Naturally occurring allele diversity allows potato cultivation in northern latitudes
Naturally occurring allele diversity allows potato cultivation in northern latitudes
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DOI：
10.1038/nature11912
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发表时间：
2013-03-14
期刊：
影响因子：
64.8
通讯作者：
Bachem, Christian W. B.
中科院分区：
文献类型：
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作者：
Kloosterman, Bjorn;Abelenda, Jose A.;Bachem, Christian W. B.
马铃薯（Solanum tuberosum L.）起源于安第斯山脉，并进化出短日照依赖的块茎形成作为营养繁殖策略。在这里，我们描述了确定一个中央调节器的植物成熟和启动块茎发育的主要效应的数量性状基因座。我们表明，该基因属于DOF（单指DNA结合）转录因子家族，并通过充当昼夜节律钟和StSP 6A移动的块茎化信号之间的介体来调节块茎化和植物生命周期长度（2）。我们还表明，自然等位基因变异逃避翻译后的光调控，允许马铃薯原产地的地理中心以外的种植。马铃薯属于茄科植物，是世界上最重要的粮食作物之一。这种一年生植物起源于南美洲的安第斯地区（3）。马铃薯从地下茎中长出块茎，地下茎被称为匍匐茎。它的赤道起源使马铃薯基本上依赖短日照结薯，而马铃薯在北方纬度的春夏长日照条件下不能结薯。当引进温带地区，野生材料将形成块茎的过程中，秋季缩短日照长度。因此，在马铃薯中产生欧洲马铃薯类型（4）的第一个选择的性状之一可能是长日驯化以形成块茎。马铃薯育种者可以利用结薯开始和生命周期长度的自然变化，从而为不同纬度、收获时间和市场进行品种育种。
Potato (Solanum tuberosum L.) originates from the Andes and evolved short-day-dependent tuber formation as a vegetative propagation strategy. Here we describe the identification of a central regulator underlying a major-effect quantitative trait locus for plant maturity and initiation of tuber development. We show that this gene belongs to the family of DOF (DNA-binding with one finger) transcription factors' and regulates tuberization and plant life cycle length, by acting as a mediator between the circadian clock and the StSP6A mobile tuberization signal(2). We also show that natural allelic variants evade post-translational light regulation, allowing cultivation outside the geographical centre of origin of potato. Potato is a member of the Solanaceae family and is one of the world's most important food crops. This annual plant originates from the Andean regions of South America(3). Potato develops tubers from underground stems called stolons. Its equatorial origin makes potato essentially short-day dependent for tuberization and potato will not make tubers in the long-day conditions of spring and summer in the northern latitudes. When introduced in temperate zones, wild material will form tubers in the course of the autumnal shortening of day-length. Thus, one of the first selected traits in potato leading to a European potato type(4) is likely to have been long-day acclimation for tuberization. Potato breeders can exploit the naturally occurring variation in tuberization onset and life cycle length, allowing varietal breeding for different latitudes, harvest times and markets.