Chọn giống tôm càng xanh (Macrobrachium rosenbergii) theo tính trạng sinh trưởng bằng phương pháp chọn lọc gia đình

The  giant  freshwater  prawn  (Macrobrachium  rosenbergii)  or  GFP  is  one  of  the  most important freshwater crustacean species in the inland aquaculture sector of many tropical and subtropical countries. In Vietnam, GFP is cultured in a variety of culture systems, typically in integrated or rotational rice-prawn culture (Phuong et al., 2006) and has become one of the 

most common farmed aquatic species in the country, due to its ability to grow rapidly and to attract high market price and high demand. This study reports results on the breeding program for  fast  growth  employing  combined  (between  and  within)  family  selection  in  giant freshwater prawn in Vietnam. The base population was synthesized using a complete diallel cross including 9 crosses from two local stocks (DN and MK strains) and a third exotic stock (Malaysian  strain  -  MY).  In  the  next  three  selection  generations,  matings  were  conducted between genetically unrelated brood stock to produce full-sib and (paternal) half-sib families. Results show that body trait heritabilities were moderate; genetic correlations between body and carcass weight traits were high. Average selection response (% per generation) for body weight estimated  as  the  difference  between  the  Selection and  the  Control  group was  7.4% calculated from least squares means (LSMs), 7.0% from estimated breeding values (EBVs) and 4.4% calculated from EBVs between two consecutive generations.