Karyotype Analysis of the
Hybrid, Thai Red Tilapia (Oreochromis
niloticus Linn. X Oreochromis
mossambicus Linn.)
Abstract:
Thai Red Tilapia is the hybrid
fish between Oreochromis niloticus Linn.
and O. mossambicus Linn. The
chromosomal constitution of this hybrid were investigated using high quality
metaphase preparations obtained from their bone marrow. The diploid
chromosome of Tilapias consisted of 22 chromosome pairs (2n = 44). However, the morphology of
their chromosome types were different. The karyotype of O. niloticus consisted of 18 subtelocentric (st), 26 acrocentric
(a) whereas 6 submetacentric (sm), 10 st, 28 a and 2 sm 6 st, 36 a were
observed in O. mossambicus and Thai
Red Tilapia respectively. The arm number of O. niloticus, O.
mossambicus and Thai Red Tilapia were 62, 60 and 52 respectively. The
heterochromatic of the short arms of all Tilapias were also observed. The
karyotypic differences between O.
niloticus, O. mossambicus and
the hybrid, Thai Red Tilapia will be useful for strain classification and the
improvement of commercial Tilapias production.
How to cite this article
Jiradej Manosroi, Keravit Petchjul , Umnat Mevatee and Aranya Manosroi , 2003. Karyotype Analysis of the
Hybrid, Thai Red Tilapia (Oreochromis
niloticus Linn. X Oreochromis
mossambicus Linn.). Journal of Biological Sciences, 3: 612-617.
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