Journal
NEW PHYTOLOGIST
Volume 201, Issue 3, Pages 1021-1030Publisher
WILEY
DOI: 10.1111/nph.12560
Keywords
allopolyploid speciation; phylogenomics; polyploid parentage; polyploidy; ultra-barcoding
Categories
Funding
- Natural Sciences and Engineering Research Council (NSERC)
- NSERC [327475]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0820451] Funding Source: National Science Foundation
Ask authors/readers for more resources
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 of domestication in this region. Its tubers were adopted as a source of food and forage when the species was transferred to the Old World in the early 1600s, and are still used today. Despite the cultural and economic importance of this tuber crop species, its origin is debated. Competing hypotheses implicate the occurrence of polyploidization with or without hybridization, and list the annual sunflower H. annuus and five distantly related perennial sunflower species as potential parents. Here, we test these scenarios by skimming the genomes of diverse populations of Jerusalem Artichoke and its putative progenitors. We identify relationships among Helianthus taxa using complete plastomes (151 551 bp), partial mitochondrial genomes (196 853 bp) and 35S (8196 bp) and 5S (514 bp) ribosomal DNA. Our results refute the possibility that Jerusalem Artichoke is of H. annuus ancestry. We provide the first genetic evidence that this species originated recursively from perennial sunflowers of central-eastern North America via hybridization between tetraploid Hairy Sunflower and diploid Sawtooth Sunflower.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available