Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 14:67-69 (1974)
© 1974 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Inheritance and Combining Ability for Oil Content in Oats (Avena sativa L.)1

C. M. Brown, Andrew N. Aryeetey and S. N. Dubey2

Analyses of F1 and F2 populations from crosses involving eight oat (Avena sativa L.) parents differing widely in oil content revealed that oil content was highly heritable, with broad-sense heritability values usually above 70%. A combining-ability analysis showed that a large part of the phenotypic variation was associated with general combining ability, although significant specific combining ability occurred in several crosses. Differences between F1 hybrids and between F2 populations from reciprocal crosses were nonsignificant, indicating the absence of cytoplasmic control. Polygenic control was evident since the F2 distributions were approximately normal. Mean oil contents of seed from F1 and F2 populations were usually near midparental values. Our results suggest that considerable genetic gain would be expected from phenotypic selection for oil content in oat seeds.

Key Words: Oat breeding • Genetics • Diallel analysis • Genetic diversity

1 Contribution from the Department of Agronomy, University of Illinois, Urbana, IL 61801. This work was supported by funds from the Illinois Agricultural Experiment Station.

2 Professor of Agronomy, University of Illinois, and former graduate students, University of Illinois, Urbana, IL 61801.

Received for publication June 21, 1973.


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