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Published in Crop Sci 12:35-37 (1972)
© 1972 Crop Science Society of America
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Heterosis and Combining Ability in Southern Soft Red Winter Wheats1

M. J. Bitzer and S. H. Fu2

Six southern soft red winter wheats (Triticum aestivum), ‘Andnox,’ ‘Bledsoe,’ ‘Blueboy,’ ‘Coker 67-14,’ ‘Ga 1123,’ and ‘Hadden,’ were crossed in diallel fashion. The objective of this study was to determine the potential of these soft red winter wheats in hybrid combinations for possible commercial hybrids. The best combiners in this group might possibly be the best parents for further testing of other hybrids. Three F1 hybrids yielded significantly higher than the better parent of each respective cross. Heterosis levels exceeded 25% for grain yield, all Fl's averaged 6, 5, 5, and 17% above the average parent values for number of spikes, kernel weight, kernels per spike, and grain yield, respectively. General combining ability was the major component of variation. All grain quality characters were slightly improved in the F1 hybrid. Blueboy was the best general combiner in this group of parents.

Key Words: Small plot • Hybrid wheat • Quality • Diallel cross

1 Contribution from the Agronomy Department, University of Georgia, Athens, Georgia. Published with the approval of the Director of the Georgia Agricultural Experiment Station as Journal Series No. 1074. Partial data from a thesis submitted by the junior author in partial fulfillment of the requirements for the M.S. degree.

2 Assistant Professor of Agronomy (now University of Kentucky) and Former Graduate Student (now Graduate Student in Plant Pathology) in the Agronomy Department, Unversity of Georgia, Athens, Ga. 30601.

Received for publication May 25, 1971.




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