Evolutionary dynamics and preferential expression of homeologous 18S-5.8S-26S nuclear ribosomal genes in natural and artificial glycine allopolyploids.

Polyploidy is an important evolutionary process in plants, but much remains to be learned about the evolution of gene expression in polyploids. Evolution and expression of the 18S-5.8S-26S ribosomal gene family was investigated at homeologous loci in the Glycine subgenus Glycine perennial soybean polyploid complex, which consists of several diploid genomes that have formed allopolyploids in various combinations, often recurrently.