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Transferring clubroot resistance from Chinese cabbage (Brassica rapa) to canola (B. napus)

文献类型: 外文期刊

作者: Hirani, Arvind H. 1 ; Gao, Feng 2 ; Liu, Jun 2 ; Fu, Guohua 2 ; Wu, Chunren 2 ; Yuan, Yuxiang 3 ; Li, Wei 3 ; Hou, Jinna; 1 ;

作者机构: 1.Univ Manitoba, Dept Plant Sci, Winnipeg, MB R3T 2N2, Canada

2.Monsanto Canada Inc, 900 One Res Rd, Winnipeg, MB R3T 6E3, Canada

3.Henan Acad Agr Sci, Inst Hort, Changsha, Henan, Peoples R China

关键词: marker-assisted selection;interspecific hybridization;Chinese cabbage;canola;clubroot resistance

期刊名称:CANADIAN JOURNAL OF PLANT PATHOLOGY ( 影响因子:2.442; 五年影响因子:1.993 )

ISSN:

年卷期:

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收录情况: SCI

摘要: Clubroot, caused by Plasmodiophora brassicae, is one of the most important diseases of Brassica species worldwide, including vegetable and oilseed crops. A dominant clubroot resistance gene from B. rapa (Chinese cabbage) was previously fine mapped and molecular markers were developed in Chinese cabbage that could be used for marker-assisted selection (MAS) in other Brassica crops. To transfer this clubroot resistance gene to B. napus (canola), an interspecific hybridization was made between B. napus (canola) and B. rapa (Chinese cabbage). Subsequently, the F-1 was backcrossed to the canola recurrent parent for three generations to produce BC1, BC2 and BC3 progenies. Using these populations, simple sequence repeat (SSR) markers flanking the clubroot resistance gene were used to perform MAS in canola. These molecular markers were then evaluated in 13 different canola and rapeseed quality genotypes in B. napus and B. rapa. These markers exhibited high reliability in identifying clubroot resistance in this diverse set of Brassica genotypes. Clubroot resistance also co-segregated with the SSR markers flanking the clubroot resistance gene in the BC3 and BC3S1. The segregation ratio of resistant and susceptible individuals in the BC3 supported the expected 1:1 ratio for the segregation of a single Mendelian gene. BC3S1 families with homozygous clubroot resistance were developed during this process, and should be valuable sources of clubroot resistance in B. napus breeding activities.

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