Journal
NATURE GENETICS
Volume 48, Issue 10, Pages 1225-1232Publisher
NATURE PORTFOLIO
DOI: 10.1038/ng.3657
Keywords
-
Categories
Funding
- Science and Technology Program of Zhejiang Province [2015C32046]
- Ear-marked Special Fund from Ministry of Agriculture [09162130135252]
- National Natural Science Foundation of China [31372063]
Ask authors/readers for more resources
The Brassica genus encompasses three diploid and three allopolyploid genomes, but a clear understanding of the evolution of agriculturally important traits via polyploidy is lacking. We assembled an allopolyploid Brassica juncea genome by shotgun and single-molecule reads integrated to genomic and genetic maps. We discovered that the A subgenomes of B. juncea and Brassica napus each had independent origins. Results suggested that A subgenomes of B. juncea were of monophyletic origin and evolved into vegetable-use and oil-use subvarieties. Homoeolog expression dominance occurs between subgenomes of allopolyploid B. juncea, in which differentially expressed genes display more selection potential than neutral genes. Homoeolog expression dominance in B. juncea has facilitated selection of glucosinolate and lipid metabolism genes in subvarieties used as vegetables and for oil production. These homoeolog expression dominance relationships among Brassicaceae genomes have contributed to selection response, predicting the directional effects of selection in a polyploid crop genome.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available