Substitution is likely to have taken place during the hybridization process such that two of the Leymus mollis chromosomes were replaced by two of the wheat chromosomes. The wheat parent is probably a tetraploid with 2n = 4x = 28 and AB genome.
Mögulegt er að tveir Leymus mollis litningar skiptist út fyrir tvo hveitilitninga í tegundablöndunarferlinu og hveitiforeldrið sé því ferlitna með 2n = 4x = 28 og AB genamengi.