The novel, major locus Rpi-phu1 for late blight resistance maps to potato chromosome IX and is not correlated with long vegetation period
The novel, major locus Rpi-phu1 for late blight resistance maps to potato chromosome IX and is not correlated with long vegetation period
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DOI：
10.1007/s00122-006-0336-9
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发表时间：
2006-08-01
影响因子：
5.4
通讯作者：
Zimnoch-Guzowska, E.
中科院分区：
文献类型：
--
作者：
Sliwka, J.;Jakuczun, H.;Zimnoch-Guzowska, E.
尽管选育抗马铃薯晚疫病菌的历史悠久，但这种卵菌仍然是世界范围内最重要的马铃薯病原菌。晚疫病高抗性与植被周期长的相关性是制约不同成熟度抗病品种选育进展的瓶颈之一。茄子是一个有效的晚疫病抗性来源，通过与马铃薯双单倍体进行种间杂交，将其转入栽培基因库。一个新的主效抗病基因Rpi-phu1被定位在标记GP94近端6.4 cM的马铃薯IX染色体上，该基因很可能来源于金针菇，具有广谱抗晚疫病的特性。在5年的定量表型评估中，rpi-phu1在分离的小叶、块茎切片和整个块茎试验中都是高效的。抗性与植被周期长短无显著相关性。我们的发现为早期育种和抗病提供了一个新的抗源。侵袭性土豆。
Despite the long history of breeding potatoes resistant to Phytophthora infestans, this oomycete is still economically the most important pathogen of potato worldwide. The correlation of high levels of resistance to late blight with a long vegetation period is one of the bottlenecks for progress in breeding resistant cultivars of various maturity types. Solanum phureja was identified as a source of effective late blight resistance, which was transferred to the cultivated gene pool by interspecific crosses with dihaploids of Solanum tuberosum. A novel major resistance locus, Rpi-phu1, derived most likely from S. phureja and conferring broad-spectrum resistance to late blight, was mapped to potato chromosome IX, 6.4 cM proximal to the marker GP94. Rpi-phu1 was highly effective in detached leaflet, tuber slice and whole tuber tests during 5 years of quantitative phenotypic assessment. The resistance did not show significant correlation with vegetation period length. Our findings provide a well-characterized new source of resistance for breeding early and resistant-to-P. infestans potatoes.