Vol. 11, Issue 4 (2022)

Author(s):
Dr. Praveen Kumar Singh, Akanksha Bisht and Dr. VB Singh

Abstract:
The investigation were carried out in two years with aims to determine gene action involving 9 parental lines viz., NDSG-1, NDSG-20, NDSG-22, NDSG-24, NDSG-26, NDSG-28, NDSG-30, NDSG-32 and Pusa Chikni of sponge gourd and their 36 F₁ hybrids at MES, Vegetable Science, N.D.U.A.&T., Kumarganj, Faizabad (U.P.) during crop seasons of summer (Zaid) 2014 and 2015. The experiments were laid out in RBD with three replications having each experimental unit of single row with spacing of 3m x 0.5m. High genetic advance observed for node number to first staminate flower anthesis, node number to first pistillate flower anthesis, vine length at last harvest, number of primary branches/per vine at last harvest, number of fruits per plant and marketable fruits yield/plant, which suggested additive gene action for improvement of these characters selection may be effective. The remaining characters showed low to moderate genetic advance which suggested non-additive gene action. The proportion of genes in the parents were less than 0.25 for all the traits accept days to first pistillate flower anthesis, days to first fruit harvest and number of nodes/vine at last harvest in Y₁ indicating asymmetrical distribution of alleles at loci showing dominance in the both years.