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Abstract Detail

Genetics Section

Sheidaei, Masoud [1], Noormohammadi, Zahra [2].

Genetic, cytogenetic and morphological diversity in olive of Iran.

The olive tree (O. europaea subsp. europaeavar. europaea) is one of the most ancient fruit tree species cultivated in the Mediterranean area, with great economic value to mankind. It has both cultivated and wild forms which grow in different parts of Iran. Understanding genetic structure of natural plant populations and knowledge about amount of genetic exchange in them is of great value in population genetic studies,speciation process and even breeding programs. More than 50 cultivated olives(10 plants from each) and Thirty-eight wild (Olea cuspidata var.cuspidata) and cultivated olive trees were collected from different geographical localities in different provinces of Iran and analyzed by SSR molecular markers, cytological features (including polyploidy level, chromosome pairing,B-chromosoes and chromosomes segregation) as well as morphological characteristics. Different clustering and ordination methods grouped cultivated gentotypes and separated them from wild olive trees. PCoA and MDS plots could not discriminate olive populations and showed population's admixture. However,a potential hybrid population was identified which was supported by intermediate growth forms of the plants and other morphological characters. STRUCTURE and Reticulation analysis showed extensive gene exchange between populations. However, allelic combinations specific forsome geographical provinces were determined by STRUCTURE analysis and geneticloci discriminating populations or provinces were identified by DCA. Microsattelite analysis showed diploid nature of these trees, supported by cytological and genome size determination. Canonical correspondence analysis (CCA) reveled interaction between ecological and genetic structure of populations. Mantel test showed relationship between geographical distance and molecular distance of the populations. It seems that the effects of different environmental condition on wild olive genome, has resulted in sequence/allelic differentiation among geographical regions as different provinces showed occurrence of specific alleles in olive trees collected.

Broader Impacts:

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1 - shahid beheshti university,tehran,iran, biology, evin, tehran, tehran, tehran, _________, Iran
2 - islamic azad university, genetics , poonak, tehran , tehran, tehran, _________, Iran


Presentation Type: Poster:Posters for Sections
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PGN001
Abstract ID:38
Candidate for Awards:None

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