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This article in AJ

  1. Vol. 64 No. 6, p. 749-751
    Received: Feb 10, 1972

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Use of the Thermogradient Plate as an Aid in Determining the Relative Vigor of Sweet Corn (Zea mays L.)1

  1. D. F. Cole2



Eighteen lots of sweet corn seed (Zea mays L.) were germinated on a one-way thermogradient plate to establish a relative index for seed vigor. This index is based upon the rate and total germination over a temperature range of 13 to 43 C. Differences between lots were maximum 2 days after planting. The rankings after 4 and 7 days were the same. Significant correlations were obtained between the vigor index established with the thermogradient plate and data from percent emergence at 25, 35, 15:25 C in a controlled environment and rapid aging of 0, 4, and 7 days. The significant correlations indicate that the thermogradient plate can be used to detect differences in seed vigor of different lots of sweet corn in 4 days.

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