In the 1950s, scientists found a wild tomato relative in the Galapagos
Island that does not have a swollen part of the stem referred to as joint.
Joints are the weak parts of the stem that make the fruit fall easily from
the plant. Breeders then developed jointless tomatoes to prolong the stay of
the fruits in the plants. However, when the jointless tomato was bred with
the existing tomato varieties, the resulting plants had flower-bearing
branches that produced many extra branches and looked like a broom,
terminating in a host of flowers. This led to reduced number of fruits.

Years after, geneticist Zachary Lippman of Cold Spring Harbor Laboratory in
New York and other researchers tracked down the
[www.isaaa.org] gene
responsible for the jointless trait and another gene that promotes the
formation of a large green cap of leaf-like structures on top of the fruit.
Then they used CRISPR-Cas9 to correct the conflict of the traits, leading to
tomato plants with different plant architectures,including those with long,
spindly flower-bearing branches to bushy, cauliflower-like bunches of
flowers, and some with better yields.

[www.nature.com]
ding-snafu-1.22018?WT.ec_id=NEWSDAILY-20170519



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