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Comparative Karyological Findings in Native and Crossbred Pigs

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Proceedings of the National Academy of Sciences, India Section B: Biological Sciences Aims and scope Submit manuscript

Abstract

A cytogenetic study was conducted in native (60) and crossbred (60) pigs in an effort to study their chromosomal profile by employing the short term peripheral blood lymphocyte culture technique. The modal chromosome number (2n) in both native and crossbred pigs was found to be 38 and a fundamental number of 64 as in the exotic. Among autosomes, first five pairs were sub metacentric, next two pairs were sub telocentric (6–7), subsequent five pairs were metacentric (8–12) and remaining six pairs were telocentric (13–18). Among allosomes, both X and Y chromosome were metacentric. First chromosome was the longest pair, thirteenth pair was the second largest and Y chromosome was smallest metacentric among all the members of the karyotype. The statistical analysis based on the arcsine transformed data of native and crossbred pigs revealed that genetic group had a significant effect on the mean relative length of chromosomes 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 17 and allosomes. Genetic group had significant effect on mean arm ratio of first 12 pairs of autosomes (except 7th chromosome), X and Y-chromosome. Significant differences were observed in mean centromeric indices of autosomes (2 and 9) and allosomes between two genetic groups. Mean morphological indices of all the autosomes were significantly influenced by the genetic group. Sex had no significant effect on morphometric measurements of all the chromosomes in both genetic groups.

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Acknowledgments

The authors wish to acknowledge the Sri Venkateswara Veterinary University for the financial assistance provided in the form of RKVY project. The authors agree that there is no conflict of interest regarding the submission and publication of the manuscript.

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Authors and Affiliations

  1. Department of Animal Genetics and Breeding, College of Veterinary Science, Proddatur, Andhra Pradesh, India

    P. Guruvishnu

  2. Department of Animal Genetics and Breeding, College of Veterinary Science, Tirupati, Andhra Pradesh, 517502, India

    B. Punyakumari

  3. Livestock Research Station (LRS), Palamaner, Chittoor, Andhra Pradesh, India

    B. Ekambaram

  4. Department of Animal Genetics and Breeding, College of Veterinary Science, Hyderabad, Andhra Pradesh, 500030, India

    Gnana Prakash Manthani

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  1. P. Guruvishnu
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  2. B. Punyakumari
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  3. B. Ekambaram
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  4. Gnana Prakash Manthani
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Correspondence to P. Guruvishnu.

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Guruvishnu, P., Punyakumari, B., Ekambaram, B. et al. Comparative Karyological Findings in Native and Crossbred Pigs. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 87, 545–550 (2017). https://doi.org/10.1007/s40011-015-0622-x

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  • DOI: https://doi.org/10.1007/s40011-015-0622-x

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