Navigation Links
Gene discovery could lead to better soybean varieties for Northern United States

WEST LAFAYETTE, Ind. Researchers from Purdue University and the University of Nebraska-Lincoln have discovered a soybean gene whose mutation affects plant stem growth, a finding that could lead to the development of improved soybean cultivars for the northern United States.

Purdue agronomy professor Jianxin Ma (pronounced Jen-SHIN' Ma) and collaborators identified a gene known as Dt2, which causes semideterminacy in soybean plants. Semideterminate soybean plants - mid-size plants that continue vegetative growth even after flowering - can produce as many or more pods than current northern cultivars but do not grow as tall. Their reduced height makes them more resistant to lodging, a bending or breaking of the main plant stem.

"This gene could help us improve the yield potential and adaptability of soybeans for specific growing areas," Ma said. "We can now focus on developing a variety of elite semideterminate soybean cultivars, which could perform very well in high-yielding, irrigated environments such as Nebraska and northeastern Indiana."

Soybean cultivars are often divided into two groups: indeterminate - tall plants whose main stem continues to grow after flowering - and determinate - shorter, bushier plants whose main stem halts growth when blossoms begin to form.

Determinate soybean plants thrive in the longer growing season of the south while indeterminate plants' overlapping vegetative and reproductive stages make them better suited to the north. But the height of indeterminate cultivars renders them prone to lodging.

For northern soybean producers, semideterminate soybean plants could represent a "Goldilocks" cultivar, a "just right" alternative between the two. Semideterminate soybeans are easy to manage, have similar or better yields than indeterminate plants and can handle a short growing season, Ma said.

Only one semideterminate soybean cultivar, NE3001, is common in the United States. Having pinpointed Dt2 will enable Ma and his researchers to use natural plant breeding methods to develop a variety of semi-determinate cultivars.

"The potential for soybean yield productivity in the U.S. has not been fully explored, in part because of the lack of semideterminate cultivars," he said. "We're now working on converting high-yielding indeterminate cultivars to semideterminate types to test their yield potential."

Ma - who had previously identified Dt1, the gene that causes indeterminancy in soybeans - used an integrated genetic approach to isolate and characterize Dt2. After identifying the gene, he inserted it into indeterminate cultivars to confirm that it caused the plants to become semideterminate. Dt2 suppresses the expression level of Dt1, causing soybean plants to grow shorter.

Ma said this type of mutation appears to be unique to soybeans as semideterminancy in other plants such as tomatoes and chickpeas is caused by a different genetic mechanism.

Study co-author James Specht, a professor of agronomy and horticulture at the University of Nebraska-Lincoln, said the identification of Dt2 gives soybean breeders a powerful tool for breeding new cultivars.

"This provides breeders with a perfect genetic marker for identifying semideterminancy in soybean seeds and seedlings," he said.


Contact: Natalie van Hoose
Purdue University

Related biology news :

1. Discovery provides insights on how plants respond to elevated CO2 levels
2. New discovery in living cell signaling
3. Discovery of Earths northernmost perennial spring
4. Discovery of a bud-break gene could lead to trees adapted for a changing climate
5. The transmission of information via proteins could revolutionize drug discovery
6. Scientists weed out pesky poison ivy with discovery of killer fungus
7. Amber discovery indicates Lyme disease is older than human race
8. Promising discovery in the fight against antibiotic-resistant bacteria
9. New discovery: Molecule links asthma and cancer and could aid in developing new treatments
10. Scientists at the UA make critical end-stage liver disease discovery
11. Autism Genome Project delivers genetic discovery
Post Your Comments:
Related Image:
Gene discovery could lead to better soybean varieties for Northern United States
(Date:11/17/2015)... , November 17, 2015 Paris ... 2015.   --> Paris from 17 ... DERMALOG, the biometrics innovation leader, has invented the first ... fingerprints on the same scanning surface. Until now two different ... Now one scanner can capture both on the same ...
(Date:11/12/2015)... 12, 2015  A golden retriever that stayed healthy ... (DMD) has provided a new lead for treating this ... Broad Institute of MIT and Harvard and the University ... Cell, pinpoints a protective gene ... disease,s effects. The Boston Children,s lab of Lou ...
(Date:11/10/2015)... 2015 About signature verification ... to identify and verify the identity of an ... the secure and accurate method of authentication and ... individual because each individual,s signature is highly unique. ... dynamic signature of an individual is compared and ...
Breaking Biology News(10 mins):
(Date:11/30/2015)... BETHESDA, Md. , Nov. 30, 2015 /PRNewswire/ ... property development company committed to the fostering and ... on the current and prospective initiatives designed to ... , Chief Executive Officer of Spherix. "Based on ... potential future licensees exceeds $50 billion and Spherix ...
(Date:11/30/2015)... 2015 Human Longevity, Inc. (HLI), the genomics-based, ... Cypher Genomics, Inc., a leading genome informatics company offering ... solutions. The San Diego -based company ... CEO and Co-founder, Ashley Van Zeeland , Ph.D., who ... details of the deal were not disclosed. ...
(Date:11/30/2015)... 30, 2015  Aytu BioScience, Inc. (OTCQB: AYTU), a ... conditions, will present at two upcoming investor conferences. Aytu ... real-time virtual conference, to be held December 3, 2015, ... be held December 2 nd & 3 rd ... and streamed live via webcast. Josh Disbrow ...
(Date:11/30/2015)... 30, 2015  Northwest Biotherapeutics (NASDAQ: NWBO ) ... immune therapies for solid tumor cancers, announced today that ... director, and the Company welcomes Neil Woodford,s ... recent anonymous internet report on NW Bio.  The Company,s ... Linda Powers stated, "We agree with Mr. Woodford ...
Breaking Biology Technology: