Yield Evaluation of Promising Rice (Oryza sativa L.) Lines

Several promising rice (Oryza sativa L.) lines derived from hybridization between Sintanur x PTB33 (SP) and IR64 x PTB33 (IP) have been obtained.These lines were developed by phenotypic screening for the brown planthopper (BPH) resistance using the Standard Seedbox Screening Test (SSST) and confirmation by SSR (simple sequence repeats) molecular markers.However, yield evaluation for these particular lines is highly required in order to evaluate performance and obtain the yield of F5 rice lines.The experiment was arranged in an augmented randomized block design for 15 genotypes as treatment and replicated 4 times of the check varieties, i.e., namely Sintanur, IR64, Ciherang, and Inpari13.Data analysis was performed by using the Analysis of Variance and the Least Significant Increase (LSI), and clustering analysis using R studio for agronomic, yield components, and yield.The results showed that a significant different of test line traits with those of the check was found on days to 50% flowering, productive tiller number, panicle length, grain number per panicle, and total grain yield.Line SP-87-25-7 had a grain weight of 16.36 g and was significantly different from IR64, Ciherang, and Inpari13, except for cv.Sintanur.Clustering analysis divided the genotypes into three clusters and the principal component analysis accounted for 70.0% of the total variations among the traits studied.The SP-87-25-7 was selected based on the performance to be further developed and registered as a new high-yielding rice line.