Growth Evaluation of Selfcrossed Progenies BC1F2 Experiencing Submerged and Non-submerged at BC1F1 and its Parents

Abstract

A non-tidal swamp is an option to increase the rice harvested land and production, however, its utilization still depends on the natural condition so the plants are vulnerable to submergence and drought stress. Developing dual-tolerant varieties is the right choice for developing rice cultivation in non-tidal swamps. Inpara 8 has the SUB1 gene which is tolerant to submergence stress and Inpago 5 is tolerant to drought stress. The study aimed to evaluate the growth of BC1F2 from Inpara 8 and Inpago 5 that experienced submerged stress and its parents (Inpago 5 and Inpara 8). The research was carried out at the greenhouse of Agriculture Faculty, Sriwijaya University on July 2021 – January 2022. Inpago 5 has the highest average plant height ( 145.81 cm ), the highest number of tillers (4.73), the most productive tillers (3.87), and the highest total grain in the clump (720.87 grains), the weight of the clump grain (15.86 g) and the lowest percent of empty grain (33.47 %). The donor parent Inpara 8 had the highest average total grain per panicle (192.08), and the highest dry weight (20.69 g). BC1F2 Submerged had the highest average 1000 grain weight (25.26 g) and the fastest harvest age (114.50 DAP). The BC1F2 selfcross progeny which had experienced submergence stress and was not in the BC1F1 phase had almost the same characteristics as its two parents as indicated by the results of the observed parameters which generally did not show any significant differences.