TETRAPLOIDS: Meaning

Orchid Doctor Propagation

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 4 years ago.

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A clone in which the chromosome count is four times the haploid or standard number; generally indicated by 4n. AU78-47
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Tetraploids Comments
TETRAPLOIDS: Chance, in Cymbidiums A prolific source of these has been through the mass tissue culture process of recent years which has produced many sports. A78-1022; thousands of them are a complete failure as parents. AU79-139 0
TETRAPLOIDS: Converted, in Cymbidiums In 1966 Donald Wimber presented a paper on the conversion of diploids into tetraploids by use of colchicine; many plants are now available. A78-1022; refer to AU80-109+They never revert to the diploid. OA75-214 0
TETRAPLOIDS: Cymbidiums A comparison with diploids: the tetraploid flower is bigger, the petals and sepals wider, so is the column; the shape is improved; the tissue of all parts is thicker and color is thereby intensified; better reflection of light results from heavier substance; spikes and stems are heavier and stronger; flowers have longer life on or off the stem, with or without water; they suffer less damage from handling and shipping. OA78-23 0
TETRAPLOIDS: In Cymbidiums "4n's" have advantages and disadvantages for the orchid world; the colchicine-converted ones have caused a lot of confusion in the orchid world; refer to OR81-169They are the heaviest producers of long spikes of large blooms on quick-growing strong plants; flowers become thicker in tissue, with wider petals including lip and column; an illusion of greater size; racemes shorter and fatter cause a less attractive arrangement of flowers on them; fewer flowers per spike. OA79-8 0

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  1. Darrin Duling asked question Stenocoryne x Bifrenaria = Grex name? in category General Discussion
  2. Charles Vella started topic Orchid list Cold/Warm in category General Discussion
  3. Jan E Teitsworth asked question Can anyone identify this orchid? in category Oncidium Alliance
  4. Marianna Hynson asked question Need Help Identifying this Orchid in category General Discussion
  5. Sandi Block-Brezner asked question Brassocattleya hybrid? in category General Discussion

New Comments

  1. Charles Vella commented on topic "Orchid list Cold/Warm" by Charles Vella
  2. Sandi Block-Brezner commented on topic "Brassocattleya hybrid?" by Sandi Block-Brezner
  3. Robert H. Findlay commented on topic "looking for info about an unregistered cattleya" by bob lewis
  4. Robert H. Findlay commented on member plant Paph. Jessie by Robert H. Findlay
  5. james Hu commented on orchid Den. vannouhuysii
  6. Chase Hubbard commented on member plant Hknsa. Sogo Doll by Tom Kuligowski
  7. Colin Campbell commented on topic "Can anyone identify this orchid?" by Jan E Teitsworth
  8. Sharie Heckaman commented on member plant NEW HYBRID (Lc. Cornelia 'Floralia' x Lc. Moonlight Dream 'SVO Moonlight Kiss' AM/AOS) var. Compact by Vickie Seibert
  9. Carol Holdren commented on member plant Lc. Memory of PienPien Wei by Robert Rand
  10. Robert Rand commented on member plant Bc. Yellow Bird by John Small
  11. Sharie Heckaman commented on member plant Btcm. Hwuluduen Chameleon by Diana Sammy
  12. Sharie Heckaman commented on member plant (C. Leoloddiglossa var. coerulea 'SVO Baby Blue' x C.Interglossa aquinii var. coerulea 'SVO') 'SVO' by Joshua J Peterson
  13. Sandi Block-Brezner commented on topic "Need Help Identifying this Orchid" by Marianna Hynson
  14. Sandi Block-Brezner commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  15. Vickie Seibert commented on member plant Phal. Ember 'Carmela' by Vickie Seibert
  16. John Small commented on member plant B. nodosa ''H&R' 4N x 'Mas Mejor'' by John Small
  17. Robert H. Findlay commented on topic "Parentage of RLC Memoria Emma Chen" by Dean Haas
  18. Dean Haas commented on article "Have Local Orchids to Sell or Trade?" by Sys Admin
  19. Eileen Pryor commented on member plant Den. chrysotoxum by Tom Kuligowski
  20. Gustavo da Silva commented on member plant Max. callichroma by Gustavo da Silva