（1Institute of Vegetables and Flowers， Chinese Academy of Agricultural Sciences， Beijing 100081， China； 2Research
Center of Hami Melon， Xinjing Academy of Agricultural Sciences，Wulumuqi 830091， Xinjiang， China）
Abstract：Abstract：Six generations of P 1，P2，F1，BC1，BC2 and F2 derived from a crossing between parent
‘60’（acidless） and‘61’（acid） were used to study the hereditary effects of melon fruit in citric
content，titratable acidity（ TA） and pH value by the mixed major gene plus polygene inheritance model
with joint analysis method of multiple generations．The results showed that the genetic model of citric
content was“ one pair of additive-dominant major gene plus additive-dominant-epistasis polygene”．
Heritability of the major gene and polygene in F2 population was 31.06% and 30.48%，respectively．
Genetic model of TA was“ two pairs of additive-dominant-epistasis major gene plus additive-dominantepistasis
polygene”．Major gene heritability of TA in F2 population was 78.06% ，while that of polygene
was 0．The genetic model of pH value was also “one pair of additive-dominant major gene plus additivedominant-
epitasis polygene”，and the major gene heritability in F2 was 84.07%，while that of polygene
was 12.09%．
