大豆品种抗锈病遗传的研究

本研究利用4个对锈病抗性反应不同的大豆品种,配制双列杂交,并采用离体叶片人工接种鉴定F_1、F_2、B_1C_1、B_1C_2、杂种抗性的方法,研究了大豆抗锈病的遗传。研究结果表明,4个品种的抗锈性遗传基础显著不同,抗病品种PI459025的抗锈性受一个显性基因控制,耐病品种的耐病性受多基因控制,并有超显性作用存在。抗性的回交效应明显,受细胞核基因控制。抗性的一般配合力和特殊配合力均重要,抗性的广义遗传力和狭义遗传力均较高。

STUDY ON INHERITANCE OF RESISTANCE TO RUST IN SOYBEAN

Four soybean (Glycine max L. ) lines differing in their reactions to rust (phahopsora pachyrhizi syd. )were used to make a diallel cross,and resistance identification in F1, F 2,B1C1 and B1C2 by detached leaf inoculation in laboratory was conducted in this study to explore the inheritance of resistance in soybean to rust. The results revealed that the genetic backgrounds in the four genotypes for their reactions to rust were different. The resistance of the resistant line PI459025 was controlled by a single dominant gene, while the tolerance in AGS129 and AGS181 might be controlled by multiple genes and superdominance was also observed for tolerance. The back crossing effects for resistance were significant which meant the resistance was controlled by nuclear gene(s). The general combining ability and speciafic combining ability for resistance were both important The heritabilities of resistance were high.