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Published in Crop Sci 11:698-701 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Relationship of Maize Characters with Yield in Testcrosses of Inbreds at Different Plant Densities1

M. A. El-Lakany and W. A. Russell2

The objective was to study the effects of different plant stand densities on the relationships of important plant and ear characters to grain yield for testcrosses of maize (Zea mays L.) inbred lines. The inbred lines, in the F5 generation and originating from M14xC103, were evaluated in two groups, based on high and low hybrid performance in an earlier study. Our study was done in six environments with low, intermediate, and high stand densities in each environment. At the low density only plant and ear heights were correlated significantly with yield; at the intermediate density ear diameter and shelling percentage, in addition to plant and ear heights, were correlated significantly with yield; at the high density all characters except 300-kernel weights and dates of pollen shed and silk emergence were correlated significantly with yield.

Key Words: Zea mays L. • Variety testing

1 Joint contribution: Plant Science Research Division, Agricultural Research Service, U. S. Department of Agriculture, and Journal Paper No. J-6850 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 1575. (Part of a thesis presented by the senior author to Iowa State University in partial fulfillment of the requirements for the Ph.D, degree).

2 Former Graduate Student (now at Alexandria, Egypt, U.A.R.) and Professor, Iowa State University, Ames, Iowa 50010.

Received for publication March 8, 1971.


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F. J. Betran, D. Beck, M. Banziger, and G. O. Edmeades
Genetic Analysis of Inbred and Hybrid Grain Yield under Stress and Nonstress Environments in Tropical Maize
Crop Sci., May 1, 2003; 43(3): 807 - 817.
[Abstract] [Full Text] [PDF]


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