RESUMO
Chenopodium quinoa (quinoa) is a highly nutritious grain identified as an important crop to improve world food security. Unfortunately, few resources are available to facilitate its genetic improvement. Here we report the assembly of a high-quality, chromosome-scale reference genome sequence for quinoa, which was produced using single-molecule real-time sequencing in combination with optical, chromosome-contact and genetic maps. We also report the sequencing of two diploids from the ancestral gene pools of quinoa, which enables the identification of sub-genomes in quinoa, and reduced-coverage genome sequences for 22 other samples of the allotetraploid goosefoot complex. The genome sequence facilitated the identification of the transcription factor likely to control the production of anti-nutritional triterpenoid saponins found in quinoa seeds, including a mutation that appears to cause alternative splicing and a premature stop codon in sweet quinoa strains. These genomic resources are an important first step towards the genetic improvement of quinoa.
Assuntos
Chenopodium quinoa/genética , Genoma de Planta/genética , Processamento Alternativo/genética , Diploide , Evolução Molecular , Pool Gênico , Anotação de Sequência Molecular , Mutação , Poliploidia , Saponinas/biossíntese , Análise de Sequência de DNA , Fatores de Transcrição/metabolismoRESUMO
This corrects the article DOI: 10.1038/nature21370.