sites.
5 citations
TL;DR: Salina wildrye (Leymus salinus) is a perennial cool-season grass that potentially could become an important restoration species in the Colorado Plateau, but its seed production has never been commercially viable due to sparse heading.
1 citations
TL;DR: 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 fromthe genus Thinopyrum, therefore, these two species have the same genome constitution as other Leymus species and should be transferred to the genusLeymus.
Abstract: 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 dat...
Performance Metrics
| Year | Papers |
|---|---|
| 2018 | 1 |
| 1999 | 1 |
| 1997 | 1 |
| 1984 | 1 |