In order to find out the correlation among the quantitative characters and influencing factors of production of equilateral shallow clams,high phenotypic traits shell length( X1),shell( X2),shell width( X3),before the apex of shell to shell( X4),apex of shell to shell after long( X5),ligament( X6),live weight( Y1),soft weight weight traits( Y2),shell weight( Y3) of 130 randomly selected 12 months Zhejiang Daishan wild equilateral shallow clam were measured. The genetic correlation,multiple regression and pa...