Vallenback Pernilla, Bengtsson Bengt O, Ghatnekar Lena
Genetics, Department of Cell and Organism Biology, Lund University, Lund, Sweden.
Genetica. 2010 Mar;138(3):355-62. doi: 10.1007/s10709-009-9425-4.
A PCR based survey of Festuca ovina plants from populations around the southern part of the Baltic Sea demonstrates both geographic and molecular variation in the enzyme gene PgiC2, horizontally transferred from a Poa-species. Our results show that PgiC2-a natural functional nuclear transgene-is not a local ephemeral phenomenon but is present in a very large number of individuals. We find also that its frequency is geographically variable and that it appears in more than one molecular form. The chloroplast variation in the region does not indicate any distinct subdivision due to different colonization routes after the last glaciation. Our data illustrate the geographic and molecular variation that may occur in natural populations with a polymorphic, unfixed transgene affected by diverse kinds of mutational and evolutionary processes.
基于聚合酶链式反应（PCR）对波罗的海南部周边种群的羊茅植物进行的调查表明，从早熟禾属物种水平转移而来的酶基因PgiC2存在地理和分子变异。我们的结果表明，PgiC2——一种天然的功能性核转基因——并非局部短暂现象，而是存在于大量个体中。我们还发现其频率存在地理差异，并且呈现出不止一种分子形式。该地区叶绿体的变异并未表明由于末次冰期后不同的定殖路线而产生任何明显的细分。我们的数据说明了在受各种突变和进化过程影响的具有多态性、未固定转基因的自然种群中可能发生的地理和分子变异。
