PJB-2010-222
MAPPING GENE FOR BACTERIAL BLIGHT (RPG4 LOCUS) IN SOYBEAN
FARHATULLAH1*, ROBIN W. GROOSE2, RAZIUDDIN1, M. AKMAL1 AND MIAN INAYATULLAH1
Abstract
Rpg4 gene in soybean. Rpg4 also confers resistance to Pseudomonas syrinagae pv. tomato strains expressing the avirulence gene-avrD. The genetic linkage studies reported here were undertaken to advance the construction of the classical genetic map of soybean. Hybridizations were made in the green house and the F2 generation was produced and classified. Data were tested by chi-square for single-factor segregation and recombination estimates were computed with computer program, Linkage-1. The Rpg4 locus is controlling bacterial blight resistance to Pseudomonas syrinagae pv. glycinea race 4 segregated independently of the y12, y23, fr1, y13, pb, y9, fr2, Fr3, w1, w4 and y10. The chi-square for the Rpg4 and y9 indicated linkage. The recombination frequency between the Rpg4 and y9 loci was estimated at 29.2 + 8.5 cM.
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