Agronomics characteristics of two rice F1 lines from the crossing of inpari 32 x Pokkali and Inpari 33 x Pokkali

The growth of rice plants has been significantly impacted by the increase in the area of rice fields affected by salt stress. The Indonesia government has released many high-yield rice varieties, but most of them are not saline adaptive. Therefore, it is necessary to introduce the salinity-tolerant trait to these rice varieties. In our experiment, we crossed salt-tolerant Pokkali rice with two popular Indonesian rice varieties: Inpari 32 and Inpari 33 to create Inpari 32/Pokkali and Inpari 32/Pokkali F1 lines. For the detection of salt tolerance genotype, we employed the MAS molecular method to detect the presence of Saltol locus in the resulting F1 plant. Unfortunately, Saltol-related SSR markers such as RM10793, RM3412, AP3206 and did not show polymorphisms between Pokkali, Inpari 32, Inpari 33, and the progenies from each cross-pollination combination. Using the phenotype identification strategy, the F1 plants have been isolated further characterization. Our result showed that both Inpari 32/Pokkali and Inpari 32/Pokkali F1 lines showed 147 cm and 152 cm of plant heights, 31 and 29 of total tillers, 26 cm and 27 cm of panicle lengths, 225 and 248 grains per panicle, 79.35 g and 99 g of grain yield per plant, and 27.35 and 26.7 g per 1000 grains. We also identified that all selected F1 plants produced red-coloured kernel which further confirmed that all selected F1 plants were the true progenies of Inpari 32/Inpari 33 and Pokkali cross pollination.