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dc.creatorSimonsen, V.
dc.creatorHansen, M.M.
dc.creatorSarder, M.R.I.
dc.creatorAlam, M.S.
dc.date.accessioned2018-12-06T14:19:54Z
dc.date.available2018-12-06T14:19:54Z
dc.date.issued2004
dc.identifierarticle-13.pdf
dc.identifier.citationNaga 27(1-2): 65-69
dc.identifier.urihttps://hdl.handle.net/20.500.12348/2056
dc.description.abstractThirty individuals of each species of Indian major carps, i.e., Catla catla, Cirrhinus cirrhosus (C. mrigala) and Labeo rohita, obtained from a nursery near Mymensingh, Bangladesh were analysed by means of allozyme electrophoresis. Twenty-one loci were studied. Several loci revealed significant deviation from Hardy-Weinberg expectations caused by deficiency of heterozygotes, indicating Wahlund effects due to problems with species identification. Moreover, bimodal distributions of individual heterozygosity within the three putative species indicated hybridisation. This was confirmed using analysis of individual admixture proportions, as individuals misidentified to species and hybrids between species were observed. Furthermore, factorial correspondence analysis to visualize genetic relationships among individuals revealed three distinct groups containing misclassified individuals, along with some intermediate individuals interpreted as hybrids. Ten per cent of all C. catla and L. rohita had been erroneously identified to species, and 40 per cent of all presumptive C. catla were hybrids between C. catla x C. cirrhosus and C. catla x L. rohita. In the case of C. cirrhosus, 37 per cent of the samples were C. cirrhosus x L. rohita hybrids. Thirty per cent of all presumptive L. rohita turned out to be hybrids between L. rohita x C. catla and L. rohita x C. cirrhosus. The high incidence of hybrids in C. catla might be responsible for slower growth of the fish in aquaculture.
dc.formatapplication/pdf
dc.languageEn
dc.publisherWorldFish
dc.rightsCC BY 4.0
dc.sourceNAGA
dc.titleHigh level of hybridisation in three species of Indian major carps
dc.typeJournal Article
dcterms.bibliographicCitationSimonsen, V. et al. (2004). High level of hybridisation in three species of Indian major carps. Naga 27(1-2): 65-69
cg.coverage.countryBangladesh
cg.coverage.regionSouth Asia
cg.identifier.worldfish1729
cg.subject.agrovocaquaculture
cg.subject.agrovocfish culture
cg.subject.agrovocfreshwater
cg.subject.agrovocgenetics
cg.subject.worldfishfish farming
cg.subject.worldfishfresh water
cg.contributor.affiliationWorldFish
cg.identifier.statusOpen access
cg.description.themeSustainable aquaculture


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