Quinoa has recently gained international attention because of its nutritious seeds, prompting the expansion of its cultivation into new areas in which it was not originally selected as a crop. Improving quinoa production in these areas will benefit from the introduction of advantageous traits from free-living relatives that are native to these, or similar, environments. As part of an ongoing effort to characterize the primary and secondary germplasm pools for quinoa, we report the complete mitochondrial and chloroplast genome sequences of quinoa accession PI 614886 and the identification of sequence variants in additional accessions from quinoa and related species. This is the first reported mitochondrial genome assembly in the genus Chenopodium. Inference of phylogenetic relationships among Chenopodium species based on mitochondrial and chloroplast variants supports the hypotheses that 1) the A-genome ancestor was the cytoplasmic donor in the original tetraploidization event, and 2) highland and coastal quinoas were independently domesticated.
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We gratefully acknowledge David Brenner (USDA-NPGS, Ames, IA), Eulogio de la Cruz (ININ, Ocoyoacac, Mexico), Daniel Bertero (UBA, Buenos Aires, Argentina), Helena Storchova (Institute of Experimental Botany, Prague, Czech Republic), Francisco Fuentes (Pontificia Universidad Catolica, Santiago, Chile) and Angel Mujica (Universidad del Altiplano, Puno, Peru) for taxonomic suggestions and seed contribution. This research was funded by the Holmes Family Foundation.
© 2019, The Author(s).
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