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Gene discovery may lead to new varieties of soybean plants
Date:4/27/2010

in Asia thousands of years ago; and elite cultivars, which are grown today in the United States.

A single base-pair nucleotide mutation in the gene Dt1 was found to be the reason some plants are determinate.

"Wild soybeans are all indeterminate. This mutation that makes them determinate was selected by ancient farmers a few thousand years ago," Ma said. "It seems determinate stem was a favorable characteristic for ancient farmers."

Ma tested the find by using an indeterminate soybean Dt1 gene to change an Arabidopsis thaliana plant from determinate to indeterminate.

Ma believes that ancient farmers selected determinate plants that stay relatively short because they are less likely to lodge, or bend at the stem.

"Their appearance probably resulted in an ancient 'green revolution' in soybean cultivation in the southern parts of ancient China," Ma said.

Ma collaborated with Lijuan Oiu at the Chinese Academy of Agricultural Sciences, Phil McClean at North Dakota State University, Randy Nelson at the University of Illinois and Jim Specht at the University of Nebraska.

Ma said he would next try to find a gene that makes soybeans semi-determinate. The National Science Foundation, Indiana Soybean Alliance and Purdue University funded his work.


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Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert  

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