Marker selection on F2 population of Setail and ARC 12596 crossing

Abstract

Abstract Tungro is an important rice disease. Rice tungro disease can decrease rice production. Resistance variety can be applied in plant breeding activities. Furthermore, using tungro resistance varieties more effective and efficient to control tungro disease. But, using resistance varieties continuously can breakdown resistance level because this character has durability. Therefore, the breeding of tungro resistance varieties should be done continuously. Breeding of tungro resistance can be held by using parental which resistance variety of tungro cross is with parental which have a specific location and have liked by farmers. This combination has a purpose to get tungro resistance which has a specific location. After crossing, the next step is to select the filial. This step should be done to evaluate the filial of cross-pollination and to get early line tungro resistance for the next material selection. The selection can be held by conventional and in-conventional or mix of both. The best selection is using mix procedure between conventional and in-conventional. Conventional selection is based on the standard evaluation system for rice (SES) IRRI. An in-conventional technique using SSR because it has an accurate technique to get genotype selection and purity evaluation. The purpose of this research is to know which SSR marker have linkage with tungro resistance in filial of a cross between tungro resistance parental and specific location. There are 3 markers SSR which can differentiate Setail and ARC 12596 to tungro disease those are RM 314, RM 212, and RM 288. Marker RM 314 has a chance to be a tungro resistance linkage marker from ARC 12596.