Dataset Information

Chromosome evolution and the genetic basis of agronomically important traits in greater yam.

ABSTRACT: The nutrient-rich tubers of the greater yam, Dioscorea alata L., provide food and income security for millions of people around the world. Despite its global importance, however, greater yam remains an orphan crop. Here, we address this resource gap by presenting a highly contiguous chromosome-scale genome assembly of D. alata combined with a dense genetic map derived from African breeding populations. The genome sequence reveals an ancient allotetraploidization in the Dioscorea lineage, followed by extensive genome-wide reorganization. Using the genomic tools, we find quantitative trait loci for resistance to anthracnose, a damaging fungal pathogen of yam, and several tuber quality traits. Genomic analysis of breeding lines reveals both extensive inbreeding as well as regions of extensive heterozygosity that may represent interspecific introgression during domestication. These tools and insights will enable yam breeders to unlock the potential of this staple crop and take full advantage of its adaptability to varied environments.

SUBMITTER: Bredeson JV

PROVIDER: S-EPMC9010478 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Chromosome evolution and the genetic basis of agronomically important traits in greater yam.

Bredeson Jessen V JV Lyons Jessica B JB Oniyinde Ibukun O IO Okereke Nneka R NR Kolade Olufisayo O Nnabue Ikenna I Nwadili Christian O CO Hřibová Eva E Parker Matthew M Nwogha Jeremiah J Shu Shengqiang S Carlson Joseph J Kariba Robert R Muthemba Samuel S Knop Katarzyna K Barton Geoffrey J GJ Sherwood Anna V AV Lopez-Montes Antonio A Asiedu Robert R Jamnadass Ramni R Muchugi Alice A Goodstein David D Egesi Chiedozie N CN Featherston Jonathan J Asfaw Asrat A Simpson Gordon G GG Doležel Jaroslav J Hendre Prasad S PS Van Deynze Allen A Kumar Pullikanti Lava PL Obidiegwu Jude E JE Bhattacharjee Ranjana R Rokhsar Daniel S DS

Nature communications 20220414 1

The nutrient-rich tubers of the greater yam, Dioscorea alata L., provide food and income security for millions of people around the world. Despite its global importance, however, greater yam remains an orphan crop. Here, we address this resource gap by presenting a highly contiguous chromosome-scale genome assembly of D. alata combined with a dense genetic map derived from African breeding populations. The genome sequence reveals an ancient allotetraploidization in the Dioscorea lineage, followe ...[more]

PMID: 35422045

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Dataset Information

Chromosome evolution and the genetic basis of agronomically important traits in greater yam.

Publications

Chromosome evolution and the genetic basis of agronomically important traits in greater yam.

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