VIEW ARTICLE

Resistance

Heritability of Resistance in Winter Wheat to Wheat Spindle Streak Mosaic Virus. M. Van Koevering, Former graduate research assistant, Department of Crop and Soil Sciences, Michigan State University, East Lansing 48824-1312; K. Zagula Haufler(2), D. W. Fulbright(3), T. G. Isleib(4), and E. H. Everson(5). (2)(3)Postdoctoral research associate and Associate professor, respectively, Department of Botany and Plant Pathology, Michigan State University, East Lansing 48824-1312; (4)(5)Assistant professor, and Professor, respectively, Department of Crop and Soil Sciences, Michigan State University, East Lansing 48824-1312. Phytopathology 77:742-744. Accepted for publication 10 November 1986. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/Phyto-77-742.

The heritability of resistance to wheat spindle streak mosaic virus in winter wheat was studied using a seven-parent diallel analysis. Parents and F₁ progenies were evaluated for disease reaction based on virus particle counts determined by immunosorbent electron microscopy. Resistance was found to be a highly heritable trait controlled by a few dominant genes. A two-locus genetic model was proposed to account for the observed resistance classification of the parents and the patterns of inheritance exhibited in the F₁ progenies.