Incompatibility as a new method for identification of pyrethrum clones

✍ Scribed by J. G. Brewer; J. E. Parlevliet

• Book ID: 104756423
• Publisher: Springer
• Year: 1969
• Tongue: English
• Weight: 369 KB
• Volume: 18
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00397778

✦ Synopsis

Pyrethrum clones cannot be satisfactorily identified by morphological traits, or by contents or types of pyrethrins.

In pyrethrum a sporophytic incompatibility system operates. Most clones are strongly self-incompatible and cross-compatible. This was used as the basis of a revised identification system. It is assumed that in self-incompatibility and cross-compatibility the clones are not identical, in self-incompatibility and reciprocal cross-incompatibility the clones are identical. To test this assumption 128 different genotypes were selfed and crossed in 86 combinations. Only two genotypes (1.6 ~) were selfcompatible and only one cross (1.2 ~) was reciprocally cross-incompatible.

Since only a restricted number of clones is recommended and therefore issued, the incompatibility ,test together with morphology, especially of the flower, ensures an entirely satisfactory identification. Two applications are given.