Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 11:680-681 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Genetic Variance in Autotetraploid Maize1

C. S. Levings, III, J. W. Dudley and D. E. Alexander2

This study represents the first attempt to characterize genetic variability in an autotetraploid maize population. Estimates of additive and digenic genetic variance were obtained from a sib analysis in autotetraploid maize (Zea mays L.), Synthetic B. Estimates of additive genetic variance larger than one standard error were obtained for yield, ear length, ears per plant, plant height, and percent oil. Positive estimates of digenic variance larger than one standard error were found only for plant height. The estimate of additive genetic variance for yield is smaller in the autotetraploid, Synthetic B, than is norreally encountered in diploid populations.

Key Words: Zea mays (L) • Additive variance • digenic variance • Sib analysis

1 Joint contribution from the North Carolina State University Agricultural Experilnent Station, Raleigh, N.C. and the Agronomy Departmeut, University of Illinois, Urbana. Paper Number 3394 of the Journal Series of the North Carolina State University Agricultural Experiment Station, Raleigh. This research was supported in Part by NIH Grant GMl1546, Rockefeller Grant No. RF57012 and the Illinois Agricultural Experiment Station.

2 Associate Professor of Genetics, North Carolina State University, Raleigh, and Professors, Plant Genetics in Agronomy, University of Illinois, Urbana.

Received for publication February 24, 1971.




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