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Sources and inheritance of resistance to halo‐blight of Phaseolus beans
Author(s) -
TAYLOR J. D.,
INNES N. L.,
DUDLEY C. L.,
GRIFFITHS W. A.
Publication year - 1978
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1978.tb02615.x
Subject(s) - biology , phaseolus , race (biology) , cultivar , resistance (ecology) , inoculation , inheritance (genetic algorithm) , horticulture , botany , dry bean , genetics , agronomy , gene
SUMMARY Forty‐three accessions of Phaseolus vulgaris and four of P. coccineus were classified on the basis of the reaction of their primary leaves and pods to inoculation with races 1 and 2 of the pathogen Pseudomonas phaseolicola. Four groups were recognised, (1) highly resistant to race 1 only, (2) resistant to both races, (3) slightly resistant to both races or (4) susceptible to both races. Race 1 resistance was present in a number of accessions (e.g. Red Mexican UI3, Rona, Cornell 42–242). Resistance to race 1 and 2 was present in PI 150414, GN Nebraska No. 1 sel. 27, OSU 10183 and other accessions with PI 150414 in their parentage. Studies on the inheritance of resistance in Red Mexican UI3 and PI 150414 were made in crosses with various susceptible bean cultivars. A single dominant factor was responsible for race 1 resistance in Red Mexican UI3. The resistance factor in PI 150414 to races 1 and 2 behaved as a recessive in crosses with Cascade and Seafarer but was partially dominant in crosses with Gallatin 50. These findings suggest that genetic background can influence the expression of the resistance factor from PI 150414 and largely reconcile the conflicting evidence of previous investigators.