Repositorium
Journal Article / 2017
Filler Hayut, Shdema; Melamed Bessudo, Cathy; Levy, Avraham A.
Homologous recombination (HR) between parental chromosomes occurs stochastically. Here, we report on targeted recombination between homologous chromosomes upon somatic induction of DNA double-strand breaks (DSBs) via CRISPR-Cas9. We demonstrate this via a visual and molecular assay whereby DSB induction between two alleles carrying different mutations in the PHYTOENE SYNTHASE (PSY1) gene results in yellow fruits with wild type red sectors forming via HR-mediated DSB repair. We also show that in heterozygote plants containing one psy1 allele immune and one sensitive to CRISPR, repair of the broken allele using the unbroken allele sequence template is a common outcome. In another assay, we show evidence of a somatically induced DSB in a cross between a psy1 edible tomato mutant and wild type Solanum pimpinellifolium, targeting only the S. pimpinellifolium allele. This enables characterization of germinally transmitted targeted somatic HR events, demonstrating that somatically induced DSBs can be exploited for precise breeding of crops.
Techniques
ID | Corresponding Author Country |
Plant Species | GE Technique Sequence Identifier |
Trait Type of Alteration |
Progress in Research Key Topic |
---|---|---|---|---|---|
1193 |
Levy, Avraham A. Israel |
Solanum lycopersicum |
CRISPR/Cas9 PSY1 |
Yellow fruits SDN1 |
Market-oriented Product quality |
1194 |
Levy, Avraham A. Israel |
Solanum pimpinellifolium |
CRISPR/Cas9 PSY1 |
Yellow fruits SDN1 |
Basic research Basic research |