Ancient duplication events and a high rate of retention of extant pairs of duplicate genes
have contributed to an abundance of duplicate genes in plant genomes. These duplicates …

Genomic analysis of many nonmodel species has uncovered an incredible diversity of sex
chromosome systems, making it possible to empirically test the rich body of evolutionary …

Hybrid maize displays superior heterosis and contributes over 30% of total worldwide cereal
production. However, the molecular mechanisms of heterosis remain obscure. Here we …

Coffea arabica, an allotetraploid hybrid of Coffea eugenioides and Coffea canephora, is the
source of approximately 60% of coffee products worldwide, and its cultivated accessions …

Plants evolved so that their flowering is triggered by seasonal changes in day length.
However, day-length sensitivity in crops limits their geographical range of cultivation, and …

Oilseed rape (Brassica napus L.) was formed~ 7500 years ago by hybridization between B.
rapa and B. oleracea, followed by chromosome doubling, a process known as …

Polyploidy is a major force in plant evolution and speciation. In newly formed allopolyploids,
pairing between related chromosomes from different subgenomes (homoeologous …

Hybridization has many and varied impacts on the process of speciation. Hybridization may
slow or reverse differentiation by allowing gene flow and recombination. It may accelerate …

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

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