Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 12:423-425 (1972)
© 1972 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Combining Ability for Grain Yield, Percent Protein, and g Lysine/100 g Protein in a Nine-parent Diallel of Sorghum bicolor (L.) Moench1

F.C. Collins and R.C. Pickett2

Parents and one set of F1 hybrids from a nine line diallel of Sorghum bicolor (L.) Moench were evaluated for combining ability for grain yield, percentage protein, and g L/100g P using the Griffing analysis. The ranges in performance were 31 to 159 q/ha for yield, 9.2 to 18.2% for protein and 1.74 to 2.74% for lysine in the protein. General (GCA) and specific (SCA) combining ability were found to be important for all three characters. The GCA:SCAra tio of mean squares indicated that additive gene action was more important for protein and less important for yield and g L/100g P. One parent had large GCA effects for all three characters. Several hybrids exhibited heterosis for yield, but only a few hybrids showed heterosis for percentage protein while no positive heterosis was observed for gL/100gP. Protein was negatively correlated with gL/100gP and yield. Yield and gL/100gP were positively associated.

Key Words: Nutritional quality • Inheritance • Gene action

1 Contributiou from the Purdne University Agr. Exp. Station, Lafayette, Indiana 47907. Joornal paper No. 4480. Part of a thesis submitted by the senior author in partial fulfillment of the requirements of the Ph.D. degree. This research was supported by the U.S. Agency for International Development through Contract entitled Inheritance and Improvement of Protein Quality and Content in Sorghum bicolor (L.) Moench.

2 Contributiou from the Purdne University Agr. Exp. Station, Lafayette, Indiana 47907. Joornal paper No. 4480. Part of a thesis submitted by the senior author in partial fulfillment of the requirements of the Ph.D. degree. This research was supported by the U.S. Agency for International Development through Contract entitled Inheritance and Improvement of Protein Quality and Content in Sorghum bicolor (L.) Moench.

Received for publication January 24, 1968.




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Copyright © 1972 by the Crop Science Society of America.