2021
Creating Five High-Yield Soybean Variety Pairs with Contrasting Biological Nitrogen Fixation Capabilities
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Contributor/Checkoff:
Nebraska Soybean Board
Category:
Sustainable Production
Keywords:
GeneticsGenomics
Parent Project:
Creating Five High-Yield Soybean Variety Pairs with Contrasting Biological Nitrogen Fixation Capabilities
Lead Principal Investigator:
George Graef, University of Nebraska
Co-Principal Investigators:
Project Code:
1740
Contributing Organization (Checkoff):
Nebraska Soybean Board
$50,304
Institution Funded:
University of Nebraska at Lincoln
$50,304
Brief Project Summary:

There are no modern high-yielding varieties in maturity groups (MG) 0, I, II, III and IV zones of adaptation in the North Central US developed as isolines carrying the mutant non root-nodule phenotype that can be compared to their normal root-nodulating counterparts in order to measure the impact of their nitrogen (N) fixing capability. The only existing non-nodulating mutant isolines are two old varieties (Harosoy and Clark) that were developed in the 1960s. To facilitate ongoing research aimed at understanding the current contributions of Biological Nitrogen Fixation (BNF) and nitrate availability (soil residual or fertilizer) that is representative of production environments of MG II...

Unique Keywords:
#breeding & genetics
Information And Results
Project Deliverables

We intend to use a marker-facilitated, fast-track, backcrossing scheme to create BNF- and BNF+ activity contrasts as
two near-isogenic lines in five different high-yielding contemporary soybean backgrounds – one in each of five
maturity groups 0, I, II, III, and IV that can be used in NE and in the other 11 States of the NCSRP for research aimed
at better understanding the relationship between soybean yield potential and the existent routes of N-uptake by
soybean plants. This project will provide the genetic tools to better characterize the apparent decline in harvest index
(and in seed yield) estimates at high-BNF activity. These tools will be made available to researchers in the NCSRP
states upon completion of this project and more importantly, the findings of future research using these genetic
resources can have a profound impact on future soybean genetic improvement and field management practices.

Final Project Results

Updated May 19, 2023:

View uploaded report PDF file

Producers need to know how to maximize the yield of modern soybean varieties. One step towards that goal is to identify optimal N-uptake routes, whether it is via BNF, applied soil nitrate, or some combination of both.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.