Inheritance of resistance to Phytophthora sojae in soybean.
Inheritance of resistance to Phytophthora sojae in soybean.
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发表时间：
2009
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通讯作者：
S. Shi;Zhao Jinming;Wu Xiaoling;Guo Na;Wang Yuan-chao;Gai Junyi;Xing Han
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作者：
S. Shi;Zhao Jinming;Wu Xiaoling;Guo Na;Wang Yuan-chao;Gai Junyi;Xing Han
【Objective】 The objective of this study was to reveal the mechanisms of resistance to Phytophthora sojae in soybean [Glycine max (L.) Merr]. 【Method】 Four crosses between materials with complete or partial resistance were used to reveal the inheritance of resistance using the hypocotyls inoculation or root inoculation technique. 【Result】 The complete resistance in soybean cultivars (lines) Yudou25 and Zheng92116 was controlled by a single dominant gene (Rps), while the partial resistance in General and Conrad by one additive major gene plus additive-dominant polygene. The heritability values of resistance in development were about 90%, those of major and polygene were 41.31%-74.84% and 15.60%-50.36% in F2, and 54.21%-77.05% and 13.52%-38.24% in F2:3, respectively. The complete resistance and partial resistance were controlled by different genetic systems. 【Conclusion】 Both kinds of resistance can be used in soybean improvement, and it would be effective to conduct selection in early generations for high resistance in breeding, combining partial resistance with specific Rps genes to provide long term management of Phytophthora root rot as well as to avoid the boom-and-bust cycle of single gene deployment.
