Orchid doctor

COLCHICINE: What it Is

Orchid Doctor Propagation

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 3 years ago.

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A chemical extracted from the autumn crocus; it inhibits formation of wall matter between two cells giving cells with double normal number of chromosomes. A78-606; comparative experiment reviewed; refer to A63-885+; for other sources on its use on orchids, refer to A59-838
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More The Orchid Doctor Articles under the Heading Colchicine

Colchicine Comments
COLCHICINE: And Cymbidiums Conversion rate to higher ploidy is more common than with other genera; the selection criteria is most important. AU80-49; FR90; OA78-16 0
COLCHICINE: And Dendrobiums Doubling chromosomes in meristem culture; percent of concentrations required; number of days to induce doubling of chromosomes; other data; refer to NH73(2)-12+ 0
COLCHICINE: And Production of Tetraploids High quality tetraploid cymbidiums, many already awarded now exist; probably induced by the judicious use of colchicine; breeding possibilities from them are great. AU75-190+; AU79-145; AU79-195+ 0
COLCHICINE: And Vandas Induction of polyploidy; 0.1% of solution used in test; 29% of plantlets converted to tetraploid. NH73(2)19 0
COLCHICINE CONVERSION: In the Future To provide an available bank of high class breeding clones in cymbidiums; in cattleyas, to convert triploids to hexaploids (poor plants) for back crossing to tetraploids to achieve 5N or pentaploids, the new way. AU79-196 0
COLCHICINE: In Cymbidiums A common laboratory mutagen it can be used on sterile plant materials to double the number of chromosomes; the present confusion about conversion analyzed; refer to OR81-171 0
COLCHICINE: Results to Date Results of use for conversion are not consistent or concrete; untreated seedlings give just as good results as treated ones; it is limited to the extent that it can occasionally produce larger flowers at the expense of other factors. AU79-139+; refer to OB1-192 0
COLCHICINE: Used to Change the Ploidy of Clones A problem arises in reconciling the identification of the new chemically treated result with the original clone; some growers designate the new result with "4N", but the new clone may not be tetraploid. OA77-44+; OA77-47+; OA77-82 0

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  1. 2016 11 03 Jeanne M Uzar commented on topic "Looking for Plant Identification" by Jeanne M Uzar
  2. Image Carol Holdren commented on topic "Yellow leaves" by Kevin Fernandez
  3. Image Carol Holdren commented on topic "details for care. Food, fan location etc" by Karen Kaye
  4. Edward Zapata commented on topic "Help with ID, Please & Than You! " by Elizabeth Padilla
  5. 2016 11 03 Jeanne M Uzar commented on member plant Bulb. Crownpoint by Jeanne M Uzar
  6. Image Carol Holdren commented on topic "One And The Same?" by John Small
  7. Image Carol Holdren commented on member plant Rth. Lemon Drop by Christopher Dolan
  8. John Small commented on orchid Eny. Golden Sunburst
  9. Image Carol Holdren commented on topic "orchid search" by Ashley Matherne
  10. Edward Zapata commented on member plant C. purpurata var. Flamea x sanguinea by Carol Holdren