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ผู้เขียน หัวข้อ: Vietnam; Freshwater Prawn Crosses  (อ่าน 2246 ครั้ง)
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« เมื่อ: มกราคม 17, 2009, 01:19:27 PM »

Vietnam; Freshwater Prawn Crosses

 
Abstract: The aim of this study was to evaluate the growth of three strains of freshwater prawns (Macrobrachium rosenbergii) that originated from geographically separated locations.  Crosses were established over two generations using two wild Vietnamese river populations (Dong Nai and Mekong) that were domesticated for the study and an introduced Hawaiian strain that has been in culture for many generations.  Juveniles from nine strain combinations were produced using single-pair matings.  Results after 15 weeks of growout in hapas showed that growth performance of the Hawaiian strain was best among the purebred strains and that certain cross combinations grew significantly faster than purebred strains.  Mean body weights of specific cross combinations with Dong Nai or Mekong as dams and the Hawaiian strain as sires were significantly heavier than those of purebred Dong Nai or Mekong strains.  While males reached heavier mean weights than females, male variation among the strains was obscured by social factors that produced different frequencies of male morphotypes (blue claw, orange claw and small males).  Results suggest presence of potentially valuable heterosis (hybrid vigor).
 
Source: Aquaculture.  Evaluation of growth performance in a diallel cross of three strains of giant freshwater prawn (Macrobrachium rosenbergii) in Vietnam.  Nguyen Minh Thanh (s4090612@student.uq.edu.au, Centre for Marine Studies, University of Queensland, Brisbane, QLD 4072, Australia), Raul W. Ponzonib, Nguyen Hong Nguyenb, Nguyen Thanh Vuc, Andrew Barnesa and Peter B. Matherd.  Volume 287, Issues1-2, Pages 75-83, February 1, 2009.
 
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