Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 12:585-589 (1972)
© 1972 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Associations Between Chromosomal Knobs of Zea mays L. and Agronomic Performance1

R. H. Moll, W. D. Hanson, C. S. Levings, III and Yasuo Ohta2

Four polymorphic chromosome knobs in the open- pollinated variety of Zea mays L., ‘Jarvis,’ were found to be associated with effects related to plant vigor. Random inbred lines of the variety were categorized for knob constitution at each of the four knob sites. Inbreds of similar knob constitution were intermated to produce subpopulations with known knob constitution. The subpopulations were evaluated for four quantitative traits in replicated trials. Heteromorphic knob constitution was associated with greater ear height and plant height at four knob sites, and with higher yield of grain at three of the knob sites.

Key Words: Polymorphism

1 Contribution of the Department of Genetics, North Carolina Agricultural Experiment Station, Raleigh, 27607. Paper No. 3663 of the Journal Series. The work was supported in part by Public Health Service Research Grant GM11546, in part by National Science Foundation Grant G-25008, and in part by Cooperative Agreement No. 12-14-100-5623 (34) between the North Carolina Agricultural Experiment Station and Plant Science Research Division, ARS, USDA.

2 Professors and Associate Professor of Genetics and former post-doctoral fellow, respectively, North Carolina State University, Raleigh.

Received for publication January 21, 1972.


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E. V. Ananiev, R. L. Phillips, and H. W. Rines
A knob-associated tandem repeat in maize capable of forming fold-back DNA segments: Are chromosome knobs megatransposons?
PNAS, September 1, 1998; 95(18): 10785 - 10790.
[Abstract] [Full Text] [PDF]


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