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Published in Crop Sci 6:113-116 (1966)
© 1966 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Chlorophyll Relationships for Certain Sweet Corn Genotypes in Different Environments1

E. A. Oelke and R. H. Andrew2

Five inbred lines of sweet corn and their l0 F, hybrids were used to investigate the relationships of chlorophyll concentration over successive sampling dates to phenotype, to ethanol soluble sugars and crude protein in the leaf tissue, to dry weight, and to ear weight at 70% moisture. The inbreds were dark green, medium green, pellucid, and fine striped in appearance. Phenotypic appearance was an indication of chlorophyll concentration when plants were grown in the field and growth chamber. Correlations for chlorophyll concentration between experiments were nearly always highly significant indicating little change in rank of the inbreds and hybrids between environments. Chlorophyll concentration decreased with age in all environments. Hybrids maintained their chlorophyll concentration longer during the growing season than the inbreds and also had higher concentrations than either parent. Estimates of general and specific combining abilities indicated that inbreds with high chlorophyll concentrations gave hybrids with high chlorophyll. Little correlation was found between chlorophyll concentration and ethanol soluble sugars, crude protein, dry weight production, and ear weight.

1 Contribution from the Department of Agronomy, University of Wisconsin, Madison, Wis. Published with the approval of the Director, Wisconsin Agriculture Experiment Station. Part of a thesis submitted by the senior author in partial fulfilment of the requirements for the Ph.D. degree.

2 Formrly graduate assistant (Now Assistant Agronomist, Department of Agronomy, University of California, Rice Experiment Station, Biggs, California) and Professor of Agronomy. The authors acknowledge contributions from J. H. Torrie, Madison, to the statistical aspects and from P. W. M. John, Department of Mathematics, University of California, Davis, to the diallel analysis of this paper.

Received for publication September 9, 1965.




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Copyright © 1966 by the Crop Science Society of America.