Editing Sugar beet (section)

== Genome and genetics ==
The sugar beet genome shares a triplication event somewhere super-Caryophyllales and at or sub-[[Eudicot]]s. It has been sequenced and two reference genome sequences have already been generated.<ref name="Dohm-et-al-2013" /> The genome size of the sugar beet is approximately 731 (714–758)<ref name="Dohm-et-al-2013" /> Megabases, and sugar beet DNA is packaged in 18 metacentric chromosomes (2n=2x=18).<ref name="Paesold" /> All sugar beet centromeres are made up of a single [[satellite DNA]] family<ref name="Zakrzewski" /> and centromere-specific [[LTR retrotransposon]]s.<ref name="Weber2013" /> More than 60% of sugar beet's DNA is repetitive, mostly distributed in a dispersed way along the chromosomes.<ref name="Weber2010" /><ref name="Wollrab" /><ref name="Heitkam" /><ref name="Schwichtenberg" />

Crop wild beet populations (''B. vulgaris'' ssp. ''maritima'') have been sequenced as well, allowing for identification of the resistance gene ''Rz2'' in the wild progenitor.<ref name="Capistrano-Gossmann" /> ''Rz2'' confers resistance to rhizomania, commonly known as the sugar beet root madness disease.