Botany of this species is encoded by about 135 million base pairs of DNA, forming one of the smallest genomes among flowering plants. "Arabidopsis" was the first plant to have its genome sequenced, in 2000. The sequencing of some other relatively small genomes, of rice ("Oryza sativa") and "Brachypodium distachyon", has made them important model species for understanding the genetics, cellular and molecular biology of cereals, grasses and monocots generally. Model plants such as "Arabidopsis thaliana" are used for studying the molecular biology of plant cells and the chloroplast. Ideally, these organisms have small genomes that are well known or completely
Scirpophaga gilviberbis on "Oryza" species, including "Oryza sativa". Scirpophaga gilviberbis Scirpophaga gilviberbis is a moth in the Crambidae family. It was described by Zeller in 1863. It is found on the Comoros and in the Democratic Republic of Congo, Kenya, South Africa, Zambia, India, Indonesia (Java, Sulawesi), Myanmar, Singapore, Thailand and Vietnam. The wingspan is 20–22 mm for males and 23–35 mm for females. The forewings of the males are ochreous with some fuscous scales. The hindwings are white, except for the costal area and the apex which are ochreous. Females have white fore- and hindwings. The anal tuft is whitish grey