Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 11:536-538 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Diallel Analyses of Kernal Carbohydrates in Sweet Corn (Zea mays L.)1

R. W. Rosenbrook and R. H. Andrew2

Kernel samples from all possible F1 combinations among eight inbred lines of sweet corn, including reciprocals, were analyzed quantitatively for reducing sugars, sucrose, and water-soluble polysaccharides. The F2 kernels produced on a diallel set of F1 plants involving five of the inbreds were analyzed also.

Analysis of covariance was used to remove the effects of maturity (percent moisture) on the carbohydrate fractions. Genotypic variability for reducing sugars, sucrose, and water-soluble polysaccharides was partitioned into general and specific combining ability variances. Highly signiifcant GCA variances and nonsignificant SCA variances for each character indicate the inheritance of these carbohydrate fractions is highly additive. GCA effects corresponded closely in relative rank with inbred means.

Key Words: General combining ability • Specific combining ability • Sucrose • Reducing sugars • Water-soluble polysaccharides

1 Contribution from the Department of Agronomy, Wisconsin Agricultural Experiment Station, Madison, Wisconsin 53706. Research supported by the Research Division, College of Agricultural and Life Sciences, and by the Wisconsin Alumni Research Foundation through the Research Committee of the Graduate School, University of Wisconsin, Madison. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree.

2 Formerly Fellow in Agronomy (now Research Station Manager, Pioneer Hi-Bred International, Inc., Mankato, Minn. 56002) and Professor of Agronomy, Wisconsin Agr. Exp. Station, Madison 53706. The authors gratefully acknowledge advice of Dr. J. H. Torrie in the statistical analyses and of Dr. Dale Smith in the laboratory analyses.

Received for publication December 17, 1970.




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