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Thesis (M.S.)—University of Nebraska—Lincoln, 1972. Department of Agronomy.


Copyright 1972, the author. Used by permission.


Heat and drought tolerance are important factors in worldwide crop production. There are differences in corn in the ability to grow and yield in arid and semiarid regions. Resistance to high temperature and drought are therefore important factors to consider in the development of new varieties for those regions.

In a breeding program it is convenient to have some simple, inexpensive and quick means of identifying genotypes with high heat and drought tolerance. Adequate screening techniques that give results that correspond to field responses would facilitate identification of the desired genotypes in relation to heat and drought.

Little specific breeding for heat and drought tolerance has been carried on because of the complexity of the problem as well as the lack of knowledge of the nature of plant reactions to different environmental stresses.

The present investigations were conducted to study the feasibility of breeding for heat and drought tolerance in corn, using laboratory techniques that seemed practical for screening purposes.

Advisors: C. Y. Sullivan and W. A. Compton