Induksi Kergaman Genetik Melalui Iradiasi Sinar Gamma Padi Sawah (Oryza sativa L.) Lokal Kultivar Sicantik

Abstract

This study aimed to analyze the genetic variation of the local lowland rice (Oryza sativa L.) cultivar Sicantik in the M1 generation through gamma-ray irradiation. The research was conducted in the screen house of the Faculty of Agriculture, Universitas Sumatera Utara, at an altitude of approximately ±25 meters above sea level, from February to November 2025. The experiment used a non-factorial Randomized Block Design (RBD) with one factor consisting of four irradiation doses: G0 (control), G1 (100 Gy), G2 (200 Gy), and G3 (300 Gy). The results showed that the LD₅₀ (Lethal Dose 50) of the Sicantik cultivar due to gamma irradiation is 364.48 gray. Gamma-ray irradiation significantly affected plant height, number of tillers, number of productive tillers, flowering time, and harvest time. For yield-related parameters, irradiation also significantly influenced grain weight per hill. The 200 gray dose produced the best results.