Bacterial Leaf Blight (BLB)  is the most important yield limiting factor in Nepalese rice. BLB resistance rice varieties are highly demanding in the country. Breeding efforts for developing disease  resistant  depends  on  the  availability  and  use  of resistant  gene  donors.  Ninety  six Nepalese  rice  accessions  were  screened using  eight  SSR  markers  and  one STS  marker for presence  and  absence  of  BLB  resistance  gene.   We  detected  BLB  resistance  gene Xa-10  on two accessions,  Xa-13  on  six  accessions,  Xa-7  on  23  accessions, Xa-10  on  five accessions, Xa-3  and  Xa-4  on  52  accessions,  Xa-5  on 25  accessions,  Xa-8 on  30  rice  accessions.  No  any rice  accessions  have  Xa-21.  Similarly,   17  rice  accessions  showed  three  and  more than  three BLB    resistance   genes.  Presence  of  Xa-13   on   susceptible  check   variety  CNTRL-85033 confirmed  that different  BLB  pathotypes  are  active  in Nepalese rice field  and  need  of gene pyramiding for durable  resistance.

Bacterial Leaf Blight (BLB)  is the most important yield limiting factor in Nepalese rice. BLB resistance rice varieties are highly demanding in the country. Breeding efforts for developing disease  resistant  depends  on  the  availability  and  use  of resistant  gene  donors.  Ninety  six Nepalese  rice  accessions  were  screened using  eight  SSR  markers  and  one STS  marker for presence  and  absence  of  BLB  resistance  gene.   We  detected  BLB  resistance  gene Xa-10  on two accessions,  Xa-13  on  six  accessions,  Xa-7  on  23  accessions, Xa-10  on  five accessions, Xa-3  and  Xa-4  on  52  accessions,  Xa-5  on 25  accessions,  Xa-8 on  30  rice  accessions.  No  any rice  accessions  have  Xa-21.  Similarly,   17  rice  accessions  showed  three  and  more than  three BLB    resistance   genes.  Presence  of  Xa-13   on   susceptible  check   variety  CNTRL-85033 confirmed  that different  BLB  pathotypes  are  active  in Nepalese rice field  and  need  of gene pyramiding for durable  resistance.