Abstract
Analysis of differentiation (genetic diversity and related relationships) among 22 landrace (Ficus carica L. sativa) and 2 wild form (F. carica L. caprificus) accessions of fig growing under the same environmental conditions in the Palestinian Fig Collection, Til, Nablus, Palestine, using PCR-based Random Amplified Polymorphic DNA (RAPD) and pomological markers, revealed considerable genetic diversity. The phenotypic analysis shows that pomological traits were permitted to evaluate morphological variability of fig landraces. The Jaccard similarity coefficient between landraces was determined by cluster analysis using the UPGMA method. Based on the genetic relationships among genotypes as illustrated by the dendrograms, generated from pomological and RAPD data by UPGMA clustering method, the following 12 genotypes: Qaisi, Mwazi, Barqawi, Inaqi, Swadi, Kharobi, Hmadibiadi, Sfari, Khdari, Biadi, Qrawi, and Slati, may be considered as distinct landraces. The remaining genotypes may be considered as synonymous (4) (Hmadi and Hmari, and Ajloni and Adloni), or closely related (6) landraces (Zraqi and Ghzali, Blati and Neami, and Qraee and Khurtmani). The wild fig forms clustered together and may be considered as distinct genotypes. Clustering patterns obtained from the combined (pomological and RAPD) markers had higher discriminatory power to discriminate fig landraces than using either pomological or RAPD markers alone. These results proved the importance of both pomological and RAPD markers to elucidate in part denomination problems and relationships among cultivars. Wide phenotypic and molecular diversity found in fig germplasm indicates a considerable potential for improving this crop.
Highlights
IntroductionIn Palestine, locally adapted fig landraces and their wild forms, can be found growing all over the country with high level of phenotypic diversity in fruit color, size, shape, and flavor [3]
Fig (Ficus carica L., Moraceae), one of the most ancient cultivated fruit trees in the Mediterranean region which is the most important fig growing center worldwide, has recently drawn much attention because of its medicinal and nutritional values [1] [2].In Palestine, locally adapted fig landraces and their wild forms, can be found growing all over the country with high level of phenotypic diversity in fruit color, size, shape, and flavor [3]
Genetic Polymorphism and Random Amplified Polymorphic DNA (RAPD) Patterns Twenty five primers were investigated for their potential to evaluate 24 fig genotypes (Table 2)
Summary
In Palestine, locally adapted fig landraces and their wild forms, can be found growing all over the country with high level of phenotypic diversity in fruit color, size, shape, and flavor [3]. The fig germplasm consists of numerous landraces mainly selected by farmers for their fruit qualities and maintained in orchards. They are widely spread through different eco-geographical areas of the country and are threatened by genetic erosion due to biotic and abiotic stresses. The most famous local names are Khdari, Hmadi, Biadi, Khurtmani, Inaqi, Swadi, Mwazi, and Kharoubi. The discrimination between these landraces is, important for purposes of crop improvement and plant genetic resources conservation [5]
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