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Table 1 Parentage of 10 verified hybrids between 6x T. ambiguum and 2x T. occidentale

From: A Eurasia-wide polyploid species complex involving 6x Trifolium ambiguum, 2x T. occidentale and 4x T. repens produces interspecific hybrids with significance for clover breeding

Hybrid number

6x T. ambiguum female

2x T. occidentale male

Further investigation

5

Endura-13

48–17

Plant & progeny described

26

Endura-13

48–17

Died

29

Endura-16

44–16

Not studied

31

Endura-10

49–11

Flowered, seeds obtained

33

Endura-12

44–16

Plant & progeny described

34

Endura-18

48–17

Flowered, seeds obtained

36

Endura-13

48–17

Lost

51

Endura-10

49–11

Very large leaved and vigorous. Chromosome preparations confirmed 2n = 32. Not further studied.

140

Endura-13

59–16

Plant described, no seeds obtained

229

Endura-16

44–19

Flowered, progeny grown