Table 1.

Genotypes and origins of clover species used in these experiments

Species	Subspecies	Subgenus*	Chromosome number*	Ploidy	Origin	Growth habit	Reference
T. subterraneum ‘Campeda’	subterraneum	Trichocephalum	2n = 16	Diploid	Sardinia	Annual	Italy ISpICF, 2000
T. subterraneum ‘Clare’	brachycalycinum	Trichocephalum	2n = 16	Diploid	Mediterranean	Annual	Gladstones and Collins, 1983
T. purpureum ‘Paratta’		Trichocephalum	2n = 14	Aneuploid	Greece	Annual	Anon, 1972
T. polymorphum (acc. # 087102)		Involucrarium	2n = 16,32	Polyploid	Uruguay	Perennial	Labandera and Vincent, 1975

* Ellison et al. (2006).