文献类型： 会议论文
第一作者： T. W. MEW
作者： T. W. MEW 1 ; F. M. WANG 2 ; J. T. WU 3 ; K. R. LIN 4 ; G. S. KHUSH 5 ;
作者机构： 1.International Rice Research Institute (IRR1). P.O. Box 933, Manila, Philippines
2.Jiangsu Academy of Agricultural Sciences, Nanjing, China
3.The South China Agricultural University,Guangzhou, China
4.Sichuan Academy of Agricultural Science, Zhendo, China
5.IRRl, P.O. Box 933, Manila, Philippines
会议名称： International symposium on hybrid rice
主办单位：
页码： 1-12
摘要： Reports from China show that the incidences of stem borer (SB), whitebacked planthopper, leaf roller, bacterial blight (BB), sheath blight, and virus diseases are more frequent on hybrid rice than on conventional varieties.Local outbreaks of diseases such as downy mildew, false smut, and kernel smut occur frequently on hybrid rice. Brown planthopper (BPH) infestation, however, is negligible when IR26, which possesses a dominant gene Bph-1 for resistance, is used as the R line in the hybrid combination. Although SB occurs often on hybrids, their growth vigor and higher tillering capacity appear to compensate for damage. Resistance of either the A or R line appears to dequately confer resistance to the hybrid. Several hybrid combinations derive their resistance to BPH and green leafhopper from either parental line. Resistance to insect vectors extends to protection from virus diseases. Inheritance of resistance to BB and blast is often dominant or partially dominant, indicating the potential to breed resistance into hybrid rice. Although there is no evidence that susceptibility to any rice pest or disease is related to cytoplasmic factors, pest incidence on hybrid rice should be monitored and male sterile cytoplasm evaluated to ensure genetic strength.
分类号： Q781`S334
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