Studies on Variations Between Wild and Culture Population of Indian Major Carp Catla catla using Molecular Markers

Author: Anil Jindal

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Abstract

Genetic variations were studied in the three populations of most cultured Indian major carp, Catla catla liver tissue using Random Amplified Polymorphic DNA (RAPD) assay. Decamer primer, OPA-04 produced bands in the range of 0.9 - 2.5 Kb as is evident by the number and intensity of staining of bands. This study indicated that the genetic variations among the individuals of cultured population is very less as compared to wild and distant populations because of inbreeding depression. Hence, the chances of survival of wild and distant populations are more due to out-crossing within the gene pool to improve genome of carp fishes.

Keywords

Polymorphisms, DNA Profile, Inbreeding, Heterogeneity, Survival value

Conclusion

The presently obtained results confirm these assertions. Relatively higher levels of intraspecific genetic variation exhibited in C. catla might be due to comparatively lower rate of propagation. Because of its somewhat reduced rate of propagation, C. catla showed substantially larger levels of intraspecific genetic diversity. During the present investigations, we observed relatively higher levels of intra-specific genetic variation in catla (87.5 % polymorphism). This might be due to comparatively lower rate of propagation in catla. We found comparatively greater levels of intra-specific genetic variation in catla (87.5%) during the current investigations. This could be because catla has a relatively slower rate of propagation. The results of the current study found that the gene pool of farmed variants is only a fraction of the gene pool of the wild forms of the Indian major carp, C. catla. The genetic heterogeneity among cultured populations of various carp species is lower than that within wild forms. As a result, frequent outcrossing of cultivated populations with wild populations has a better chance of producing sturdier, highly nutritious, and more productive varieties of this carp species than selective breeding followed by inbreeding among cultivated populations. But, because of overexploitation, pollution, and inbreeding depression; the wild population of Catla, is also decreasing in Indian rivers. Hence, when fish populations are on the verge of extinction, artificial breeding programs should be used to improve wild populations in fisheries management. These tactics may have increased stock sizes while retaining genetic variety and also, reducing the risk of local extinction.

References

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How to cite this article

Anil Jindal (2023). Studies on Variations Between Wild and Culture Population of Indian Major Carp Catla catla using Molecular Markers. Biological Forum – An International Journal, 15(4): 1052-1056