DNA 마커를 이용한 벼멸구 저항성 선발 및 복합내병충성 벼 계통 육성 (Marker Assisted Selection of Brown Planthopper Resistance and Development of Multi-Resistance to Insect and Diseases in Rice (Oryza sativa L.))

서지정보

· 발행기관 : 한국육종학회
· 수록지 정보 : 한국육종학회지 / 43권 / 5호 / 413 ~ 421페이지
· 저자명 : 이종희, 여운상, 조준현, 이지윤, 송유천, 신문식, 강항원, 손재근

초록

The main objective of this study was to develop the multi-resistance lines to insects(brown planthopper; BPH, rice green leafhopper; GRH) and disease(blast; BL, bacterial blight; BB and rice stripe virus disease;RSV) with good grain quality and plant type by combining conventional breeding and marker assisted selection(MAS) and to eliminate the linkage drag effects between Bph1 gene and culm length, we conducted MAS of Bph1 gene in advanced backcross and double cross progenies.
‘Nampyeong’, ‘Junam’ and ‘Milyang220’ were used as the parent in this study. ‘Milyang220’ was used as the donor of brown planthopper resistance gene Bph1 with tall culm length. Two backcross progenies were developed using two recipients ‘Nampyeong’ carrying GRH resistance gene Grh3(t) with good grain appearance and ‘Junam’ harboring bacterial blight resistance gene Xa3 with short culm length. Two BC1 generations were resulted from the backcrossing of the F1 plants with recurrent parents ‘Nampyeong’ and ‘Junam’. The second rounds of backcrossing(BC2) were derived from the cross of selected resistant BC1F1 plants based on heterozygous genotype of RM28493 linked to Bph1 gene. The double crossed population was constructed from the cross of between each heterozygous BC2F1 plants at RM28493 locus of ‘Nampyeong*3 / Milyang220’ and ‘Junam*3/ Milyang220’., The homozygous alleles in Bph1 gene were selected using co-dominant DNA marker RM28493 in double crossed population. Eighty-five lines with multi-resistance to BL, BB, RSV, GRH and BPH were selected by bio-assay and MAS in generation of double crossing. The culm length, head rice ratio and yield of the selected multi resistance lines was ranged from 71 to 88 cm, from 51 to 93%, from 449 to 629 kg/10a. respectively. We can select a promising multi resistance line similar with ‘Nampyeong’ of major agronomic traits such as culm legnth, head rice ratio and yield. It was designated as Milyang265.
Finally this study was developed the multi resistant varieties against to insects and diseases with the good grain quality ‘Milyang265’ by the advanced backcross and double cross combining MAS and it can be used as genetic resources of multi-resistance to insect and diseases in rice breeding programs.

영어초록

The main objective of this study was to develop the multi-resistance lines to insects(brown planthopper; BPH, rice green leafhopper; GRH) and disease(blast; BL, bacterial blight; BB and rice stripe virus disease;RSV) with good grain quality and plant type by combining conventional breeding and marker assisted selection(MAS) and to eliminate the linkage drag effects between Bph1 gene and culm length, we conducted MAS of Bph1 gene in advanced backcross and double cross progenies.
‘Nampyeong’, ‘Junam’ and ‘Milyang220’ were used as the parent in this study. ‘Milyang220’ was used as the donor of brown planthopper resistance gene Bph1 with tall culm length. Two backcross progenies were developed using two recipients ‘Nampyeong’ carrying GRH resistance gene Grh3(t) with good grain appearance and ‘Junam’ harboring bacterial blight resistance gene Xa3 with short culm length. Two BC1 generations were resulted from the backcrossing of the F1 plants with recurrent parents ‘Nampyeong’ and ‘Junam’. The second rounds of backcrossing(BC2) were derived from the cross of selected resistant BC1F1 plants based on heterozygous genotype of RM28493 linked to Bph1 gene. The double crossed population was constructed from the cross of between each heterozygous BC2F1 plants at RM28493 locus of ‘Nampyeong*3 / Milyang220’ and ‘Junam*3/ Milyang220’., The homozygous alleles in Bph1 gene were selected using co-dominant DNA marker RM28493 in double crossed population. Eighty-five lines with multi-resistance to BL, BB, RSV, GRH and BPH were selected by bio-assay and MAS in generation of double crossing. The culm length, head rice ratio and yield of the selected multi resistance lines was ranged from 71 to 88 cm, from 51 to 93%, from 449 to 629 kg/10a. respectively. We can select a promising multi resistance line similar with ‘Nampyeong’ of major agronomic traits such as culm legnth, head rice ratio and yield. It was designated as Milyang265.
Finally this study was developed the multi resistant varieties against to insects and diseases with the good grain quality ‘Milyang265’ by the advanced backcross and double cross combining MAS and it can be used as genetic resources of multi-resistance to insect and diseases in rice breeding programs.

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