水稻品种抗褐稻虱的遗传机制及表型稳定性的研究

本文研究了15个水稻品种的抗性遗传，品种国眉占的抗性受一对隐性基因控制，BG367－4受两对隐性基因控制；三桂占1、Suweon294、KAU1727、IR13539－100－2－2－2－3、IR749－5－2－1－1以及IR13240－108－2－2－3均受一对显性基因控制；IR25586－108－1－2－2－2受两对显性基因控制；三黄占2、三叶占1、铁六选；新惠占1、GENG77－4以及IR13427－40－2－3－3都受一对显性基因和一对隐性基因因控制，同时对12个具有不同抗性水平的水稻品种苗期的抗菌表现进行了遗传型稳定性分析。结果表明，不同品种的抗性稳定性有明显差异，TN1是极稳定的高感品种TG367－4、25586-108－1－2－2－2以及Mudgo是非常稳定的高抗;一叶占1、三桂占1和铁六这三个抗级品种的抗虫也较稳定;；而抗级品种国眉占、三黄占2、Suweon294和抗品种包选2、辐包矫21的抗虫性不稳定。

GENETICS AND PHENOTYPIC STABILITY ANALYSIS OF RESISTANCE TO THE BROWN PLANTHOPPER IN RICE VARIETIES

The genetics of resistance to the brown planthopper (BPH), Nilaparvotc lugens(Stal) was studied in 15 rice varieties. The resistance of ' Guomeizhan' was controlled by one recessive gene'. BG 367 - 4'possesed two recessive genes for the resistance . A single dominant genes conditioned the resistance in 'Sanguizhan 1' ,'Suweon 294' ,'KAU 1727','IR 13539-100-2-2-2-3','IR 7149-5-2-1-1'and'IR 13240-108-2-2-3'.Two dominant genes conveyed the resistance in 'IR25586-108-1-2-2-2'.The resistance in 'Sanhuangzhan 2' ,'Sanyezhan 1' ,'Tieliuxuan 2','Xinhuizhan 1','GENG 77-4' and 'IR 13427-40-2-3-3'was governed by one dominant and one recessive gene.Stability of resistance of 12 rice varieties with different resistant levels in seedling stage was studied. The parameters of genetypic stability of resistance were estimated by the method proposed by Tai (1971) . The results indicated that the varieties showed different levels of resistant stability. The variety of 'TN 1' was a susceptible variety with very high stability.'IR 25586-108-1-2-2-2' ,'BG 367-4' and'Mudgo' were resistant varieties with high stability. The resistance of ' Sanyezhan 1' ,' Sanguizhan 1' and ' Tieliuxuan' exhibited moderate stability, while resistance in the resistant varieties ' Guomeizhan' ,' Sanhuangzhan 2' ,' Suweon 294' and the moderately resistant varieties ' Fubaoai 21' and ' Baoxuan 2' was unstable.