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Published in Crop Sci 15:668-670 (1975)
© 1975 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Quantitative Gene Action for Protein Content in Oats1

H. S. Sraon, D. L. Reeves and M. D. Rumbaugh2

The objectives of this study were to determine gene action, heritability, and number of effective factors controlling protein content in oats (Avena spp.). One Avena sterilis L. and three A. sativa L. cultivars were crossed in a diallel, including reciprocals, with protein of 16.1 to 24.4%. The data showed additive gene action for groat protein percentage. Partial dominance for low protein percentage was observed. Narrow sense heritability was 41%. Protein percentage was inversely related to grain yield. The Avena sterilis L. parent exhibited recessiveness for high protein content.

Estimation of the number of effective factors controlling protein content varied from 1 to 25 depending upon the genetic diversity of the parents and direction of the cross.

Key Words: Avena spp. • Diallel analysis • Protein percentage • Heritability • Effective factors

1 Contribution from the S.D. Agric. Exp. Stn., Brookings, S.D. as journal paper no. 1,305. Submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree. This investigation was supported in part by a research grant from the Quaker Oats Co., Chicago, III. Protein analyses were provided by the USDA Natl. Oat Quality Lab., Madison, Wis.

2 Post-doctoral research associate, associate professor, and professor, respectively, Dep. of Plant Sci., S.D. State Univ., Brookings, SD 57006.

Received for publication September 3, 1974.




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