Somatic and meiotic chromosomes of the freshwater prawn, Macrobrachium rosenbergii (de Man) used in aquaculture


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Authors

  • M Das Central Institute of Fisheries Education, Mumbai - 400 061, India
  • W S Lakra Central Institute of Fisheries Education, Mumbai - 400 061, India

Abstract

Cytogenetical studies were conducted in the Indian population of giant freshwater prawn, Macrobrachium rosenbergii for the first time. The chromosome spreads were obtained from the tissues of hepatopancreas, gill, antennal gland and regenerated blastema. A cytological analysis of these tissues revealed a modal diploid chromosome number of 2n = 118 in both male and female individuals. This was confirmed by the modal haploid chromosome number of n = 59 for the testes. A second peak of diploid chromosome number of 2n = 110 was also recorded in M. rosenbergii. The karyotype comprised 29 metacentric, 5 submetacentric, 3 subtelocentric and 22 acrocentric pairs in males and 37 metacentric, 6 submetacentric, 1 subtelocentric and 15 acrocentric pairs in females. The fundamental arm number in male and female was found to be 186 and 204 respectively. Sex chromosomes were cytologically indistinguishable

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Author Biographies

  • M Das, Central Institute of Fisheries Education, Mumbai - 400 061, India
    Central Institute of Fisheries Education, Mumbai - 400 061, India
  • W S Lakra, Central Institute of Fisheries Education, Mumbai - 400 061, India
    Central Institute of Fisheries Education, Mumbai - 400 061, India

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Submitted

2011-08-10

Published

2017-03-31

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How to Cite

Das, M., & Lakra, W. S. (2017). Somatic and meiotic chromosomes of the freshwater prawn, Macrobrachium rosenbergii (de Man) used in aquaculture. Indian Journal of Fisheries, 45(3), 339-343. https://epubs.icar.org.in/index.php/IJF/article/view/8722