Flax latitudinal adaptation at LuTFL1 altered architecture and promoted fiber production.
Flax latitudinal adaptation at LuTFL1 altered architecture and promoted fiber production.
复制标题
LuTFL1 的亚麻纬度适应改变了结构并促进了纤维生产。
DOI：
10.1038/s41598-018-37086-5
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发表时间：
2019
影响因子：
4.6
通讯作者：
Gutaker RM
中科院分区：
文献类型：
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作者：
Gutaker RM
大约10,000年前在近东驯化后，包括亚麻在内的几种创始作物传播到了欧洲纬度。当到达北纬时，驯化亚麻的结构变得更适合于比油更适合纤维生产，茎更长，种子更小，腋枝更少。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的结构。野生亚麻和栽培亚麻基因组中的两个PEBP家族基因LuTFL1和LuTFL2在不同的纬度范围内存在差异，栽培亚麻接收来自北方野生亚麻种群的LuTFL1等位基因。与纬度亚麻种群结构的背景相比，LuTFL1等位基因表现出与北方对等位基因III的选择一致的分化水平。我们通过在拟南芥中的异源表达证明了LuTFL1是拟南芥中TFL1的功能同源物，能够改变开花时间和植物结构。我们得出结论，特殊的纤维亚麻类型可能是栽培亚麻自然适应高纬度的结果。
After domestication in the Near East around 10,000 years ago several founder crops, flax included, spread to European latitudes. On reaching northerly latitudes the architecture of domesticated flax became 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. Two PEBP family genes in the flax genome,LuTFL1andLuTFL2, vary in wild and cultivated flax over latitudinal range with cultivated flax receivingLuTFL1alleles from northerly wild flax populations. Compared to a background of population structure of flaxes over latitude, theLuTFL1alleles display a level of differentiation that is consistent with selection for an allele III in the north. We demonstrate through heterologous expression inArabidopsis thalianathatLuTFL1is a functional homolog ofTFL1inA.thalianacapable of changing both flowering time and plant architecture. We conclude that specialized fiber flax types could have formed as a consequence of a natural adaptation of cultivated flax to higher latitudes.