Molecular mapping of the soybean nodulation gene, Rj4.

Reference Report for IND21997347

Title:	Molecular mapping of the soybean nodulation gene, Rj4.
Authors:	Ude, G.N., Devine, T.E., Kuykendall, L.D., Matthews, B.F., Saunders, J.A., Kenworthy, W., Lin, J.J.
Source:	Symbiosis 1999, 26(2):101-110
Abstract:	The Rj4 allele in soybean protects the soybean plant from nodulation by many strains of Bradyrhizobium elkanii, a rhizobitoxine chlorosis-inducing species with generally less efficient symbiosis with soybean. However, the frequency of the Rj4 phenotype shows progressive diminution with domestication in Asia and breeding for agronomic type in North America. This decrease in frequency might be due to linkage of the Rj4 gene with unknown genes selected against during domestication and breeding for agronomic type. For this reason it is of interest to determine the location of the Rj4 gene in the soybean genome. In this study, we tested the Rj4 gene for linkage with Amplified Fragment Length Polymorphism (AFLP) markers segregating in recombinant inbred lines of the cross of PI290136 X BARC-2 (Rj4). The Rj4 gene was mapped to a catena of AFLP markers.

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

U.S. Public Domain