تعيين بصمة DNA لأسماك البلطي (عائلة Cichlidae)‎ باستخدام تقنية RAPD-PCR في مقطع نهر الفرات في محافظة المثنى

Abstract EN

The DNA fingerprint of five population of tilapia species belonging to three species of tilapia Oreochromis.niloticus, Oreochromis.aureus and Tilapia.zilli were collected from 90.

(10 from each of the three species) samples of the Euphrates River passage in Muthanna Governorat e and the Shatt al-Arab River in Basra Governorate, southern Iraq.

Using samples from each population were examined by RAPD-PCR technique using seven primer (OPA08, OPA10, OPA13, OPA17, .

OPA19, OPB09, OPC02) The results of this experiment revealed that the 7 primers produced a total of 106 easily scorable RAPD bands ranged in molecular size from approximately 46 to 2844 bp.

DNA fingerprints of fish populations reach genetic relationships between them by drawing Dendrogram.

Dendrogram is characterized by a high genetic similarity between two different population taken from two different T.zill environments, with a 0.76 ratio.

Genetically similarity between two different population taken from two different environments of type O.aureus (0.50), while the results showed a high genetic similarity between O.niloticus , T.zilli.

The genetic similarity between O.niloticus and O.aureus of the same family was 17.4 and there was little genetic similarity between O.aureus and T.zilli.

The randomized RAPD-PCR method was able to differentiate between the five populations and reached the DNA signature of the species Three under environmental conditions in southern Iraq in this study had provided a baseline for future genetic improvement and monitoring of the gene pools of tilapia stocks.