Fig. 2-4. It has been proposed that 6x tall fescue (bottom left) arose via hybridization between 4x tall fescue (top center) and L. pratense (a diploid like the L. perenne pictured top left), followed by a chromosome doubling event.

Fig. 2-4. It has been proposed that 6x tall fescue (bottom left) arose via hybridization between 4x tall fescue (top center) and L. pratense (a diploid like the L. perenne pictured top left), followed by a chromosome doubling event. 

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Tall Fescue Monograph