The Journal of Heredity 1994:85(1):1-3
© 1994 The American Genetic Association 85:1-3
research-article |
Inheritance of Non-Nodulation and Ineffective Nodulation Mutants in Common Bean (Phaseolus vulgaris L.)
Agriculture Canada, Research Station Harrow, Ontario, N0R 1G0, Canada
Abstract
Two nodulation mutants lacking effective nodules were induced in common bean (Phaseolus vulgaris L.) by treating seeds with ethyl-methane sulfonate. Inheritance of ineffective nodulation (IN) and non-nodulation (NN) was determined in crosses with wild types (W). Both nodulation characteristics were controlled by single recessive genes. Complementation tests, including nitrate-tolerant supernodulation (NTSN) mutants, revealed that all three nodulation types were under nonallelic control with distinct function. The gene symbols nie and nnd-2 were assigned for IN and NN types, respectively. A gene nod previously assigned for NTSN of common bean lines R32 and SV145 is changed to nts. Recessive epistasis occurred with nie being epistatic to nts, and nnd-2 being epistatic to nts and nie.
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