Articles
DIVERSITY ASSESSMENT AMONG AND WITHIN CARDOON ACCESSIONS USING MORPHOLOGICAL CHARACTERIZATION
Article number
983_6
Pages
63 – 68
Language
English
Abstract
In Tunisia, local germplasm of wild cardoon (Cynara cardunculus L. var. sylvestris (Lam.) Fiori) has been currently damaged by severe genetic erosion, pollution, urbanization and bad farming practices.
The aim of the present study was to prospect, collect, assess morphologically six populations of wild cardoon from several areas in north Tunisia.
The characterization of 60 individuals (10 samples per each accession) was performed utilizing 20 morphological traits following UPOV (International Union for the Protection of New Varieties of Plant) descriptors for artichoke (since there are no descriptors edited for cardoon). In addition, several specific characters for cardoon were chosen as descriptors.
Principal Components Analysis revealed more diversity within each accession.
Cluster analysis was carried out by UPGMA method with a Gower General similarity Coefficient.
It showed that 60 samples could be classified into major groups.
The absence of significant divergence suggests a narrow genetic base among several individuals despite their distinctiveness of geographic origin.
The aim of the present study was to prospect, collect, assess morphologically six populations of wild cardoon from several areas in north Tunisia.
The characterization of 60 individuals (10 samples per each accession) was performed utilizing 20 morphological traits following UPOV (International Union for the Protection of New Varieties of Plant) descriptors for artichoke (since there are no descriptors edited for cardoon). In addition, several specific characters for cardoon were chosen as descriptors.
Principal Components Analysis revealed more diversity within each accession.
Cluster analysis was carried out by UPGMA method with a Gower General similarity Coefficient.
It showed that 60 samples could be classified into major groups.
The absence of significant divergence suggests a narrow genetic base among several individuals despite their distinctiveness of geographic origin.
Authors
I. Ben Ammar, B. Al Mohandes Dridi, F. Harzallah-Skhiri, S. Ibn Maaouia Houimli, N. Jabbes, A. Issa
Keywords
Tunisian populations, wild cardoon, morphological variability, cluster analysis, germplasm collection, Cynara cardunculus L. var. sylvestris (Lam.) Fiori
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