Fig. 3From: A Eurasia-wide polyploid species complex involving 6x Trifolium ambiguum, 2x T. occidentale and 4x T. repens produces interspecific hybrids with significance for clover breedingCrossing plan used to incorporate 6x T. ambiguum into the T. repens breeding pool. Abbreviations: ER embryo rescue, A, A4, O, O4 expected full (x = 8) or half T. ambiguum or T. occidentale sub-genomes, Pr, Pr4, Or, Or4 expected full or half ancestral T. pallescens and T. occidentale sub-genomes from T. repensBack to article page