The classical model of concerted evolution states that hundreds to thousands of ribosomal
DNA (rDNA) units undergo homogenization, making the multiple copies of the individual …

Polyploidy, or whole genome multiplication, is ubiquitous among angiosperms. Many crop
species are relatively recent allopolyploids, resulting from interspecific hybridization and …

Investigators have long searched for a polyploidy paradigm—rules or principles that might
be common following polyploidization (whole‐genome duplication, WGD). Here we attempt …

Recent studies have shown that one of the parental subgenomes in ancient polyploids is
generally more dominant, having retained more genes and being more highly expressed, a …

Polyploidy is now recognized as a characteristic feature of all angiosperm genomes (Jiao et
al., 2011), and remains an important speciation process today (Wendel, 2000; Comai, 2005; …

Polyploidization and recombination are two important processes driving evolution through
the building and resha** of genomes. Allopolyploids arise from hybridization and …

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 …

Background 45S rDNA sites are the most widely documented chromosomal regions in
eukaryotes. The analysis of the distribution of these sites along the chromosome in several …

The merging of distinct genomes, allopolyploidization, is a widespread phenomenon in
plants. It generates adaptive potential through increased genetic diversity, but examples …

The large‐scale replacement of gymnosperms by angiosperms in many ecological niches
over time and the huge disparity in species numbers have led scientists to explore factors …