منابع مشابه
Multiple origins of polyploidy and the geographic structure of Heuchera grossulariifolia
Multiple origins of polyploidy from an ancestral diploid plant species were investigated using restriction site polymorphism and sequence variation in the chloroplast DNA (cpDNA) of Heuchera grossulariifolia (Saxifragaceae). Phylogenetic analysis indicated that autopolyploidy has arisen at least twice in the evolutionary history of this species and potentially up to as many as seven times. Thes...
متن کاملGene-Tree Reconciliation with MUL-Trees to Resolve Polyploidy Events.
Polyploidy can have a huge impact on the evolution of species, and it is a common occurrence, especially in plants. The two types of polyploids-autopolyploids and allopolyploids-differ in the level of divergence between the genes that are brought together in the new polyploid lineage. Because allopolyploids are formed via hybridization, the homoeologous copies of genes within them are at least ...
متن کاملOrigins of Neutrino Events with Three Muons*
The experimental observation of events in neutrino scattering with three outgoing muons presents a potential challenge to SU2 x U1 gauge models, depending on the source of such events. In this paper a comprehensive study is reported of four possible modes of trimuon production (hadronic, mixed, leptonic and trident modes). Background sources are expected to be significant and will have to be se...
متن کاملDating the origins of the maize-adapted strain of maize streak virus, MSV-A
Maize streak virus (MSV), which causes maize streak disease (MSD), is one of the most serious biotic threats to African food security. Here, we use whole MSV genomes sampled over 30 years to estimate the dates of key evolutionary events in the 500 year association of MSV and maize. The substitution rates implied by our analyses agree closely with those estimated previously in controlled MSV evo...
متن کاملImplications of polyploidy events on the phenotype, microstructure, and proteome of Paulownia australis
Polyploidy events are believed to be responsible for increasing the size of plant organs and enhancing tolerance to environmental stresses. Autotetraploid Paulownia australis plants exhibit superior traits compared with their diploid progenitors. Although some transcriptomics studies have been performed and some relevant genes have been revealed, the molecular and biological mechanisms regulati...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 2009
ISSN: 0028-646X
DOI: 10.1111/j.1469-8137.2009.03118.x