Table 1.

Experimental design of the investigated traits related to plant persistency

Population and trait	Trait name	Test field	Location	Season		No. of tested genotypes	No. of replications
				Transplanting	Investigation
272 × WF1680
S. trifoliorum resistance
Laboratory experiment (damage rate, %)	SRL	Laboratory	WFCRIa	–	2003	36	2
Field experiment (extent of plant disease, %)	SRR	Non-artificial	Moscow region	2001 May	2002 April	59	6
Fusarium resistance
Field experiment (intensity of disease development, %)	FRR	Non-artificial	Moscow region	2001 May	2002 April	59	6
Winter hardiness
Green part ratio of crown (%)	WHJ	Non-artificial	Sapporo	2001 July	2002 April	139	1
HR × R130
S. trifoliorum resistance
Field experiment (extent of plant disease, %)	SRR	Artificial	Moscow region	2004 July	2005 April	96	4–13
Field experiment (1: very sensitive; 9: very resistant)	SRJ	Non-artificial	Sapporo	2003 October	2005 April	177	5
Fusarium resistance
Field experiment (intensity of disease development, %)	FRR05	Artificial	Moscow region	2004 July	2005 April	96	4-13
Field experiment (intensity of disease development, %)	FRR07	Artificial	Moscow region	2006 June	2007 October	61	4–10
Winter hardiness
Survival rate after winter (%)	WHR	Artificial	Moscow region	2004 July	2005 Apr	96	1
Winter hardiness (1: very weak; 9: very hardy)	WHJ	Non-artificial	Sapporo	2003 October	2004 Apr	178	5

^aAll-Russian Williams Fodder Crop Research Institute