Submit or Track your Manuscript LOG-IN

Genetic Differentiation and Relationship between Two Karyotype Forms of Nannospalax ehrenbergi (Rodentia: Spalacidae) in Egypt

Genetic Differentiation and Relationship between Two Karyotype Forms of Nannospalax ehrenbergi (Rodentia: Spalacidae) in Egypt

Adel A. Basyouny Shahin,1,* Amira M. Metwally Mohamed2 and Abd El-Reheem A. El Shatter2

 

1Department of Zoology, Faculty of Science, Minia University, 61519 El Minia, Egypt
2Department of Zoology, Faculty of Science, South Valley University, 83523 Qena, Egypt

*      Corresponding author: adel.shahin@mu.edu.eg

 

ABSTRACT

Genetic differentiation between the two karyotype forms I (2n = 60) and II (2n = 62), which have been recently recognized in the Egyptian N. ehrenbergi, was examined at 17 structural genetic loci and interrelationship was discussed. Of these 17 genetic loci, 10 (58.8%) loci were monomorphic with the same allele fixed in all individuals from both karyotype forms and only 7 (41.2%) loci were polymorphic with two different alleles. Levels of genetic variability between the two forms were relatively low and are comparatively either within the range or quite different from those of the same species occurring elsewhere. The means of expected (He) and observed (Ho) heterozygosity were 0.175 ± 0.503 and 0.124 ± 0.496, respectively, the mean percentage of polymorphic loci (P) was 29.42%, while the mean number of alleles per locus (A) was 1.30 ± 0.11. In addition, the mean levels of genetic identity (I) and genetic distance (D) were 0.932 and 0.070, respectively, indicating that the two forms were genetically highly similar. Thus, the present results are concordant with that obtained from the chromosomal, morphological and penial study and support the recent hypothesis of occurrence of new species in N. ehrenbergi. Divergence between the two species would have occurred during Pleistocene (ca 1.26 million years ago).
 

To share on other social networks, click on P-share. What are these?

Pakistan Journal of Zoology

August

Vol. 50, Iss. 4, Pages 1199-1600

Featuring

Click here for more

Subscribe Today

Receive free updates on new articles, opportunities and benefits


Subscribe Unsubscribe