Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1958
Published in Agron J 50:541-544 (1958)
© 1958 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Relative Importance of Test Sequence for General and Specific Combining Ability in Corn Breeding1

J. H. Lonnquist and M. D. Rumbaugh2

Synopsis: Lines selected for specific combining ability were found to represent a random sample with respect to general combining ability when compared with an unselected group of lines from the same original source using a broad gene base tester. The data support the common practice of testing new lines first for general combining ability, followed by tests for specific combining ability. Population improvement was greater when selection was based on a broad gene base tester.

1 Contribution from the Dept. of Agronomy, Nebraska Agr. Exp. Sta., Lincoln. Published with the approval of the Director as paper No. 855, Journal Series, Nebraska Agr. Exp. Sta.

2 Agronomist; and formerly Graduate Student, University of Nebraska, now Assistant Agronomist, Colorado State University; respectively.

Received for publication January 26, 1958.




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Copyright © 1958 by the American Society of Agronomy.