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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic evidence for early flax domestication with capsular dehiscence
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Genetic evidence for early flax domestication with capsular dehiscence

机译：荚膜裂开早期亚麻驯化的遗传学证据

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Flax (Linum usitatissimum L.) is the earliest oil and fibre crop, but little is known about its domestication process. Attempt was made here to assess genetic relationships of 63 Linum accessions representing seven typical groups of cultivated flax and its wild progenitor, pale flax (Linum bienne Mill.), by using 49 informative expressed sequence tag-derived simple sequence repeat (EST-SSR) primer pairs. The seven groups were pale flax from Turkey, pale flax from other countries, and five groups of cultivated flax (landrace, fibre, oil, winter, and dehiscent). From these 63 samples, 366 polymorphic bands were detected, which likely represented 79 loci. These polymorphic bands had frequencies that ranged from 0.016 to 0.984 and averaged 0.284. Group-specific EST-SSR variation (Fst values) ranged from 0.339 to 0.373 and averaged 0.349 and pairwise group EST-SSR variation ranged from 0.067 to 0.507. A neighbor-joining clustering of these seven groups revealed that dehiscent flax clustered most closely to its wild progenitor, pale flax, followed by oil flax and fibre flax. Winter flax clustered most closely to oil flax and less to pale flax. These clustering patterns were essentially the same when individual samples were analyzed via neighbor-joining. These findings strongly suggest that capsular dehiscence was among the first flax traits modified by human after initial domestication, reflecting the importance that reducing capsular dehiscence likely played in early flax domestication.
机译：亚麻（Linum usitatissimum L.）是最早的油料和纤维作物，但对其驯化过程知之甚少。在此尝试通过使用49个信息性表达序列标签衍生的简单序列重复序列（EST-SSR）来评估代表7个典型的栽培亚麻及其野生祖先苍白亚麻（Linum bienne Mill。）的63种亚麻属种的遗传关系。引物对。这七组分别是来自土耳其的淡亚麻，来自其他国家的淡亚麻，以及五组耕种的亚麻（长白，纤维，石油，冬季和开裂）。从这63个样本中，检测到366个多态性条带，可能代表了79个基因座。这些多态带的频率范围为0.016至0.984，平均为0.284。特定组的EST-SSR变化（Fst值）在0.339至0.373之间，平均为0.349，而成对的EST-SSR变化在0.067至0.507之间。这七个群体的邻国聚簇表明，裂开亚麻最靠近其野生祖先，淡亚麻，然后是油亚麻和纤维亚麻。冬季亚麻与油类亚麻的聚集最紧密，而较浅的亚麻则较少。通过相邻连接分析单个样本时，这些聚类模式基本相同。这些发现强烈表明荚膜开裂是最初驯化后人类修饰的首批亚麻特征之一，反映出减少荚膜开裂可能在早期亚麻驯化中发挥的重要性。

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