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Published in Crop Sci 10:429-432 (1970)
© 1970 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Combining Ability Estimates in Arachis hypogaea L. I. F1 Seedling Responses in a Controlled Environment1

R. C. Parker, J. C. Wynne and D. A. Emery2

The feasibility of identifying superior parents of peanuts (Arachis hypogaea L.) by testing Fl hybrids grown under controlled conditions was investigated. Estimates of combining ability, maternal, and reciprocal effects among 15 F1 hybrids were determined for 17 seedling characters. Six lines of cultivated peanuts were crossed in all possible combinations to form a 6 x 6 complete diallel set. The lines included Valencia, Virginia, and Spanish types from three geographic regions of South America. Statistically significant variances were found for general combining ability for 11 of the 17 characters. Estimates of specific combining ability for three characters were statistically significant. The greatest portion of genetic variance was associated with general combining ability. Maternal and reciprocal effects were significant for two and one characters, respectively. Specific crosses among certain types had higher means than expected based on mid-parent values for several characters.

Key Words: Heterosis • early generation testing • Phytotron • Peanuts • Maternal effects • Reciprocal effects

1 Paper Number 3076 of the Journal series of the North Carolina State University Agricultural Experiment Station, Raleigh, N. C. 27607. The results reported herein were compiled by the senior author in partial fulfillment of the requirements of the M.S. degree at North Carolina State Univ. The Investigation was supported in part by a research grant from the North Carolina Peanut Growers Association.

2 Formerly graduate research assistant, North Carolina State University; Instructor; and Prof. of Crop Science, North Carolina State University, Raleigh, N.C., respectively.

Received for publication February 11, 1970.




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