The genome of Chenopodium pallidicaule: An emerging Andean super grain.
Appl Plant Sci
; 7(11): e11300, 2019 Nov.
Article
en En
| MEDLINE
| ID: mdl-31832282
ABSTRACT
PREMISE Cañahua is a semi-domesticated crop grown in high-altitude regions of the Andes. It is an A-genome diploid (2n = 2x = 18) relative of the allotetraploid (AABB) Chenopodium quinoa and shares many of its nutritional benefits. Cañahua seed contains a complete protein, a low glycemic index, and offers a wide variety of nutritionally important vitamins and minerals. METHODS:
The reference assembly was developed using a combination of short- and long-read sequencing techniques, including multiple rounds of Hi-C-based proximity-guided assembly.RESULTS:
The final assembly of the ~363-Mbp genome consists of 4633 scaffolds, with 96.6% of the assembly contained in nine scaffolds representing the nine haploid chromosomes of the species. Repetitive element analysis classified 52.3% of the assembly as repetitive, with the most common repeat identified as long terminal repeat retrotransposons. MAKER annotation of the final assembly yielded 22,832 putative gene models.DISCUSSION:
When compared with quinoa, strong patterns of synteny support the hypothesis that cañahua is a close A-genome diploid relative, and thus potentially a simplified model diploid species for genetic analysis and improvement of quinoa. Resequencing and phylogenetic analysis of a diversity panel of cañahua accessions suggests that coordinated efforts are needed to enhance genetic diversity conservation within ex situ germplasm collections.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Tipo de estudio:
Qualitative_research
Idioma:
En
Revista:
Appl Plant Sci
Año:
2019
Tipo del documento:
Article