Synthetic cultivar

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1. An advanced generation of an open-pollinated population composed of a group of selected inbreds, clones, or hybrids.

syntheticcultivar.jpg

Diagram how a synthetic cultivar might be produced.
Source: Ohio State University Turfgrass Program

pencrossparents.jpg

'Penncross' creeping bentgrass is created from 3 parents shown here. Most seeded turfgrass cultivars are synthetic. In other words the seeds produce plants that are phenotypically similar but may vary slightly genotypically.
Source: Ohio State University Turfgrass Program