Punasel ristikul on kaks sorditüüpi: diploidne ja tetraploidne. Tetraploidse punase ristiku haljasmassisaak on diploidsega võrreldes oluliselt suurem, kuna on kasvult võimsam.
Hybridization of a diploid wheat with Aegilops speltoides (a closely allied species of grass), followed by doubling of the chromosome complement, produced tetraploid wheats.
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