‘MN-Clearwater’, the first food-grade intermediate wheatgrass (Kernza perennial grain) cultivar

Research output: Contribution to journalArticlepeer-review

Abstract

‘MN-Clearwater’ (Reg. no. CV-287, PI 692651) is the world's first commercial food-grade intermediate wheatgrass [IWG; Thinopyrum intermedium (Host) Barkworth & D.R. Dewey subsp. intermedium] grain cultivar. It was developed as a synthetic population at the University of Minnesota, St. Paul, MN, and released in August 2019. Intermediate wheatgrass is a perennial grain crop currently undergoing domestication and is known for its extensive long root system that can recycle soil nutrients and sequester carbon. MN-Clearwater (experimental designation MN1504) was created by intercrossing seven parents selected for high grain yield, reduced shattering, high free grain threshing, reduced lodging, and uniform maturity. MN-Clearwater was advanced for two generations before being evaluated in statewide yield trials, after which the fourth seed generation was released as the cultivar in a limited public release. In variety trials across Minnesota, MN-Clearwater produced 696 kg ha−1 (621 lb ac−1) of grain with minimal lodging and negligible disease levels. The first 2 yr produce the highest grain yields under Minnesota conditions, and third-year yields are significantly lower (average reduction of 77%) than the first 2 yr. As the first IWG cultivar released for sale under the Kernza trade name (The Land Institute), we expect this population to be a cornerstone resource for the IWG research community as well as for interested growers, food processors, and commercial partners. MN-Clearwater grain is sold as Kernza perennial grain.

Original languageEnglish (US)
Pages (from-to)288-297
Number of pages10
JournalJournal of Plant Registrations
Volume14
Issue number3
DOIs
StatePublished - Sep 1 2020

Bibliographical note

Funding Information:
We are thankful to the University of Minnesota Agricultural Experiment Station for their support in field preparation and evaluations. We thank Colin Cureton, Supply Chain Development Specialist with the University of Minnesota's Forever Green Initiative, for developing release policies for and coordinating seed distribution of MN‐Clearwater, and MN Crop Improvement Association for seed certification and maintenance. The authors also acknowledge collaborations with the Jesse Poland lab at Kansas State University, USDA‐ARS, in Logan, UT, and The Land Institute for their expertise and instrumental support during various phases leading up to the development and release of MN‐Clearwater. Funding for development of MN‐Clearwater came from The Initiative for Renewable Energy & the Environment, University of Minnesota, and the Forever Green Initiative at the University of Minnesota via the Minnesota Department of Agriculture, the General Mills Foundation, and the Minnesota Department of Agriculture award # SWIFT 122132/PO 22975.

Funding Information:
We are thankful to the University of Minnesota Agricultural Experiment Station for their support in field preparation and evaluations. We thank Colin Cureton, Supply Chain Development Specialist with the University of Minnesota's Forever Green Initiative, for developing release policies for and coordinating seed distribution of MN-Clearwater, and MN Crop Improvement Association for seed certification and maintenance. The authors also acknowledge collaborations with the Jesse Poland lab at Kansas State University, USDA-ARS, in Logan, UT, and The Land Institute for their expertise and instrumental support during various phases leading up to the development and release of MN-Clearwater. Funding for development of MN-Clearwater came from The Initiative for Renewable Energy & the Environment, University of Minnesota, and the Forever Green Initiative at the University of Minnesota via the Minnesota Department of Agriculture, the General Mills Foundation, and the Minnesota Department of Agriculture award # SWIFT 122132/PO 22975.

Publisher Copyright:
© 2020 The Authors. Journal of Plant Registrations © 2020 Crop Science Society of America

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