摘要
[ Objective] This study was to breed rice cultivars with multi-resistance to Orseolia oryzae （Wood-Mason）. [ Method] The Guangxi local cultivar GX-M001 （Jiangchao） with high resistance to Orseolia oryzae （Wood-Mason） was used to hybrid with the known resistance cultivars ＂Kangwenqingzhan＂ （harboring GM5 gene）, OB677（ harboring GM3 gene） from Sri Lanka, HT1350 and high yield end quality cultivar ＂ Guiruanzhan＂. [ Result] Through pyramiding the multi-resistant genes via routine hybridization, the general resistances of the hybrids were remarkably enhanced. The grades of resistance were also improved, many of the combinations were endowed with a resistance at immune level （grade 0） ; and interestingly, the respective hybridization of GX-M001 （high resistance） with OB677（ medium resistance） and HT1350（suscepti- ble） also generate two lines at immune level, which is probably the effects of additive effects of genes.[ Conclusion] By routine hybridization, multiple genes were successfully pyramided, thus generating novel rice lines with multiple resistances. For the rice breeding scientists at the grass-roots level, the resistance-resistance pyramiding is an effective approach to breed high resistance cultivars.
抗源的发掘和利用是创新抗稻瘿蚊育种材料的有效途径，笔者在广西品种资源中发现了新的抗性品种GX—M001，经与抗蚊青占等位性测定，初步认为其与抗蚊青占基因（GM6）不等位，可能是一个新的抗性基因。为此，笔者选用GX—M001抗源与抗蚊青占等抗性品种杂交，培育出新的多抗创新材料。
基金
Supported by National Natural Science Foundation of China(30760117)
National Key Technology R &D Program (2007BAD68B01)~~
