MORPHO-MERISTIC CHARACTERIZATION AND KARYOMORPHOLOGICAL VARIATIONS IN CHANNA PUNCTATA (BLOCH, 1793) FROM MEIKTILA LAKE, MEIKTILA, MANDALAY REGION
Abstract
- Assessment on the variations of morpho-meristic and cytotaxonomic characteristics due to the variation of karyo-morphology in some Channa punctata from Meiktila Lake, Mandalay Region was conducted during July 2022 to January 2023. Blood samples were treated using 0.50 % colchicine solution and incubated with the saturated NaCl for various durations: 1 hr 15 mins, 1 hr 30 mins, 1 hr 45 mins, 2 hrs, 2 hrs 15 mins, 2 hrs 30 mins, 2 hrs 45 mins, 3 hrs, 3 hrs 15 mins and 3 hrs 30 mins, respectively. A drop of each sample was put onto the slide and stained with undiluted Giemsa stain. The best optimal checkpoint for metaphase chromosomes was at 2 hrs 30 mins and were not clearly discerned on morphometric changes. Model numbers of metaphase chromosomes were octaploidy 2n = 8X = 128 having 3 submetacentric (sm) + 6 acrocentric (ac) + 7 telocentric (t) with fundamental arm number (NF = 304). Thus, C. punctata from Meiktila lake possess the diverged karyotypic patterns indicating that they are asymmetric species and can be used as cytogenetic marker for their population.
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Year
- 2025
Author
-
Myo Myo1 and Win Win Mar2
Subject
- Zoology, Marine Science, Environment of Water Studies
Publisher
- Myanmar Academy of Arts and Science (MAAS)