Polyploidy, the possession of more than 2 complete genomes, is a major force in plant
evolution known to affect the genetic and genomic constitution and the phenotype of an …

Species of Nicotiana grow naturally in different parts of the world and have long been used
both medicinally and recreationally by human societies. More recently in our history …

Abstract Background The Solanaceae is a plant family of great economic importance.
Despite a wealth of phylogenetic work on individual clades and a deep knowledge of …

Polyploidy, a change whereby the entire chromosome set is multiplied, arises through
mitotic or meiotic misdivisions and frequently involves unreduced gametes and interspecific …

Although they are relative latecomers on the evolutionary scene, having emerged only 135?
170 million years ago, angiosperms—or flowering plants—are the most diverse and species …

Tobacco (Nicotiana tabacum) synthesizes nicotine and related pyridine alkaloids in the root,
and their synthesis increases upon herbivory on the leaf via a jasmonate-mediated signaling …

Background In studies looking at individual polyploid species, the most common patterns of
genomic change are that either genome size in the polyploid is additive (ie the sum of …

Tobacco (Nicotiana tabacum L.) is a species in the large family of the Solanaceae and is
important as an agronomic crop and as a model system in plant biotechnology. Despite its …

Non-retroviral RNA virus sequences (NRVSs) have been found in the chromosomes of
vertebrates and fungi, but not plants. Here we report similarly endogenized NRVSs derived …

The distribution and organization of 5S and 18S–5.8 S–26S (18S) rDNA were studied in 10
varieties of hexaploid Ipomoea batatas, five accessions of tetraploid Ipomeoa trifida, and six …