1 College of Horticulture，South China Agricultural University，Guangzhou 510642，Guangdong，China； 2 College
of Food Science and Engineering，Foshan University，Foshan 528000，Guangdong，China
Taking cultivated inbred line‘ Foli112’ and wild inbred line‘ THMC170’ as parents，this paper
constructed 4 genetic generations（P1，P2，F1，and F2）．Major gene + polygene mixed inheritance model was
used to conduct genetic analysis on the tendril of first node in bitter gourd．Then，taking cultivated inbred line
‘Foli 734’ and semi-wild inbred line ‘AVBG1602’ as parents，this paper constructed another 4 genetic
generations（P1，P2，F1，and F2） and carried out analysis on the inheritance of tendril-branching．The results
showed that the first node occurred in bitter gourd plant tendril was controlled by 2 pairs of equi-dominant
major genes + additive-dominant polygenes genetic model（E-6 model） with the heritability of the major
gene was 15.81% and that of multiple genes was 7.83%．The tendril-branching of bitter gourd was controlled
by one dominant gene．The tendril-branching was dominant and tendril not branching was recessive．These
results have laid foundation for further analyzing genetic mechanism of tendril origin and development in
bitter gourd.
