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Changes in Seed Vigour of Sweet and Super Sweet Corn Hybrids as Affected by Storage Conditions  

Lee Suk-Soon (School of Biological Sciences, College of Natural Resources, Yeungnam Univ.)
Yun Sang-Hee (School of Biological Sciences, College of Natural Resources, Yeungnam Univ.)
Yang Seung-Kyu (School of Biological Sciences, College of Natural Resources, Yeungnam Univ.)
Hong Seung-Beom (Dept. of Oriental Medicine Resources, Asia University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.51, no.5, 2006 , pp. 432-439 More about this Journal
Abstract
An experiment was conducted to characterize the seed vigour of sweet (su) and super sweet (sh2) corn seeds stored at different temperatures and relative humidities (RH). Hybrid seeds of Early Sunglow ${\times}$ Golden Cross Bantam 70 (su) and Xtrasweet 82 ${\times}$ Fortune (sh2) were stored at different temperatures ($5\;and\;15^{\circ}C$) and RH(70 and 85%) for 10 months. Results of the experiment show that seed deterioration of super sweet corn was much faster than that of sweet corn under all storage conditions. Germination rate of sweet corn seeds at $25^{\circ}C$ and emergence rate in cold test showed similar patterns. Emergence rate of super sweet corn in cold test was significantly lower than the germination rate at $25^{\circ}C$. Germination rate of both sweet and super sweet corns was positively correlated to the emergence rate in cold test, but the correlation coefficient of super sweet corn was much lower compared to the sweet corn. This implies that the viability of super sweet corn seeds should be tested in the cold test to estimate field emergence rate. Seeds of sweet corn could be stored for 5 months under all storage conditions without significant seed deterioration, while those of super sweet corn should be stored at low temperature and RH. The emergence rate of sweet corn in cold test was not correlated to the leakage of total sugars, electrolytes or ${\alpha}-amylase$ activity, while that of super sweet com was positively correlated to the ${\alpha}-amylase$ activity, negatively correlated to the leakage of electrolytes, and was not correlated to the leakage of total sugars.
Keywords
sweet corn; super sweet corn; seed storage; temperature; relative humidity (RH); sugar leakage; electrolyte leakage; ${\alpha}-amylase$ activity;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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