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Chromosome evolution and the genetic basis of agronomically important traits in greater yam - MaRDI portal

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

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DOI10.5281/zenodo.5715419Zenodo5715419MaRDI QIDQ6719425

Dataset published at Zenodo repository.

Author name not available (Why is that?)

Publication date: 18 January 2022



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 our new 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.






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