Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 25:314-316 (1985)
© 1985 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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A Second Dominant Gene for Resistance to Peanut Mottle Virus in Soybeans1

G. R. Buss, C. W. Roane, S. A. Tolin and T. A. Vinardi2

The soybean [Glycine max (L.) Merr.] cultivars ‘Arksoy ’. ‘Dorman ’, ‘York ’, ‘Shore ’, and ‘CNS ’ each contain a single dominant gene for resistance to peanut mottle virus (PMV). Crosses were made among these cultivars and F3 progenies of individual F2 plants were inoculated with PMV. The degree and type of segregation that occurred was used to determine the allelic relationship among the genes in these cultivars. This information is valuable to soybean breeders wishing to incorproate PMV resistance into breeding lines. Segregation was not observed in crosses among Arksoy, Dorman, York and Shore. It was concluded that they contain the previously reported Rpv1 gene for PMV resistance. Crosses of CNS with Dorman, Shore, and York segregated for PMV reaction. The data provided a good fit to the ratio expected from two dominant genes segregating independently. Assignment of a symbol for the CNS gene is being postponed until its allelic relationship with rpv2 in ‘Peking’ is determined. No evidence for linkage was found between the two dominant genes for PMV resistance or between them and the pubescence color gene, T-t.

Key Words: Glycine max (L.) Merr. • ELISA • Linkage • cultivars

1 Contribution of the Dep. of Agronomy and the Dep. of Plant Path., Physiol. and Weed Science; Virginia Polytechnic Inst. and State Univ., Blacksburg, Va. 24061. Financial support of the Virginia Soybean Commission is gratefuly acknowledged.

2 Associate prof. of agronomy, professors of plant pathology and former graduate student, respectively, Virgina PoIytechnic Inst. and State Univ., Blacksburg, Va. 24061.

Received for publication May 29, 1984.




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Copyright © 1985 by the Crop Science Society of America.