ATTEMPTS TO ELUCIDATE THE GENETIC CONTROL OF OZONE SENSITIVITY IN SEEDLINGS OF Phaseolus vulgaris L.

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Abstract
Four selected cultivars of Phaseolus vulgaris L., two ozone insensitive and two ozone sensitive, were selected from 12 cultivars initially screened for use in this study. The results auggest that (a) the major alleles which express ozone insensitivity are almost fully dominant; (b) two major interacting genes control the expression of the trait; (c) there are probably an undetermined number of genes with minor effects which slightly alter the overall expression of the two major genes.Key words: Phaseolus, ozone sensitivity, genetic control, beans
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