Genetic Analysis of Some Genotypes and Varieties of Olive in Qom Province Using Morphological and ISSR Markers

Hosseini Gheydari, Fereshteh; Tahernezhad, Zahra

doi:10.22055/ppd.2019.23698.1521

Document Type : Research Paper

Authors

¹ M.Sc. Graduate of Horticulture, Seed and Plant Certification and Registration Institute, Karaj, Iran

² Ph.D Graduate of Biometrical Genetic, Seed and Plant Certification and Registration Institute, Karaj, Iran

https://doi.org/10.22055/ppd.2019.23698.1521

Abstract

Abstract

Background and Objectives
Olive tree (Olea europaea L.) is one of the most ancient tree crops which has been domesticated in the Middle East for about 6000 years. The romans enlarged its cultivation from the Greek islands throughout the Mediterranean basin, mainly along the African and European coasts as well as in the areas where large volumes of water have improved the climate. In the past, cultivar distinguishing approaches were based on morphological characteristics of leaf, fruit and stone. Recently, morphological traits with isozyme and DNA- based markers have been applied to the classification of cultivars. The aim of this study was the evaluation of morphological and molecular similarities between the new and the known cultivars of olive trees in the Fadak garden in Qom province in Iran.

Materials and Methods
In order to analyze genetic variations of olive tree genotypes in Qom province, the olive genotypes (Manzanilla, Sevilana, Mahzam, Arbequina, and Conservalia) and two superior cold resistant genotypes (Fadak and Tooba) were studied using morphological traits based on distinctness, uniformity and stability (DUS) guideline in the Fadak garden (Qom province, Iran) in 2013. In addition, a total genomic DNA was extracted from the leaves, and the PCR was carried out by a set of six inter simple sequence repeats (ISSR) markers for amplification. Then, amplification products from ISSR primer tests were characterized on 2% agarose gels immersed in 1X TBE buffer. The gels were stained with ethidium bromide. The PCR fragments were scored for the presence or absence as 1 and 0, respectively.

Results
In this study, analysis of variance was performed on 12 quantitative traits. Results showed there were significant differences (p < 0.01, p < 0.001) between all the traits and Fadak and Tooba separated from other genotypes by comparing the means of the tests (Duncan multiple range method). According to the biplot graph (the first two components) in the PCA method by quantitative traits, Arbequina, Manzanilla and Tooba were included in one group, and Fadak and Tooba were distinctly separated from other genotypes. Also, according to the biplot graph (the first two components) in the PCA method by qualitative traits, the distance between Fadak and Tooba was low. In the molecular analysis, all ISSR markers (six primers) showed polymorphism. The total band range was 8-21 (with 14.66 as the average) and the PIC varied from 0.231 to 0.447 (0.309 average). Based on the PCA method, Tooba was utterly separated from other genotypes.

Discussion
In this study, Fadak and Tooba were completely different from other varieties using morphological traits and ISSR molecular markers. Fadak was found to be similar to Sevilana and Conservalia. There was a high similarity between Fadak and Tooba. Also, no similarity was observed between the results of morphological and molecular traits.

Keywords

Main Subjects

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© 2019 by the authors. Licensee SCU, Ahvaz, Iran. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-Non Commercial 4.0 International (CC BY-NC 4.0 license) (http://creativecommons.org/licenses/by-nc/4.0/)

Genetic Analysis of Some Genotypes and Varieties of Olive in Qom Province Using Morphological and ISSR Markers

References

References

Volume 42, Issue 3December 2019Pages 373-386

Volume 42, Issue 3
December 2019
Pages 373-386