Genetic Model Analysis of Major Gene-Polygene of Seed Weight and Seed Shape in Flax(Linum usitatissimum L.)
The seed characteristics of flax(Linum usitatissimum L.)are the important traits for superior variety selection.F1 and F2 generations crossed with CLX and BLX were used to research the inheritance of five seed characteristics in flax with major gene-polygene mixed inheritance analysis.The results showed:Five seed characteristics were controlled by major gene-polygene inheritance.The inheritance model of the 1000-grain weight was two pairs of additive major gene plus additive-dominance polygene,the heritability of the major gene and polygene were 84.59％and 14.73％,respectively.The inheritance model of seed surface area was controlled by two pairs of additive-dominant major gene plus additive-dominant polygene,seed length and seed width were two pair of additive-epistasis major gene plus additive-dominance polygene,the heritabilities of major genes of three traits were 45.69％,37.09％,and 19.27％,respectively.The inheritance model of seed circumference was two pairs of equal dominant major genes plus additive-dominant polygene,the heritability of major genes was 68.24％.The heredity of seed shape traits is dominated by the major gene effect,and can be selected in early generation in progeny population through hybridization.
万方数据
