Flax latitudinal adaptation at LuTFL1 altered architecture and promoted fiber production
Flax latitudinal adaptation at LuTFL1 altered architecture and promoted fiber production
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LuTFL1 的亚麻纬度适应改变了结构并促进了纤维生产
DOI：
10.1101/178772
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Gutaker R
中科院分区：
文献类型：
--
作者：
Gutaker R
大约一万年前在近东驯化后，几种创始作物传播并适应了欧洲纬度。到达北纬地区后，驯化亚麻的结构发生了变化，变得更适合纤维生产而不是石油，具有更长的茎、更小的种子和更少的腋枝。作物的纬度适应通常会导致开花时间的变化，通常涉及 PEBP 基因家族，这些基因也有可能影响植物结构。我们鉴定了亚麻基因组中的 PEBP 家族基因，描述了野生和栽培亚麻中随纬度范围变化的两个基因座 LuTFL1 和 LuTFL2 的分子多样性，并表明栽培亚麻接收了来自更北方野生亚麻种群的 LuTFL1 等位基因。与使用限制性位点相关基因座确定的不同纬度的亚麻群体结构的基因组背景相比，LuTFL1等位基因表现出的分化水平与北方相关等位基因(III)和北方相关等位基因(I)的选择一致。我们还证明LuTFL1等位基因与不同的开花时间相关，并且通过在拟南芥中的异源表达，LuTFL1是拟南芥中TFL1的功能同源物，并且能够改变开花时间和植物结构。我们得出的结论是，特殊的纤维亚麻类型是栽培亚麻自然适应高纬度地区的结果。意义陈述通常认为驯化植物获得了仅对人类有用的性状。这项研究的不同寻常之处在于，所涉及的驯化植物亚麻在驯化过程中具有适应能力，既适合耕种者，也适合植物，从而导致种子尺寸更小。在这种情况下，随着亚麻变得适合纤维生产，这种适应可能为随后的纺织革命开辟了道路。
After domestication in the Near East around 10,000 years ago several founder crops spread and adapted to European latitudes. On reaching northerly latitudes the architecture of domesticated flax changed becoming more suitable to fiber production over oil, with longer stems, smaller seeds and fewer axillary branches. Latitudinal adaptations in crops typically result in changes in flowering time, often involving the PEBP family of genes that also have the potential to influence plant architecture. We identify PEBP family genes in the flax genome, describe molecular diversity of two loci,LuTFL1andLuTFL2in wild and cultivated flax that vary over latitudinal range, and show that cultivated flax receivedLuTFL1alleles from more northerly wild flax populations. Compared to a genomic background of population structure of flaxes over latitude determined using restriction site-associated loci, theLuTFL1alleles display a level of differentiation that is consistent with selection both for a northern associated allele (III) and against a southern associated allele (I) in the north. We also demonstrate thatLuTFL1alleles are associated with differing flowering time, and through heterologous expression inArabidopsis thalianathatLuTFL1is a functional homolog ofTFL1inArabidopsis thalianaand is capable of changing both flowering time and plant architecture. We conclude that specialized fiber flax types formed as a consequence of a natural adaptation of cultivated flax to higher latitudes.Significance statementIt is usually assumed that domesticated plants acquire traits that are useful to humans alone. The unusual twist in this study is that the domesticated plant involved, flax, has an adaptation under domestication that serves both the cultivators and the plant, resulting in smaller seed size. In this case, the adaptation could have opened the way for the ensuing textile revolution as flax became predisposed for fiber production.
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影响因子：
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作者：
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通讯作者：
Julio A. Rozas Liras
影响因子：
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作者：
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作者：
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亚麻自然交叉 1
影响因子：
2.1
作者：
A. Dillman
通讯作者：
A. Dillman
DOI：
--
发表时间：
2006
期刊：
Genetic Resources and Crop Evolution 53・3
影响因子：
--
作者：
Senda;Takayuki
通讯作者：
Takayuki