Quần thể ban đầu cho chọn giống rô phi đỏ tại Đồng bằng Sông Cửu Long

Grow-out  performance  of  the  diallel  crosses  were  similar  between  two  environments. The cross FE_FE and FD_MM grown best in both environments: for FE_FE, harvest weight was 349.7 ± 8.8 in freshwater and 228.6 ± 4.8 in brackish water; for FD_MM, harvest weight was 328.2 ± 5.4 (freshwarter) and 117.0 ± 3.5 (brackish water). The cross FE_MM had highest harvest weight in freshwater (350.9) but was only number four in brackish water. Similarly, the  cross  FM_ME  grown  best  in  barackish  water,  but  was  number  four  in  freshwater.  In general,  the  Ecuador  strain  grown  best  in  both  environments.  In  addition,  DNA  analysis revealed genetic diversity of the Ecuador strain. The  first  breeding  program  for  red  tilapia,  conducted  by  the  Research  Institute  for Aquaculture No.2, has obtained positive results. The base population (G0), consisted of 1,500 fish, was established using 1,006 fish of the F2-Ecuador (h2 = 0.25 ± 0.09), and 494 fish from 16  diallel  crosses  (F1-Ecuador,  Malaysian,  Taiwanese,  and  Thai  strains).  At  the  moment, growth performance of 202 families of G1 generation are being analysed. The Israeli strain will soon be introduced into G2 to further increase genetic variation of the RIA2 red tilapia population.