Mapping the Way to a Better Soybean

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This is the VOA Special English Agriculture Report, from http://voaspecialenglish.com Soybeans are eaten by people and fed to animals. Some farmers grow them to replace lost nitrogen in the soil. Soybeans were first grown in Asia thousands of years ago. Now scientists have a full genetic map of the soybean. This is the first genome completed for a member of the legume family. The genome will make it easier to target different qualities and develop improved crops. Sequencing the genes, organizing all of them in order, will save many hours of searching. It will make it easier to search for what each gene is responsible for. A report on the genome appeared in the journal Nature. Scott Jackson at Purdue University in West Lafayette, Indiana, helped lead the study team. He says the kind of soybeans they studied have forty-six thousand genes. Between seventy and eighty percent of them, however, are copies of other genes. Some genes change or disappear over time. But Professor Jackson explains that soybeans have kept copies of most of their genes. This is fairly unusual for plants, he says, and extremely unusual for animals. Genes are organized along chromosomes. These contain molecules of DNA, the building blocks of life. The researchers found that the sets of chromosomes in soybeans have copied themselves at least twice. It happened almost sixty million years ago and again thirteen million years ago. Over time, genes develop changes

Published 2010-03-01 · Watch on YouTube ↗
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