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Seed production on Triticum aestivum by Aegilops cylindrica hybrids in the field

  • Jeremy R. Snyder (a1), Carol A. Mallory-Smith, Sara Balter (a2), Jennifer L. Hansen (a2) and Robert S. Zemetra (a2)...

Abstract

Field experiments were conducted to determine if seeds would be produced on Triticum aestivum by Aegilops cylindrica hybrids in the field and, if it were, to determine the viability of the seeds produced. One, five, or 10 hybrids were planted into varying proportions of A. cylindrica and T. aestivum in a replacement series design. Percent seed set ranged from 0 to 5.5% in 1996 and from 0 to 9.2% in 1997. Seeds were set in all treatments. The average seed set was 2.3% in 1996 and 3.8% in 1997. No differences in seed set were found among treatments. The seeds produced were separated according to seed condition, either full or shriveled, and tested for germination. The germination of the seeds produced on the hybrids was not significantly different between years. The average germination for full seeds was 94% in both years and 79 and 84% for shriveled seeds in 1995 and 1996, respectively. Greenhouse studies were conducted to evaluate the rate of self-fertility of the BC1 generation and to identify morphological characteristics that could be used to identify the probable pollen donor parent and to predict the occurrence of seed set. In 1997 4.1% and in 1998 2.1% of BC1 plants set seeds. The average seed set was 0.3% in 1997 and 0.06% in 1998. It was not possible, using any morphological characteristic measured, to determine the identity of the parent serving as the pollen donor in the previous generation or to predict the occurrence of seed set in the BC1 generation. This is the first reported study to show that hybrids between T. aestivum and A. cylindrica have the ability, although limited, to backcross under field conditions and set seeds. Furthermore, the seeds produced are viable and will germinate and produce plants. With the millions of hectares of T. aestivum infested with A. cylindrica, even the limited ability to backcross is of concern for the movement of a herbicide-resistance gene.

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Corresponding author

Corresponding author. Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331; carol.mallory-smith@orst.edu

References

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Chapman, V., Miller, T. E., and Riley, R. 1976. Equivalence of the A genome of bread wheat and that of Triticum urartu . Genet. Res. 27:6976.
Donald, W. W. and Ogg, A. G. Jr. 1991. Biology and control of jointed goatgrass (Aegilops cylindrica), a review. Weed Technol. 53:317.
Gates, F. C. 1936. Grasses in Kansas. Topeka, KS: Kansas State Printing Plant, Report 55:220-A of the Kansas State Board of Agriculture, p. 125.
Hafliger, E. and Scholz, H. 1981. Grass Weeds II. Basle, Switzerland: CIBA-GEIGY, p. 1.
Johnston, C. O. and Parker, J. H. 1929. Aegilops cylindrica Host. A wheatfield weed in Kansas. Trans. Kans. Acad. Sci. 32:8084.
Kimber, G. and Sears, E. R. 1987. Evolution in the genus Triticum and the origin of cultivated wheat. Pages 154164 In Heyne, E. G., ed. Wheat and Wheat Improvement. Agronomy Monograph No. 13. Madison, WI: American Society of Agronomy-Crop Science Society of America-Soil Science Society of America.
Mallory-Smith, C. A., Hansen, J., and Zemetra, R. S. 1996. Gene transfer between wheat and Aegilops cylindrica . Pages 441445 In Proceedings of the Second International Weed Control Congress. Slagelse, Denmark: Department of Weed Control and Pesticide Ecology.
Mayfield, L. 1927. Goat grass—a weed pest of central Kansas wheat fields. Kans. Agric. Student 7:4041.
Miller, S. D. 1995. An integrated approach to jointed goatgrass control. Pages 2729 In Proceedings of the Central Great Plains Jointed Goatgrass Conf., Ogallala, NE; Colby, KS; and Sterling, CO. Lincoln, NE: University of Nebraska; Manhattan, KS: Kansas State University; Fort Collins, CO: Colorado State University and USDA-Cooperative State Research Service.
Newhouse, K. E., Smith, W. A., Starett, M. A., Schaffer, T. J., and Singh, B. J. 1992. Tolerance to imidazolinone herbicides in wheat. Plant Physiol. 100:882886.
Poehlman, J. M. and Sleper, D. A. 1995. Breeding Field Crops. 4th ed. Ames, IA: Iowa State University Press, pp. 259265.
Priadcencu, A. L., Miclea, C., and Moisescu, L. 1967. The local form of the species of Aegilops cylindrica Host. and its genetic importance. Rev. Roum. Biol.-Bot. 6:421425.
Seefeldt, S. S., Zemetra, R., Young, F. L., and Jones, S. S. 1998. Production of herbicide-resistant jointed goatgrass (Aegilops cylindrica) × wheat (Triticum aestivum) hybrids in the field by natural hybridization. Weed Sci. 46:632634.
Slageren, M. W. van. 1994. Wild Wheats: A Monograph of Aegilops L. and Amblyopyrum (Jaub. & Spach) Eig. Wageningen Agricultual University Papers 7 (94). 513 pp.
Wiese, M. V. 1987. Compendium of Wheat Diseases. 2nd ed. St. Paul, MN: American Phytopathology Society Press. p. 3.
Zemetra, R. S., Hansen, J., and Mallory-Smith, C. 1998. Potential for gene transfer between wheat (Triticum aestivum) and jointed goatgrass (Aegilops cylindrica). Weed Sci. 46:313317.

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