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Using germinating seedlings of Schizonepeta tenuifolia as materials,the optimum concentration and treatment time of colchicine induced chromosomal ploidy variation were carried out,the agronomic characters of polyploid plants were investigated and compared. The results showed that 0. 10% colchicine solution was the most beneficial to tetraploid production at the growth point 3 d of Schizonepeta tenuifolia seedlings, and the induction rate reached 1. 15%. The number of chromosome in the root tip of the mutant plants was 2n = 4x = 24. Compared with diploid plants, tetraploid plants had thicker leaves, darker green leaves, more dense ears and larger seeds, and the content of effective components in tetraploid plants was higher than that in diploid plants. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)