Annals of Botany Directional gene conversion and homogenization of rDNA shapes evolution in Brassica Brassica napus (AACC, oilseed rape) is an allotetraploid species derived from the putative progenitor diploid species B.rapa (AA) and B. oleracea (CC). To assess the influence of intensive breeding conditions on the... botanyoneFebruary 15, 2017