The meristem culture

Recently, a vegetative method of propagation has gained particular importance. It is technically extremely complicated and generally not applicable for the orchid lover, as it mainly requires laboratory work. In some respects, however, this method of propagation is of particular interest in its effects. As a result, it is appropriate, to discuss at least the basics and the technique of this method.

In the course of the breeding work on orchids, the successes increased increasingly. The diversity of the offspring from a cross became greater and greater, the more complicated it was. The best plants in each case, which came close to the breeding goal or fulfilled it, were fixed. Usually there were very few specimens out of the crowd, which came from a seed pod. They were always very popular and represented clones, which are now continuously propagated by division and, due to the ineffectiveness of vegetative propagation, continue to be highly valued in most orchids. Even repeating a successful cross is not entirely certain of producing the same results, because varieties of a species with an increased number of chromosomes are often used. The u.U. The very great diversity of the offspring is due to the very large number of hereditary factors, which the species and even more the complicated hybrids exhibit. The combinations that arise from them in the event of renewed hybridization result in a variety of manifestations, which can be confusing, is genetically but certainly justified. The attempt, to genuinely increase high-quality breeding results through seeds, must remain unsuccessful. The inherited traits inherent in them result in completely different offspring when they are united with another species or hybrid. Some of them will be above average, the great majority will u. U. be unsatisfactory; perhaps in value it does not correspond to the expenditure of the long development period. Commercially, this can be of great importance, for example then, if a certain flowering date is decisive as a breeding goal in addition to other properties. Does this lie within wide limits in the offspring, so the sales opportunity can be greatly reduced. Similar considerations can be made with respect to flower color, The size and shape of the flowers or other properties can be decisive for the desire, to achieve complete hereditary offspring. This is possible in theoretically unlimited numbers thanks to the meristem culture. However, there is a limitation, that the method was initially only used by Cattleya, Cymbidium, Calanthe, Dendrobium, Miltonia, Odontoglossum, Dentistry, Oncidium, Vuylstekeara and Zygopetalon is applicable. In Paphiopedilum and all monopodial orchids, like Vanda, Renanthera, Phalaenopsis, u. a. the procedure cannot be carried out or has not yet been determined. In the meantime, the term "mericlones" has been coined for the young plants obtained through meristem propagation and has been introduced internationally.

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