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Cacao Genome Sequencing May Prove a Boon to Chocoholics

by Tanya Thomas on September 19, 2010 at 9:33 AM
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 Cacao Genome Sequencing May Prove a Boon to Chocoholics

In what could prove to be the next sugar rush for the US chocolate industry, scientists have successfully sequenced the cacao genome, or the so-called chocolate gene.

The achievement made by the U.S. Department of Agriculture (USDA) scientists will help sustain the supply of high-quality cocoa to the 17 billion dollar U.S. chocolate industry and protect the livelihoods of small farmers around the world by speeding up development, through traditional breeding techniques, of trees better equipped to resist the droughts, diseases and pests that threaten this vital agricultural crop.

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"Because of the talent and dedication brought together by this unique partnership, researchers and plant breeders will be able to accelerate the genetic improvement of the cacao crop now cultivated in tropical regions around the world," said Edward B. Knipling, administrator of USDA's Agricultural Research Service (ARS).

"This will benefit not only the chocolate industry, but also millions of small farmers who will be able to continue to make their living from cacao," he added.
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Cocoa comes from the cacao tree, Theobroma cacao. The tree seeds are processed into cocoa beans that are the source of cocoa, cocoa butter and chocolate.

But fungal diseases can destroy seed-bearing pods and wipe out up to 80 percent of the crop, and cause an estimated 700 million dollar in losses each year.

Worldwide demand for cacao now exceeds production, and hundreds of thousands of small farmers and landholders throughout the tropics depend on cacao for their livelihoods. An estimated 70 percent of the world's cocoa is produced in West Africa.

Scientists worldwide have been searching for years for ways to produce cacao trees that can resist evolving pests and diseases, tolerate droughts and produce higher yields.

ARS researchers have been testing new cacao tree varieties developed with genetic markers.

But having the genome sequenced is expected to speed up the process of identifying genetic markers for specific genes that confer beneficial traits, enabling breeders to produce superior new lines through traditional breeding techniques.

Sequencing cacao's genome also will help researchers develop an overall picture of the plant's genetic makeup, uncover the relationships between genes and traits, and broaden scientific understanding of how the interplay of genetics and the environment determines a plant's health and viability.

Source: ANI
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