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Published in Crop Sci 13:8-10 (1973)
© 1973 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Yield and Yield Component Heterosis in Avena Hybrids1

B. R. Hathcock and M. E. McDaniel2

Appreciable graln-yield heterosis was observed in several close-planted oat (Avena spp.) hybrids grown at two locations in Texas in 1968. One hybrid surpassed the best pure-line entry by more than 35% at each location. Heterosis for grain yield generally was greater than that for individual grain-yield components. The yield component, seeds per panicle, showed the greatest and most consistent heterotic response. In most crosses, heterosis for grain yield was drastically reduced in the F2.

Key Words: Oat hybrid vigor

1 Contribution from Department of Soil and Crop Sciences, Texas Agricultural Experiment Station, College Station, Texas 77843. Part of a dissertation submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree at Texas A&M University.

2 Assistant Professor of Agronomy, University of Tennessee at Martin, Martin, Tenn. 38237 (formerly Graduate Assistant, Department of Soil and Crop Sciences, Texas A&M University), and Associate Professor, Department of Soil and Crop Sciences, Texas A&M University.

Received for publication February 4, 1972.




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Copyright © 1973 by the Crop Science Society of America.