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Downy Brome (Bromus tectorum) Vernalization: Variation and Genetic Controls

Published online by Cambridge University Press:  08 February 2018

Nevin C. Lawrence ,
Amber L. Hauvermale  and
Ian C. Burke
Nevin C. Lawrence*
Affiliation:
Former: Doctoral Research Associate, Department of Crop and Soil Sciences, Washington State University, Pullman, WA, USA; current: Assistant Professor, Department of Agronomy and Horticulture, University of Nebraska–Lincoln, 4502 Avenue I, Scottsbluff, NE, USA
Amber L. Hauvermale
Affiliation:
Postdoctoral Research Associate, Department of Crop and Soil Sciences, Washington State University, Pullman, WA, USA
Ian C. Burke
Affiliation:
Associate Professor, Department of Crop and Soil Sciences, Washington State University, Pullman, WA, USA
*
Author for correspondence: Nevin C. Lawrence, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, 4502 Avenue I, Scottsbluff, NE 69361. (E-mail: nlawrence2@unl.edu)
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Abstract

Downy brome (Bromus tectorum L.) is a widely distributed invasive winter annual grass across western North America. Bromus tectorum phenology can vary considerably among populations, and those differences are considered adaptively significant. A consensus hypothesis in the literature attributes the majority of observed differences in B. tectorum phenology to differing vernalization requirements among populations. A series of greenhouse experiments were conducted to identify differences in B. tectorum vernalization requirements and link vernalization to expression of annual false-brome [Brachypodium distachyon (L.) P. Beauv.]-derived vernalization gene homolog (BdVRN1). Results from this study indicate that variation in time to flowering is partially governed by differing vernalization requirements and that flowering is linked to the expression of BdVRN1.

Keywords

J. Anita Dille, Kansas State UniversityPhenology
Type
Physiology/Chemistry/Biochemistry
Information
Weed Science , Volume 66 , Issue 3 , May 2018 , pp. 310 - 316
Copyright
© Weed Science Society of America, 2018 

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