The Relationship between Pollen Viability and Filled Grains in Native Indonesian Rice Cultivars under High Temperature at Flowering Stage

Background: The research was conducted to screen rice cultivars with resistance ability high-temperature conditions and analyze the relationship between pollen viability filled grain of native Indonesia cultivars. Methods: seeds were germinated, sown into a tray then transplanted pots sandy loam compost 3:1. After 20% flowering, four each cultivar kept under ambient temperature (28-32°C) other transferred (33-38°C) conditions. Pollen stainability germination using IKI solution by germinating them in vitro respectively before being viewed light microscope. Yield characters analyzed obtain viability. Result: Percentage germination, empty grains significantly differed two t-test. Ciherang Sigeudop resistant for treatment, percentage more than 85%. There strong at (r=0.95; p less 0.01) high (r=0.94; 0.01). Rice that show would produce grains.