论文部分内容阅读
在对 2个主栽品种 (生产上推广的当家杂交稻组合 )和 2个间栽品种 (优质感瘟 )进行 RGA遗传背景研究的基础上 ,配成 4个混合间栽组合。经在祁东 (丘陵 )小区试验和示范比较 ,结果都表明品种混合间栽后 ,间栽品种叶瘟的防治效果达 48.86 %～ 79.91% ,穗瘟的防治效果达 12 .38%～ 6 3.5 7% ;混合间栽的主栽品种与净栽主栽品种比较 ,叶瘟和穗瘟的病情严重度差异不大。在产量上 ,混合间栽比净栽均表现出不同程度的增产 ,幅度在 1.5 7%～ 12 .71%。基于本研究结果 ,选择抗瘟性遗传背景差异大 ,株高差异突出的品种以 1行优质稻间 5行主栽品种混合栽培 ,能起到控瘟增产的作用。
On the basis of RGA genetic background analysis of two main cultivars (hybrid rice combination promoted in production) and two interspecific hybrids (high-quality flu), four hybrid combinations were planted. After the experiment in Qidong (hilly) plot and demonstration comparison, the results showed that the control effect of interplanting variety was between 48.86% and 79.91%, and the control effect of frost blast reached 12.38% -6.5 7%. Compared with the net cultivated main cultivars, there was no significant difference in the severity of disease between the leaf blast and the panicle blast. In terms of yield, mixed-planted than net planted showed different levels of yield, range 1.57% ~ 12 .71%. Based on the results of this study, the selection of cultivars with large differences in genetic background of blast resistance and outstanding differences in plant height was conducted with five main cultivars of high-quality rice in one row, which could play a role of controlling pest and increasing yield.