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International Journal of Botany
  Year: 2005 | Volume: 1 | Issue: 2 | Page No.: 188-195
DOI: 10.3923/ijb.2005.188.195
 
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Genetic Diversity among Mentha Populations in Egypt as Reflected by Isozyme Polymorphism

Abd El-Zaher M.A. Mustafa, Abdelfattah Badr , Mohammed A. El-Galaly , Ahmed A. Mobarak and Mervat G. Hassan

Abstract:
Isozyme polymorphism has been used to measure genetic diversity, genetic population structure and for the estimation of the amount of genetic divergence within and between populations and species of Mentha in Egypt. Ten isozyme systems revealed 31 isozyme loci and a total of 79 alleles in 32 populations of M. longifolia, five populations of M. spicata and one population of M. piperita. The examined populations of M. longifolia and M. spicata showed high levels of genetic variation that might be due to out-breeding and wide dispersal of seeds and pollen grains. Three alleles were scored in all populations; however, no diagnostic alleles at the species level were detected in the 31 isozyme loci. This suggests that the three species may be of hybrid origin or have recently been derived from an ancestor harboring high levels of genetic diversity. The tree illustrating genetic distance among the examined accessions of Mentha indicated obvious discrimination of the three species and the isolation of their populations from each other. At the infra-specific level, the geographically proximal populations exhibited higher genetic similarity than those that geographically distant, indicating environmental impact on the genetic diversity in the genus Mentha in Egypt.
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How to cite this article:

Abd El-Zaher M.A. Mustafa, Abdelfattah Badr , Mohammed A. El-Galaly , Ahmed A. Mobarak and Mervat G. Hassan , 2005. Genetic Diversity among Mentha Populations in Egypt as Reflected by Isozyme Polymorphism. International Journal of Botany, 1: 188-195.

DOI: 10.3923/ijb.2005.188.195

URL: https://scialert.net/abstract/?doi=ijb.2005.188.195

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