Genetic changes, intra- and inter-specific introgression in farmed Nile tilapia (Oreochromis niloticus) in Thailand

Sukmanomon, Srijanya, Kamonrat, Wongpathom, Poompuang, Supawadee, Nguyen, Thuy T. T., Bartley, Devin M., May, Bernie and Na-Nakorn, Uthairat 2012, Genetic changes, intra- and inter-specific introgression in farmed Nile tilapia (Oreochromis niloticus) in Thailand, Aquaculture, vol. 324-325, pp. 44-54.

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Title Genetic changes, intra- and inter-specific introgression in farmed Nile tilapia (Oreochromis niloticus) in Thailand
Author(s) Sukmanomon, Srijanya
Kamonrat, Wongpathom
Poompuang, Supawadee
Nguyen, Thuy T. T.
Bartley, Devin M.
May, Bernie
Na-Nakorn, Uthairat
Journal name Aquaculture
Volume number 324-325
Start page 44
End page 54
Total pages 11
Publisher Elsevier BV
Place of publication Amsterdam, The Netherlands
Publication date 2012-01-12
ISSN 0044-8486
1873-5622
Keyword(s) chitralada
genetic change
GIFT
introgression
nile tilapia
oreochromis niloticus
Summary Fourteen microsatellite loci were used to examine genetic changes of four strains in Nile tilapia (Oreochromis niloticus) derived from genetically improved farmed tilapia (GIFT) and two strains derived from a local Chitralada strain of Nile tilapia in Thailand. Reference populations, including the ninth generation of GIFT strain, the original Chitralada strain, two conspecific reference populations from Ivory Coast and Uganda, and one population each of Oreochromis mossambicus and Oreochromis aureus, were also examined. Despite minor genetic changes, three of the four GIFT-derived populations retained their purity as GIFT while genetic variation did not decline. One of the GIFT-derived populations showed high levels of introgression from the Chitralada strain. Likewise, introgression from GIFT to the Chitralada-derived populations was seen. Inter-specific introgression from O. mossambicus was observed in the GIFT reference population and one of the Chitralada-derived strains. Introgression from O. aureus was detected in one of the GIFT-derived populations with a history of intensive inter-strain crossing. However, the introgression resulted in elevated genetic variation relative to the Chitralada original strains.
Language eng
Field of Research 060411 Population, Ecological and Evolutionary Genetics
Socio Economic Objective 830102 Aquaculture Fin Fish (excl. Tuna)
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2011, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30044376

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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