Ploidy is a key trait for the identification of Phacelia tanacetifolia varieties, where the standard diploid set is 2n = 22.
In the reference
7
varieties
crop Lacy phacelia,
where this is mentioned in the description.
For lacy phacelia (Phacelia tanacetifolia Benth.), two main ploidy states have been established. Most existing varieties are diploid and are characterized by the presence of 22 chromosomes in the diploid set. Tetraploid forms also occur in breeding practice, which are officially considered in the description and identification of varieties according to UPOV guidelines.
Changes in ploidy are used in breeding as a tool for targeted influence on plant morphological parameters. Tetraploid forms are generally distinguished by increased cell size, which may be reflected in plant height, seed weight, and total biomass productivity. The selection of a variety based on this trait is primarily necessary for verifying varietal identity during cultivation.
General information about the subject — on the page
Ploidy.
Varieties of Lacy phacelia mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.