In Indonesia, rice production continues to decline due to various problems. As an effort to meet food needs, the utilization of dry land becomes necessary. However, rainfed rice always has low yields. The study, carried out to evaluate potential lines, has succeeded. This research, conducted in the Jenggolo Village, Kepanjen District, Malang Regency, Indonesia, ran from January to June 2024. The breeding materials consisted of six F7 genotypes and three check varieties, namely, Situ Bagendit, Cibogo, and IR64, sustained evaluation through a randomized complete block design (RCBD) with three replications. The correlation analysis performed sought to determine the relationship between characters as selection criteria. The selection criteria obtained based on Pearson’s correlation included plant length (PH), panicle length (PL), number of fertile grains (FG), total grains per panicle (TP), and weight of grains per plant (GWP). The result of this research identified two F7 genotypes, F7-4-21-11-23-3-2 and F7-4-21-11-23-6-11, as potential rice lines with higher grain yield than the check varieties. Multi-location-based trials and screening of resistance genes need to be carried out to determine the stability and resistance of genotypes to pest and disease attacks.

Keywords: Rice (O. sativa L.), breeding, potential F7 lines, yield assessment, genetic parameters

Key findings: The lowland test environment influenced the performance of some characters of F7 rice (O. sativa L.) lines obtained from the hybridization of rainfed and irrigated rice genotypes based on the CV_e value. The two rice genotypes F7-4-21-11-23-3-2 and F7-4-21-11-23-6-11 emerged as potential lines for better yield traits.