Genetic advantages of highland local rice in South Sumatra

Abstract

Identification of genetic superiority is needed to anticipate problems such as local rice extinction and environmental stress due to global climate change. This study aims to determine the genetic superiority of local upland rice in South Sumatra, and the opportunities for its use as a donor gene in the creation of new high-yielding varieties. A research on eight local rice was conducted in May-September 2021. The method and scope of the study are inventory of local rice, identification of agronomic characters, and identification of Zn and Fe content in grain components. Quantitative characters identified as important genes are panicle length and 1000 grain weight. Panicle length (>35 cm) is an important character of Selebur Rimbe, Putih Rice and Jambat Teras. The 1000 grains weight of Selebur Rimbe rice is close to 30 g (28.95 g). The [Zinc] character of local rice bran significantly determines [Zn] polished rice (r = 0.701*). While determining character [Fe] of brown rice is empty grain (r = - 0.707*). Information on the advantages of this rice genetics can be utilized through implementation of crosses with various superior varieties of rice. The expected output from this effort is a superior rice variety that has characteristics including high yield, high [Zn] brown rice grains, low [Fe] husk, as well as adaptive and stable at various altitudes.