Abstract: The objective of this Experiment was to investigate the inheritance of subgynoecious trait in watermekn.Five F₁ combinations, one F₂ segregation population, one backcross population(BC₁R34)and one transferred subgyrxeciousline( BC₄S₃) were developed by crossing, selfing and backcross betwe subgynoecious line( BG1) and other watermelon inbred lines,respectively. All the plants of F₁populations expressed monoecious, similar to their male parents; F₂ populationsegregated into two phenotypes normal monoecious type and subgynoecious type in ratio of 1: 3 throughx²test;as wellthe plants of backcross population BC₁R34 complet dyexpressed morx>ecious. In addition, trarrferxed sudgynoecious lineBC₄S₃was suhgynoecimr type that proprced high female flower,proportion to 77.9%.These results irxlicated that sugnoecious in watermelon was controlled by a single recessive gene. According to the frequen listridution of female,proportion in F₂, it was considered that there might be other genes modifief this subgyrxecious trait. Two pairs ofNILs, BG1 versus BG2, and BC₄S₃ versus R34 was studied lry the RAPD technique out of 333 random primers. A specificamplified fragment s1454_ 1100 in subgynoecious line was found out through verifing the F₂individuals.

Key words: Watermelon, Subgynoecious line, Inheritance analysis, RAPD

CLC Number: 

• S651