Asian Journal of Agriculture and Biology https://doi.org/10.35495/ajab.2026.085
Physical characteristics and the relationship between genetic diversity, phenotypic diversity, heritability test and morphological character in several varieties of lowland rice (Oryza sativa L.)Baharudin1 , Abdul Fattah , I. Nyoman Widiarta , Susilawati , Ayyub Ar Rahman* , Dwi P. Widiastuti , Twenty Liana , Muhamad Hidayanto , Khojin Supriadi , Sri Wahyuni Budiarti , M. Sudjak Saenong , Abdi Negara , Asni Ardjanhar , Rahmi H , Muh. Asaad , Entis Sutisna , Ida Andriani , Amiruddin Syam , La Karimuna , Robiatul Adawiyah
Abstract Plant characteristics, genetic diversity, and heritability are some of the factors that influence rice growth and production. This study aims to determine the physical characteristics and the relationship between genotype variants, heritability tests, and genetic progress that can contribute to rice production in lowland irrigated rice fields. This study was conducted from October 2022 to March 2023 in North Buton Regency, Southeast Sulawesi. The design used in this study was a Randomized Block Design with 7 varieties and 3 replications. The research data were analyzed based on the procedures of variance, genetic variance, heritability, agromorphological characteristics, partial correlation, and cross tests. The results obtained showed that the highest plant height characteristics were found in Ciherang (110 cm), the highest plant age was found in Ciherang (120 days). The characteristics of the 7 varieties tested, lodging properties, 57.14% were somewhat resistant to lodging and 42.86% were resistant to lodging. Pest resistance properties, tungro resistance (8.04%), resistance to brown planthopper (57.14%), and resistance to leaf blight (85.71%). Furthermore, regarding the correlation relationship, dry grain yield is positively correlated with the number of productive tillers, plant height, panicle length, grain weight, number of empty grains, full grains, and weight per 1000 grains. The genetic variation values of plant height, number of panicles, grain weight, and weight per 1000 grains are higher in the Inpari-7, Inpari-11, Inpari-13, Inpari-14, Inpari-15, Inpari-20 varieties. The highest dry grain yield is found in Inpari-13, Inpari-15, and Inpari20 compared to Ciherang. Keywords: Rice variety, Low land rice, Characteristics, Genetic diversity, Heritability, Grain yield
