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This gene is especially interesting in Arabidopsis as mutations only cause the semi-dwarfism and have no further negative effects on the performance of the plants
They apparently can compensate for all of the effects of the loss except for the semi-dwarfism.
Koornneef and his colleagues have identified six different genetic causes for the semi-dwarfism. These include mutations that the prevent the growth factor from being formed with the correct size mutations that replace especially important amino acids with useless ones as well as mutations that prevent the proper splicing of MESSENGER RNA prior to the protein biosynthesis
Moreover Koornneef and his colleagues were able to show that Arabidopsis only rarely displays semi-dwarfism in the wild.
Koornneef's investigations also prove that semi-dwarfism has arisen independently in every location. The semi-dwarf Arabidopsis plants always had different genetic backgrounds explains the geneticist
The DNA sequence shows that a few plants attempted to rid themselves of the semi-dwarfism again.
and to verify that ABCB1 is in fact the gene that controls dwarfism. After Devos and Parvathaneni located the dwarfing gene they tested pearl millet dwarfs from around the world.
Their short stature is caused not by a single genetic mutation as occurs in many forms of dwarfism
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