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The Journal of Heredity 1985:76(3):207-208
© 1985 The American Genetic Association 76:207-208

other

Linkage of sym-2, the symbiotic specificity locus of Pisum sativum

J. P. W. Young

The author is affiliated with the John Innes Institute, Colney Lane, Norwich NR4 7UH, England. He is grateful to Diane Rushbrook for assistance.

Abstract

The gene, sym-2, which confers resistance to many strains of Rhizobium leguminosarum and was first described in Pisum sativum cv. Afghanistan, is shown to be linked (about 18 percent recombination) to the locus d, which controls axillary pigmentation. Crosses involving other pea genotypes having the same Rhizobium specificity as Afghanistan indicate that resistance in all cases is due to sym-2.


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