Browsing Masters Theses by Subject "QK495.G74"

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MicroRNAs contribute to enhanced salt adaptation of the autopolyploid Hordeum bulbosum compared to its diploid ancestor

Liu, Beibei (Halifax, N.S. : Saint Mary's University, 2017)

Several studies have shown that autopolyploid species can tolerate abiotic stresses better than their diploid ancestor. However, the underlying molecular mechanism is poorly understood. Whole genome duplication can result ...
Molecular characterization of the St genome in Pseudoroegneria species and their relationships to the Y genome in Elymus species, and origin of Elymus caninus

Yan, Chi (Halifax, N.S. : Saint Mary's University, 2011)

Although five basic genomes (St, H, Y, P and W ) have so far been identified in species of the genus Elymus , the origin of the Y genome in species with an StY genome is still unknown and under debate. Previous studies ...
Molecular diversity and relationship of Elymus species

Ni, Yan (Halifax, N.S. : Saint Mary's University, 2007)

Classification of the tribe Triticeae has been a longstanding problem, especially the treatment of the genus Elymus. The taxonomy of Elymus is extremely complex because of the huge morphological variation within and between ...
Molecular phylogeny and origins of Hordeum polyploid species

Alkhilafi, Shaza (Halifax, N.S. : Saint Mary's University, 2014)

The genus Hordeum in the tribe Triticeae comprises about thirty two species including diploids and polyploids. Although the phylogeny of diploid Hordeum species has been studied intensively, there have been incongruences ...
Molecular phylogeny of Elymus alaskanus complex

Alobeid, Afnan (Halifax, N.S. : Saint Mary's University, 2017)

Elymus species have been ideal candidates for studying the evolution and polyploidy in plants because it has a worldwide distribution, great economic value, and has a complex genetic composition. Many studies have been ...
Molecular phylogeny of tetraploid Elymus species revealed by the DMC1 gene

Zhang, Xiaodi (Halifax, N.S. : Saint Mary's University, 2009)

Although the relationship of genera of Triticeae has been analyzed in many previous studies, polyploid genera have not been as extensively studied as diploid ones within a phylogenetic framework. The present study focuses ...
Molecular phylogeny of the genus Hordeum and origins of Hordeum polyploidy species

Wang, Huan (Halifax, N.S. : Saint Mary's University, 2011)

The phylogeny of the diploid species in the genus Hordeum has been studied intensively, however, there has been incongruences between nuclear and chloroplast datasets. In addition, the origins of polyploid species in Hordeum ...
Origin and evolutionary dynamic of Elymus ciliaris, E. pendulinus and E. longearistatus (Triticeae: Poaceae)

Hu, Qianni (Halifax, N.S. : Saint Mary's University, 2013)

Evidence accumulated over the last decade has shown that allopolyploid genomes may undergo complex reticulate evolution. Elymus, a genus with rampant interspecific hybridization, is an ideal model for examining the impact ...