Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 11:106-108 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Predicting Double-Cross Sugarbeet Hybrid Performance1

Garry A. Smith and R. J. Hecker2

Thirty-five double crosses, 15 single crosses, and six red beet top crosses were developed from six inbred lines and used to tesl; five methods of predicting double-cross sugarbeet (Beta vulgaris L.) hybrid performance. The mean of the four nonparental single crosses of any double cross was found to be the most consistent method for predicting root yield and percent sucrose. Percent purity was best predicted by the mean of all six single crosses of the parents iinvolved in any double cross. However, predictive capabilities of five methods studied were not greatly different. There was little relationship between the correlation cofficients and the percentage of accurately predicted top performing hybrids.

Key Words: Cytoplasmic male sterility • Hybrid sugarbeet yield • Combining ability

1 Joint Contribution of the Crops Research Division, Agriucultural Research Service, U.S. Department of Agriculture the Colorado Agricultural Experiment Station, and the Beet Sugar Development Foundation. Published with the approval of the Director of the Colorado Agricultural Experiment Station aas Scientific Series No. 1551.

2 Research Geneticists, Crops Research Division, Agricultural Research Service, U.S. Department of Agriculture, Fort Collins, Colorado 80521.

Received for publication July 31, 1970.




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