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Effect of wheat genotype on the phenotype of wheat × jointed goatgrass (Aegilops cylindrica) hybrids

Published online by Cambridge University Press:  20 January 2017

Maqsood Rehman ,
Jennifer L. Hansen ,
Jack Brown ,
William Price ,
Robert S. Zemetra  and
Carol A. Mallory-Smith
Jennifer L. Hansen
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83843-2339
Jack Brown
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83843-2339
William Price
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83843-2339
Robert S. Zemetra
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83843-2339
Carol A. Mallory-Smith
Affiliation:
Department of Crop and Soil Science, 107 Crop Science Building, Oregon State University, Corvallis, OR 97331-3002
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Abstract

Jointed goatgrass is a troublesome weed in winter wheat in the Pacific Northwest of the United States. Wheat and jointed goatgrass (JGG) can cross and produce hybrids in the field that can serve as a potential bridge for gene migration between the two species. To determine the potential for gene movement it is important to be able to identify hybrids in the field. To study the effect of wheat genotype on hybrid phenotype, reciprocal crosses were made between JGG and two common wheat cultivars: ‘Brundage 96’, ‘Hubbard’, a common-type advanced breeding line: ‘87–52814A’, and a club wheat cultivar: ‘Rhode’. Hybrids and parents were measured for plant height, spike length, flag leaf length, flag leaf width, and number of spikelets. Reciprocal effects were nonsignificant for all characteristics measured, indicating that hybrid morphology was not affected by the direction of the cross. Hybrids were different from their wheat parents for spike length, plant height, and flag leaf width. Hybrids produced from each of the wheat parents were uniform in phenotypic characters. Spikes were intermediate in circumference (size) from crosses between JGG and common wheat lines; however, club wheat × JGG crosses resulted in spikes that were more similar to common wheat. Spike size and flag leaf width for all hybrids also were intermediate between their parents. Hybrids differed in spike size and awn characteristics because of unique characteristics of the wheat parent. Based on these results, it should be possible to identify hybrids in the field accurately, regardless of the wheat parent or direction of the cross unless the parent is a club wheat.

Keywords

Jointed goatgrass, Aegilops cylindrica Host., AEGCYwinter wheat, Triticum aestivum L.Gene flowherbicide-resistant wheatinterspecific hybrids
Type
Research Article
Information
Weed Science , Volume 54 , Issue 4 , August 2006 , pp. 690 - 694
Copyright
Copyright © Weed Science Society of America 

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