Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 24:341-344 (1984)
© 1984 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Relationship of Sunflower Germination and Vigor Tests to Field Performance1

M. N. Anfinrud and A. A. Schneiter2

Currently, only the standard germination test is used to evaluate sunflower (Helianthus annuus L.) seed quality. Accurate evaluation of seed quality and related field performance are difficult to obtain with this test since it determines germinability of seed under optimum conditions. Additional seed quality evaluations such as vigor tests, are often valuable in estimating seed quality. Common tests of seed vigor such as germination at cool temperatures, accelerated aging, cold soil, seedling vigor classification, seedling growth rates, seed leachate electrical conductivity, tetrazolium, and mitochondrial efficiency were evaluated to determine their applicability for evaluating sunflower seed quality. Percent seedling emergence in the field was compared with laboratory vigor test results to determine which laboratory method(s) most accurately evaluated seed-seedling vigor of sunflower. Seed leachate electrical conductivity tests, seedling vigor classification, germination at 10°C, and accelerated aging tests resulted in significantly higher correlations with percent seedling emergence in the field than did the germination test at 21°C.

Key Words: Seed quality • Stand establishment • Seed vigor • Seed leachate electrical conductivity • Tetrazolium • Accelerated aging • Mitochondrial efficiency

1 Contribution from the Agric. Exp. Stn., North Dakota State Univ., Fargo, N.D. Contribution no. 1267. This research was supported in part by a grant from the North Dakota Sunflower Council and the Sunflower Assoc. of Am.

2 Former graduate research assistant now research agronomist for Seedtec Fargo, ND 58102, and professor of agronomy, Dep. of Agronomy, North Dakota State Univ., Fargo, ND 58105.

Received for publication December 24, 1982.




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Copyright © 1984 by the Crop Science Society of America.