Abstract
The karyotype and chromosomal characteristics of (anjak, hamoon mahi, shir mahi) Schizothorax zarudnyi (Nikolskii, 1897), in Hamoon Lake of Iran were investigated. The examination of 85 metaphases spread prepared from 20 fingerling specimens indicated that the chromosome numbers of this species was found 2n=96 and the arm number was determined as NF=142. The prepared karyotype of this species was consisted of 9 pairs of metacentric (m), 14 pairs submetacentric (sm) and 25 pairs subtelocentric (st) chromosomes. The chromosome formula can be stated as 2n = 9m + 14sm + 25st. Karyological parameters shown that centromeric index, arm ratio, relative length and so length variation range of chromosomes of this fish are between 25.00 - 49.24, 1.03 - 3.55, 0.88 - 4.13 and 14.57 - 67.70 respectively and total length of chromosome is 1639.16 µm. The largest chromosome in this species is a pair of the submetacentric chromosome. The sex chromosomes were cytologically indistinguishable. With respect to the number of S. zarudnyi chromosomes and resistant of this fish to the environmental conditions, it seems to be tetraploid origin fish. This study may provide the first knowledge on chromosome analysis in S. zarudnyi and add basic information useful for its chromosomal manipulations.
Abstract
The karyotype and chromosomal characteristics of (anjak, hamoon mahi, shir mahi) Schizothorax zarudnyi (Nikolskii, 1897), in Hamoon Lake of Iran were investigated. The examination of 85 metaphases spread prepared from 20 fingerling specimens indicated that the chromosome numbers of this species was found 2n=96 and the arm number was determined as NF=142. The prepared karyotype of this species was consisted of 9 pairs of metacentric (m), 14 pairs submetacentric (sm) and 25 pairs subtelocentric (st) chromosomes. The chromosome formula can be stated as 2n = 9m + 14sm + 25st. Karyological parameters shown that centromeric index, arm ratio, relative length and so length variation range of chromosomes of this fish are between 25.00 - 49.24, 1.03 - 3.55, 0.88 - 4.13 and 14.57 - 67.70 respectively and total length of chromosome is 1639.16 µm. The largest chromosome in this species is a pair of the submetacentric chromosome. The sex chromosomes were cytologically indistinguishable. With respect to the number of S. zarudnyi chromosomes and resistant of this fish to the environmental conditions, it seems to be tetraploid origin fish. This study may provide the first knowledge on chromosome analysis in S. zarudnyi and add basic information useful for its chromosomal manipulations.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | April 1, 2008 |
| Published in Issue | Year 2008 Volume: 8 Issue: 2 |