Journal
SCIENCE CHINA-LIFE SCIENCES
Volume 65, Issue 3, Pages 515-528Publisher
SCIENCE PRESS
DOI: 10.1007/s11427-021-2033-2
Keywords
reference genome; Taraxacum kok-saghyz; Taraxacum mongolicum; comparative genomics; natural rubber biosynthesis pathway
Categories
Funding
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA24030504, XDA24040305]
- National Natural Science Foundation of China [32000144]
- Key Research Program of the Chinese Academy of Sciences [ZDRW-ZS-2018-2]
Ask authors/readers for more resources
The study presents high-quality genome assemblies of rubber-producing and non-rubber-producing Taraxacum species, revealing a large number of genetic variations and confirming two polyploidization events in these two species. These findings have implications for understanding the mechanism of NR biosynthesis and improving NR-producing crops.
Plants belonging to the genus Taraxacum are widespread all over the world, which contain rubber-producing and non-rubber-producing species. However, the genomic basis underlying natural rubber (NR) biosynthesis still needs more investigation. Here, we presented high-quality genome assemblies of rubber-producing T. kok-saghyz TK1151 and non-rubber-producing T. mongolicum TM5. Comparative analyses uncovered a large number of genetic variations, including inversions, translocations, presence/absence variations, as well as considerable protein divergences between the two species. Two polyploidization events were found in these two Taraxacum species, including one common ancestral whole-genome triplication of the Eudicots and one subsequent round of polyploidization. In genomes of both TK1151 and TM5, we identified the genes encoding for each step in the NR biosynthesis pathway and found that the SRPP and CPT gene families have experienced a more obvious expansion in TK1151 compared to TM5. This study will have large-ranging implications for the mechanism of NR biosynthesis and genetic improvement of NR-producing crops.
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