THE USE OF ENZYMATIC MARKERS FOR THE IDENTIFICATION OF PYRACANTHA VARIETIES.

Enzymatic phenotypes of a Pyracantha collection made of 47 taxa including new disease resistant varieties were surveyed using unidimensional gel-electrophoresis.

Pollen as well as leaves extracts were analyzed.

Among 20 tried enzymatic systems, 12 gave usable results and 5 provided very good resolving power (Aspartate aminotransferase AAT, Endopeptidase END, Superoxide dismutase SOD, Alcohol dehydrogenase ADH and Malate dehydrogenase MDH).

All taxa could be characterized and individualized by a proper profile ; the use of that technic to identify varieties proved to be efficient.

Correspondence factor analysis underlined the specific position of varieties related to Pyracantha coccinea and also that of Pyracantha angustifolia. On the contrary, other varieties make an undistinguishable group coming from different species (P.atalantioides, P.crenulata, P.crenatoserrata, …) by crossbreeding.

Any genetic analysis of isoenzymatic pattern has been carried out.

International Symposium on Selection and Breeding of Woody Ornamentals

A. CADIC, M. GALLET, I. COURTIN

https://doi.org/10.17660/ActaHortic.1992.320.24