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GENETIC VARIABILITY AND PREDICTED SELECTION RESPONSE IN TWO OPEN-POLLINATED VARIETIES OF CORN (ZEA MAYS L.) AND THEIR F1 PROGENIES
Abstract
The type of gene action for yield and other quantitative characters in corn has been the subject of considerable argument among corn geneticists for a number of years. The validity of the various questions raised by these arguments has important implications in breeding procedures which will give maximum gains from selection. If overdominance is the type of gene action of most importance, as suggested by Hull (1944, 1945), then selection for specific combining ability is desirable. If additive variance is present in significant amounts in corn populations, as suggested by many recent experiments, intra-population selection and selection for general combining ability may be more desirable.Although reciprocal recurrent selection, as proposed by Comstock, et al. (1949), is most effective for those loci exhibiting partial to complete dominance, it is effective in some degree, regardless of the type of gene action predominating. Since the question of types of gene action will remain unresolved to a large extent until critical experiments for the characterization and estimation of epistasis are designed, reciprocal recurrent selection appears to be a practical solution to the enigma of which scheme to use.
Subject Area
Genetics
Recommended Citation
COMPTON, WILLIAM AVERA, "GENETIC VARIABILITY AND PREDICTED SELECTION RESPONSE IN TWO OPEN-POLLINATED VARIETIES OF CORN (ZEA MAYS L.) AND THEIR F1 PROGENIES" (1963). ETD collection for University of Nebraska-Lincoln. AAI6400773.
https://digitalcommons.unl.edu/dissertations/AAI6400773