Abstract
Domestication of clonally propagated crops such as pineapple from South America was hypothesized to be a ‘one-step operation’. We sequenced the genome of Ananas comosus var. bracteatus CB5 and assembled 513 Mb into 25 chromosomes with 29,412 genes. Comparison of the genomes of CB5, F153 and MD2 elucidated the genomic basis of fiber production, color formation, sugar accumulation and fruit maturation. We also resequenced 89 Ananas genomes. Cultivars ‘Smooth Cayenne’ and ‘Queen’ exhibited ancient and recent admixture, while ‘Singapore Spanish’ supported a one-step operation of domestication. We identified 25 selective sweeps, including a strong sweep containing a pair of tandemly duplicated bromelain inhibitors. Four candidate genes for self-incompatibility were linked in F153, but were not functional in self-compatible CB5. Our findings support the coexistence of sexual recombination and a one-step operation in the domestication of clonally propagated crops. This work guides the exploration of sexual and asexual domestication trajectories in other clonally propagated crops.
Original language | English (US) |
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Pages (from-to) | 1549-1558 |
Number of pages | 10 |
Journal | Nature Genetics |
Volume | 51 |
Issue number | 10 |
DOIs | |
State | Published - Oct 1 2019 |
Funding
This work was supported by the Department of Science and Technology of Fujian Province (grant no. 2016NZ0001-1), the National Natural Science Foundation of China grants (nos. U1605212 to Y.Q., 31628013 to Q.Y. and 31701874 to X.Z.), the Fuzhou Science and Technology project (grant no. 2017-N-33 to X.Z.), the Distinguished Young Scholars Fund in Fujian Agriculture and Forestry University (grant no. xjq201609 to L.Y.C.), the National Science Foundation grants (nos. DBI-1401572 to R.V. and DBI-1350041 to M.C.S.), the US National Institutes of Health (grant no. R01-HG006677 to M.C.S.), the NSF Plant Genome grants (nos. 0607123 and 043707-01 to J.L.B. and IOS-1546218 to M.D.P.), Zegar Family Foundation Grant (no. A16-0051-001 to M.D.P.) and the Swiss National Science Foundation grant (no. CRSII3_147630 to C.L.). We thank W. Till, D. Wegmann and D. Bartholomew for helpful discussions and J. Lin for assistance with data submission.
ASJC Scopus subject areas
- Genetics