Journal of Advances in Biology & Biotechnology

The experiment was conducted on a vegetable research farm, BAU (Bihar Agricultural University), sabour, Bhagalpur, on nine traits, viz., days to first male and female flower opening and harvest, number of nodes to first male and female flower appearance, vine length, inter-nodal length, number of primary branches, and peduncle length. 30 F₁ hybrid were developed by six parents using a 6 x 6 full diallel mating design, namely, Narendra Joyti (NJ), BRBG-23 (BG-23), BRBG-65 (BG-65), Pusa Naveen (PN), BRBG-21-2 (BG-21-2) and Round Bottle Gourd (RBG). Three trials were conducted in February, May, and September 2022, with Randomized Block Design (RBD) design. Among parents RBG exhibited took minimum days in earliness traits and NJ x PN and PN x NJ for male flower, PN x NJ for female flower and first harvest, BG-65 x BG-21-2 for nodes to first male and NJ x BG-23 for female flower appearance took minimum node, while BG-21-2 and PN x BG-65 had maximum vine length, BG-65 and BG-65 x PN had maximum inter-nodal length whereas RBG and RBG x NJ had maximum peduncle length and NJ and NJ x PN had maximum number of primary branches over check in all three environments and pooled.