Preliminary Studies On Nutritional Quality And Genetic Characteristics Among Populations Of M. Rosenbergii

The investigation of morphologic diversity, nutritional quality , population genetic characteristics and quality of larvae among three populations of Macrobrachium rosenbergii were conducted by using the integrative methods, including the multivariation analyses,PCR and sequencing technique and biochemical composition analysis of the shrimp muscles. The populations are artificial cultured population (A), population of Burma (B) and population of the hybridized between Burma and artificial cultured populaiton(B-+). The results have showed that the morphologic and nutritional quality diversity, genetic characteristics variation and quality of larvae among the three populations.1. Studies on difference in morphology & discrimination among three populations of M.rosenbergiiBased on 12 morphological proportional characters of Macrobrachium rosenbergii, three multivariation analysis methods (cluster analysis, prinpical component analysis and discriminant analysis) were adopted to comparably investigate the morphological variation among eight populations (1 cultivated, 1 wild and 6 hybridized populations). The results of cluster analysis and principal component analysis indicated that the morphological characters were similar among the six hybridized populations. But quite different from that of cultivated and Burma introduced population. In the principal component analysis of the female populations, five principal components were constructed, the contributory ratio of the first principal component was 26.191%, the second, the third, the fourth and the fifth was 16.036%, 13.309%, 10.796%, and 10.166% respectively, the cumulative contributory ratio was 76.471%. Accordingly, for the male populations, five principal components were also constructed, their contributory ratios were 25.206%, 20.277%, 16.985%, 13.222% and 8.945% respectively , the cumulative contributory ratio was 84.634%. The result of discriminant analysis revealed that there were significant differences among most of the eight populations (P<0.01). The identification accuracy of female was 60.03 %-100.00%(Pl) and 33.30%-100%(P2), the total discriminant accuracy...