美国科学60秒 SSS 2012-12-03
时间：2013-06-25 07:39:49
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（单词翻译）
In the last decade scientists have managed to sequence the genomes of everything from bacteria and fruit flies to individual human beings. But often overlooked are the genomic sequences of our food. We know the genomes of apples, bananas, potatoes, wheat, rice and now watermelon.
A consortium of scientists from the United States, China and Europe has published the complete genome of the
domesticated1 watermelon—one of the top five consumed fresh fruits—in the journal Nature Genetics.
The group compared the genomes of 20 different watermelons across three different subspecies and found it takes roughly the same number of
genes3 to make the sweet summer fruits as it does to make us.
They researchers also found that, in the process of being selected for color, size and taste, domestic watermelon lost many of the genes that helped their wild ancestors resist disease. They hope that breeders can now use the
genetic2 info to recover some of those natural disease defenses—as well as bringing a more
nutritious4, and tastier fruit to your table. Without the seeds, of course.
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