A position effect inOenothera
In an X-ray induced interchange ofOenothera blandina, the capacity of the genePs for pigmenting the flower buds is reduced. One of the chromosome breaks is in arm 3 of chromosome 3.4, close to the locus ofPs. When the translocatedPs gene is transferred to normalblandina by crossing-over it reçovers its normal activity. This is the first experimental demonstration of a position effect in plants.
Volume 100, 2021
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