KARYOTYPE OF THE GIANT FRESHWATER PRAWN, MACROBRACHIUM ROSENBERGII

PRANEET DAMRONGPHOL,^a NITTAYA EANGCHUAN,^a SUPAPORN AJPRU,^b BOONSERM POOLSANGUAN^a AND BOONSIRM WITHYACHUMNARNKUL^b

ABSTRACT: Number and chamcteristics of chromosomes of the giant Freshwater pmWl1, Macrobrachium rosenbergii, were studied from the second meiotic metaphase of the fertilized egg (n = 59), from mitotic metaphase of the actively dividing embryonic cell and from spermatogonial metaphase of the testicular tissue (2n = 118). The karyotype consistes of 61arg; 26 medium, 15 small and 12 very small pairs. Most of these chromosomes are submetacentric and metacentric. Only 6 pairs appear to be either telocentric or acrocentric in configuration.

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a Department of Microbiology b Medidnal Plants Information Center
c Department of Food Chemistry, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand.
d Institute for Pharmaceutical Biology, Munich University, Germany.

Received 27 February 1991

KARYOTYPE OF THE GIANT FRESHWATER PRAWN, MACROBRACHIUM ROSENBERGII

PRANEET DAMRONGPHOL,a NITTAYA EANGCHUAN,a SUPAPORN AJPRU,b BOONSERM POOLSANGUANa AND BOONSIRM WITHYACHUMNARNKULb

PRANEET DAMRONGPHOL,^a NITTAYA EANGCHUAN,^a SUPAPORN AJPRU,^b BOONSERM POOLSANGUAN^a AND BOONSIRM WITHYACHUMNARNKUL^b