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Cultivated tomato clock runs slow.

Steve A Kay1,2, Marie-Stanislas Remigereau1,3

  • 1Dornsife College of Letters, Arts and Sciences at the University of Southern California, Los Angeles, California, USA.

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|December 30, 2015
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Summary
This summary is machine-generated.

Domestication slowed tomato's internal clock by altering two key genes. This research reveals how genetic changes impact plant rhythms and adaptation.

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Area of Science:

  • Plant Biology
  • Genetics
  • Chronobiology

Background:

  • The plant circadian clock, a genetic network, is vital for plant survival.
  • Understanding clock regulation is key to crop improvement.

Purpose of the Study:

  • To investigate the genetic mechanisms underlying circadian clock changes during tomato domestication.
  • To identify specific genes responsible for altered circadian rhythms in cultivated tomatoes.

Main Methods:

  • Comparative genomics analysis of wild and domesticated tomato varieties.
  • Phenotypic analysis of circadian clock traits.
  • Gene expression profiling and genetic mapping.

Main Results:

  • Domestication led to a gradual slowing of the tomato circadian clock.
  • Selection on two major genes significantly impacted clock timing and period.
  • One gene delayed the clock's response to daylight, while another extended its cycle length.

Conclusions:

  • Genetic selection on key clock genes during domestication has altered tomato's daily rhythms.
  • These alterations likely contributed to adaptation to new environments.
  • This study provides insights into the evolution of circadian clocks in crops.