Identification of two dominant genes conditioning brown stem rot resistance in soybean

Reference Report for ADL87096009

Title:	Identification of two dominant genes conditioning brown stem rot resistance in soybean
Authors:	Hanson, P.M., Nickell, C.D., Gray, L.E., Sebastian, S.A.
Source:	Crop Sci. 1988, 28(1):41-43
Abstract:	Brown stem rot (BSR), caused by Phialophora gregata (Allington and Chamberlain) W. Gams, is an important disease of soybean [Glycine max (L.) Merr.] especially in the North Central USA. This study was conducted to provide an additional generating of data to confirm the presence of a single dominant allele for BSR resistance in L78-4094, to determine the number of alleles conditioning BSR resistance in P1437833, and to study the relationship between BSR resistance alleles in P1437833 and L78-4094. Plants (F2) of LN78-2714 BSR-susceptible (S) .times. L78-4094 BSR-resistant (R), F2 plants and F2.3 families of crosses P1437833 (R) .times. 'Century' (S) and P1437833 (R) .times. L78-4094 (R) were inoculated in the greenhouse and evaluated for BSR resistance. Plants were classified as resistant or susceptible based on the presence or absence of leaf necrosis 5 weeks after inoculation. The BSR resistance in L78-4094 is conditioned by a dominant allele, designated Rbs, and the BSR resistance in P1437833 is governed by a dominant allele different from Rbs1, designated Rbs2.

Funded by the USDA-ARS. Developed by the USDA-ARS SoyBase and Legume Clade Database group at the Iowa State University, Ames, IA

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