Farahnaz Molavi; Jamshid Darvish; Farhang Haddad; Maryam M. Matin
Abstract
Cytotaxonomy is a branch of cytogenetics, devoted to the comparative study of karyological features for systematic and evolutionary purposes. Surely, awareness of chromosomal characters increases our knowledge in different fields of studies. In this study, cytogenetic analyses were performed in 92 Mus ...
Read More
Cytotaxonomy is a branch of cytogenetics, devoted to the comparative study of karyological features for systematic and evolutionary purposes. Surely, awareness of chromosomal characters increases our knowledge in different fields of studies. In this study, cytogenetic analyses were performed in 92 Mus musculus specimens from 26 localities in Iran. Cytogenetic characteristics of the house mouse, Mus musculus, in Iran show that the chromosome number is 2n=40 and the arm number is NF=40. The karyotyping results indicated the presence of 20 Acrocentric (A) chromosome pairs. The L/S (r ratio) was between 2.0621 and 4.5862. The length of shortest chromosome, length of longest chromosome and mean of chromosomal length in different populations were between 2-3.58, 6.07-7.01 and 3.43-5.05 (μm), respectively. The results showed two distinct karyotypic formulae, namely cytotype B and cytotype C. Asymmetry indexes (AI, DI, As%, A, A2, A1 and Syi%) in all population except Birjand and Khash showed symmetry in chromosomes. In clustering methods using the matrix of symmetrical indexes similarities, four clusters were revealed, one for specimens of central and east of Iran, the second cluster for specimens from south and west of Iran, the third cluster was related to the eight specimens of Birjand and finally, the fourth cluster for two specimens of Khash locality
Faranaz Molavi; Haji GholiKami; Morteza Yazdanpanahi
Abstract
The diploid number among Gekkonid lizards ranges from 2n=16 to 2n=46. The majority of geckos' chromosomes are small which makes the study of their chromosomes very difficult. For this reason, karyotype of Cyrtopodion caspium and some similar gecko are still not known. The close relatives of C. caspium ...
Read More
The diploid number among Gekkonid lizards ranges from 2n=16 to 2n=46. The majority of geckos' chromosomes are small which makes the study of their chromosomes very difficult. For this reason, karyotype of Cyrtopodion caspium and some similar gecko are still not known. The close relatives of C. caspium have variation in the chromosomal number in their populations. So to find out possible variability among these populations in Iran. We described the karyotype of testis and bone marrow of 14 specimens of this species from seven provinces and 10 localities in north and north-eastern parts of Iran in 2011. They showed 2n=38 for all populations. There is not intraspecific chromosome polymorphism in Cyrtopodion caspium. The karyotype consists of one pair of metacentric element and 17 pairs of telocentric or subtelocentric elements and one pair of three arm chromosomes. The number of haploid chromosomes was 21 for three male specimens. The chromatid separation did not show heteromorphic sex chromosomes. Our results highlight the need for continued research into the basic biology and taxonomy of Cyrtopodion caspium in Iran.
