Unraveling Tomato’s Genetic Mysteries: How Background Mutations Alter Outcomes

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Each operates in a sea of thousands of so-called “background” mutations. These changes have been sowed by evolution and agricultural history. And what if just one could dramatically alter the desired outcome of an engineered mutation?have teamed up to explore just how predictable plant breeding actually is with natural and CRISPR mutations. To do so, they turned back the evolutionary clock.

“Is genome editing a way to quickly bring in consumer benefits—better flavor, nutrition? The answer is probably yes. The question is how predictable is it going to be.” Lippman and McCandlish’s work suggests the role of background mutations demands reassessment. “The field will have to grapple with this as we start to make more highly engineered organisms,” says McCandlish. “Once you start making 10, 20 mutations, the probability of having unanticipated results may increase.”The book of evolution has been written in all different languages, many of which we’re still learning. Plant genetics and computational biology offer two means of deciphering the text.

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