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Yan Li, Peter M. Hirst, Yizhen Wan, Yingjiao Liu, Qian Zhou, Hua Gao, Yunzhong Guo, Zhengyang Zhao, Leicun Wang, and Mingyu Han

A. alternata apple pathotype in Japan or Korea ( Abe et al., 2010 ; Sawamura, 1990 ; Shin et al., 1986 ). Alternaria leaf blotch and Marssonina blotch were more prevalent in Shaanxi province than in northeast China owing to ecological

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Ying Li, Liyi Zhang, Zhen Zhang, Peihua Cong, and Zong-Ming Cheng

susceptible apple trees ( Sawamura, 1990 ). The disease is caused by Alternaria alternata apple pathotype and was first reported in the United States ( Roberts, 1924 ) but then was not considered a serious pathogen ( Filajdic, 1995 ). Currently, the disease

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Akihiro Itai, Takaaki Igori, Naoko Fujita, Mayumi Egusa, Motoichiro Kodama, and Hideki Murayama

spot disease being a major objective in Japan ( Itai, 2007 ; Kajiura, 1994 ). Black spot disease, which is caused by a Japanese pear pathotype of Alternaria alternata (Fr.) Keissler, is one of the most serious diseases in Japanese pear cultivation in

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Akihiro Itai and Naoko Fujita

Japanese pear pathotype), scab, and fruit ethylene production ( Banno et al., 1999 ; Sassa et al., 1997 ; Takasaki et al., 2004 ; Terakami et al., 2006 ). Thus, these markers can be used for marker-assisted selection of these four traits. In conclusion