Considerations Over Regulations for Clonal Forestry : Actual Problems of the Legislation of Forest Reproductive Material and the Need for Harmonization of Rules at an International Level

1992

S. 53-59

8 Lit. Ang.

Unselbständiges Werk

200065047

Present possible procedures for production and afforestation with vegetative material are presented in the frame of the new concept of "clonal forestry". "Clonal mixtures" as pooosed to "Distinct clones" (poplar) are considered. Within clonal mixtures, "Bulk varieties" are distinguished from "Multiclonal varieties" which themselves are subdivided into: - "Plus multiclonal varieties" with clones from plusplants selected at the nursery stage; - "Elite multiclonal varieties" with best clones from clonal tests at the forest stage; - "Sub-elite multiclonal varieties" with best clones from clonal tests at the nursery stage. A philosophy for possible regulations is proposed. To prevent most pathological and genetic risks, a sufficient number of unrelated clones, in connection with the rotation period, should be used in clonal mixtures: a minimum of 50 clones seems necessary while a number of 50-100 seems resonnable and sufficent. New proposals of regulations should stay compatible with existing regulations of EEC and OECD and could be presented in the form of an additional appendix. Modifications of OECD or EEC regulations should be made in close coordination, with attempts to unifie these two similar systems. "Category" and "type" of materials should be clearly distinguished and mentioned on certificates. The category of the vegetative reproductive material should be that of the generative basic material from which it derives. Exemples of application of these proposed rules are given.