You might call it a cup of Joe, java, mud, brew, mocha, or your morning jolt. Coffee undoubtedly is a big part of global culture, and the kind made from the Arabica bean is the most appreciated by coffee drinkers.
Researchers now have unlocked the genome of the Arabica species and traced its origins to a natural mating between two other coffee species an estimated 610,000 to one million years ago in the forests of Ethiopia. That makes this species older than our own species Homo sapiens, which arose in Africa about 300,000 years ago.
The researchers sequenced the genomes of 39 Arabica varieties, including a specimen from the 18th century, to create the highest quality genome to date of this species, whose scientific name is Coffea arabica. They also uncovered a specific region of the genome that may be pivotal for breeding or genetically engineering disease resistance.
