ABSTRACT: This work was carried out during the two successive seasons of 2015/2016 and 2016/2017 to assess the molecular systematic and genetic relationship between two Mentha longfolia ecotypes, which collected from South Sinai (St. Catharine) and Siwa Oasis in Egypt through ISSR molecular markers, Then evaluating the productivity of them under different ecological conditions. The experiment was conducted at two different locations in newly reclaimed lands as follows: Baloza (North Sinai Governorate) and Siwa Oasis (Matrouh Governorate). The results of molecular markers showed high similarity values between the studied ecotypes were 92%. ISSR analysis confirmed that the Mentha.........
Key words: Mentha, Molecular Systematic, ISSR, Productivity, essential oil, ecotypes.
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