Genome skimming reveals the origin of the Jerusalem Artichoke tuber crop species: neither from Jerusalem nor an artichoke

• DOI: 10.1111/nph.12560
• Publication Date: 2013-11-19T01:31:48Z
• Authors: Dan G. Bock; Nolan C. Kane; Daniel P. Ebert; Loren H. Rieseberg
• Keywords: Helianthus; Jerusalem artichoke; Helianthus annuus; Germ plasm; Introgression

Summary The perennial sunflower Helianthus tuberosus , known as Jerusalem Artichoke or Sunchoke, was cultivated in eastern North America before European contact. As such, it represents one of the few taxa that can support an independent origin domestication this region. Its tubers were adopted a source food and forage when species transferred to Old World early 1600s, are still used today. Despite cultural economic importance tuber crop species, its is debated. Competing hypotheses implicate occurrence polyploidization with without hybridization, list annual H. annuus five distantly related potential parents. Here, we test these scenarios by skimming genomes diverse populations putative progenitors. We identify relationships among using complete plastomes (151 551 bp), partial mitochondrial (196 853 bp) 35S (8196 5S (514 ribosomal DNA . Our results refute possibility ancestry. provide first genetic evidence originated recursively from sunflowers central‐eastern via hybridization between tetraploid Hairy Sunflower diploid Sawtooth Sunflower.