벼멸구 저항성 계통선발을 위한 MAS의 선발효율 비교

Comparison of Selection Efficiency between Marker-Assisted Selection and Phenotypic Selection for Development of Brown Planthopper Resistance Lines in Rice

This study presents a case study designed to compare the selection efficiency between phenotypic selection (PS) and marker-assisted selection (MAS) in breeding of resistance lines to brown planthopper (BPH). The efficiency between PS and MAS were compared with four population such as the F 2 , RILs (F 6 ), DH, and backcrosse (BC 6 F 5 ) population, derived from a cross ‘Samgang / Nagdong’. The resistance lines were selected using two markers, RM28493 and BpE18-3, related to BPH resistance were screened as resistance lines over 95% in PS. The costs required for BPH screening in the MAS system account for approximately 32% of the total costs of PS. The period needed to select the resistance plants was 30 days in PS and 7 days in MAS. Based on the results, we could establish the breeding system for selection of BPH resistance lines by MAS.