Correlation and principal components analysis of morphological traits of Micropterus salmoides family at early age
Correlation and principal components analysis were made with seven attributes, including total length ( TV) , body length (BL) , head length (HL) , caudal peduncle length ( CPL) , body depth (BD) and caudal peduncle depth (CPD), according to growth data of seventeen families of Micropterus salmoides at different month-age. Results showed that the high positive phenotypic correlations were observed among six morphological traits, with the value between 0. 565 and 0. 990. Contribution rate of total length for morphological traits was 92.29% at four-month-age and 86.40% at six-month-age, which revealed that the total length could become the selective indicator of morphological traits for the largemouth bass. The contribution rate of TL/BD and CPL/CPD for body shape of largemouth bass at four-month-age was 65. 94% and 34. 06% , respectively, whereas the contribute rate of TL/BD and CPL/CPD at six-month-age was 669.08% and 30. 92% , respectively. Results showed that TL/BD and CPL/CPD could both become the selective indicator for body shape of the largemouth bass. In addition, the results form variance analysis for TL, absolute growth ratio, growth index and body shape index showed that the growth of the family S07D07 performed better than others.
NETL
NSTL
万方数据
维普
