论文部分内容阅读
对烟草赤星病两个抗性因素遗传的 1/ 2 7( 7+1)双列杂交分析表明 ,病斑数量和病斑大小的遗传都符合加性 显性模型。病斑数量的遗传属部分显性类型 ,显性基因主要表现为减效 ;病斑大小的遗传属完全显性类型 ,显性基因为增效基因。 1996、1997两年的田间试验结果和苗期离体叶片接种的结果基本一致。烟草对赤星病病菌侵入的抗性较抗病斑扩展的能力更容易通过品种间杂交传递给后代。配合力分析表明 ,一些组合具有较好的抗侵入特殊配合力 ,另一些组合具有良好的抗扩展特殊配合力。抗×感组合Beinhart10 0 0 - 1×NC82两个抗性因素特殊配合力均较好 ,在抗病育种中有较高的利用价值
The 1/2 7 (7 + 1) double-row hybridization analysis of two resistant factors to tobacco brown spot disease showed that both the number of lesions and the inheritance of lesion size were in line with the additive dominant model. The genetic number of lesion is part of the dominant type, dominance of the dominant gene performance as a lessening; lesion size is completely dominant genetic type, dominance gene as a synergistic gene. The field test results in 1996 and 1997 were basically the same as those of inoculated leaves in seedling stage. Tobacco resistance to brown spot disease invade resistance than the ability to expand disease spots more easily passed through the inter-species hybrids to offspring. Combining ability analysis showed that some combinations have good resistance to invade special combining ability, while others have good resistance to expanding special combining ability. Anti-flu combination Beinhart10 0 0 - 1 × NC82 The two special combining ability of resistance were better, which had higher value in resistance breeding