Effect of Wheat Cultivars on the Phenotype of Wheat x Jointed Goatgrass Hybrids. (W-rehman240763-oral)
Authors:
M. Rehman* - Univ. of Idaho J. Brown - Univ. of Idaho W. Price - Univ. of Idaho J.L. Hansen - Univ. of Idaho
C. Mallory-Smith - Oregon State University R.S. Zemetra - Univ. Of Idaho
Abstract:
Effect of wheat genotype on the phenotype of wheat x jointed goatgrass hybrids M. Rehman**, J.
Brown, B. Price, and R. S. Zemetra (University of Idaho) To study the potential for gene migration between wheat (Triticum aestivum) and jointed goatgrass (Aegilops cylindrica) it is important to be able to recognize hybrids between the two species in the field, regardless of the wheat background. To study the effect of wheat genotype on hybrid phenotype, reciprocal crosses were made between jointed goatgrass and two common wheat cultivars; Brundage, Hubbard, a club wheat: Rhode, and one advance breeding line; 8752814-A to compare the resultant phenotypes of the wheat x jointed
goatgrass hybrids. The reciprocal hybrids and parents were measured for plant height, spike length, flag leaf length, flag leaf width, and number of spikelets. In addition, observations were made on hybrid head size, number of tillers, and awn characteristics of the hybrids. The resulting data were analyzed as a randomized complete block design. Comparisons were carried out using orthogonal contrasts and least significant difference values. Based on the results, reciprocal effects were non-significant for all
characteristics measured indicating that hybrid morphology was not affected by the direction of the cross. Hybrids were significantly different from their wheat parents for spike length, plant height and flag leaf width. All the hybrids were taller and produced more tillers than their parents. Hybrids produced from any of the wheat parents were uniform for their phenotypic characters. Spike size and flag leaf width for all hybrids were intermediate between their parents. There was a significant interaction between the wheat parents and the hybrids for plant height, spike length, and flag leaf width. Hybrids differed in spike size and awn characteristics due to unique characteristics of the wheat parent. Based on these results, it should be possible to accurately identify hybrids in the field regardless of the wheat parent or direction of the cross unless the wheat parent is club wheat.
Speaker Information: Maqsood Rehman, Univ. of Idaho, PSES University of Idaho, Moscow, ID 83844-2339; Phone: 208-885-7827; E-mail: [email protected]
