Abstract
Data obtained from the measurement of drought tolerance by several methods in six by six sweet corn (Zea mays L.) diallel crosses constituted the basis for an analysis of the inheritance of drought tolerance. Variance-covariance regressions imply that, within the sample measured, the inheritance of drought tolerance in sweet corn follows a pattern of partial to nearly complete dominance. Combining ability estimates indicate that inbreds which exhibit high general combining ability for drought tolerance produce the greatest number of drought-tolerant hybrids. Frequency distributions of germination percentages for the F2 and both F1 backcross generations germinated in mannitol solution suggest that drought tolerance in sweet corn is under the genetic control of no less than three gene pairs, although in some families only one major gene may be segregating.
Published Version
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