摘要
稻瘟病和白叶枯病是水稻的两大主要病害。通过分子标记辅助选择将水稻种质H4的主效稻瘟病抗性基因Pi46(t)与CBB23的广谱白叶枯病抗性基因Xa23聚合到一起,对8个目标株系进行苗期稻瘟病抗谱测定和成株期白叶枯病抗性测定。结果表明:8个株系对测试的稻瘟病菌株均具有较广的抗谱、远高于CBB23的抗谱;对白叶枯病达到抗或高抗水平、远优于H4的抗性水平。说明2个抗性基因得到了有效聚合,实现了创制双抗种质的目的。
The bacterial blight （ BB） and blast are two major diseases of rice. A major resistance （ R） gene to blast in rice accession H4,Pi46（t）and a broad-spectrum R gene to Xanthomonas oryzae strains,Xa23,were pyrami-ded via MAS in this study. Eight target lines were performed with blast resistance spectrum at seedling stage and BB resistance at adult stage. It was demonstrated that all the eight lines conferred broad resistance spectra to the tested blast isolates,which were wider than that of CBB23. Likely,all the eight lines showed resistance or high resistance to the tested BB strain,whose resistance were significantly better than that of H4. It was illustrated that the two R genes were pyramided effectively in this study,and rice lines showing resistance to both blast and BB were developed.
出处
《华北农学报》
CSCD
北大核心
2014年第1期203-207,共5页
Acta Agriculturae Boreali-Sinica
基金
国家“863计划”课题(2012AA101201)
广东省自然科学基金重点项目(S2011020001513)
广东省科技计划项目(2011A020102004)
关键词
水稻
分子标记
稻瘟病
白叶枯病
Rice
Molecular marker
Rice blast
Bacterial blight
