Journal
GENOME BIOLOGY
Volume 21, Issue 1, Pages -Publisher
BMC
DOI: 10.1186/s13059-020-02146-5
Keywords
Upstream open reading frame; Fine-tuning; Basic leucine zipper; Quantitative trait variation; Asexually reproducing crops; Strawberry; Sugar content
Funding
- National Key R&D Program of China [2018YFA0900600]
- National Natural Science Foundation of China [31788103, 31971370, 31900301]
- Chinese Academy of Sciences [QYZDY-SSW-SMC030]
- R&D Program in Key Areas of Guangdong Province [2018B020202005]
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Fine-tuning quantitative traits for continuous subtle phenotypes is highly advantageous. We engineer the highly conserved upstream open reading frame (uORF) ofFvebZIPs1.1in strawberry (Fragaria vesca), using base editor A3A-PBE. Seven novel alleles are generated. Sugar content of the homozygous T1 mutant lines is 33.9-83.6% higher than that of the wild-type. We also recover a series of transgene-free mutants with 35 novel genotypes containing a continuum of sugar content. All the novel genotypes could be immediately fixed in subsequent generations by asexual reproduction. Genome editing coupled with asexual reproduction offers tremendous opportunities for quantitative trait improvement.
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