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Table 3. The relationship between autumn growth rate, plant development and vernalizationresponse. sensitivity to day length. frost resistance, 1985-1986.Character1985Vernalizationresponse1986CoeHicients of correlationDay lengthFrostsensitivityresistance1985 1986 1985 1986Growth rateAutumn tillenngDry weightDevelopment rateVernalization responseDay length sensitivity0.170.65"0.48"1.00-0.020.250.51"-0.06-0.54"1.00-0.150.05 -0.34 0.18 -0.160.13 0.27 0.78" 066"-0.07 -0.42' -0.67" -0.49'-0 11 -0.68"-0.02 -0.15 0.65" 0.59"1.00 1.00 0.07 002. Significant at 005 probability level.. Significant at 001 probability levelTable 4. Relationship between spring growth rate, plant development and sensitivity to daylength. vernalization response, grain yield under commercial planting, 1986-1987.CoeHicients of correlationVernalizationDay lengthresponse sensitivity Grain yieldCharacter 1986 1987 1986 1987 1987Growth rate -0,26 -0.09 -0,62" 0.08 0.30Dry weight (10 plants) -0,44" -0.36 ·0,49" -0,09 0.34Dry weight (10 stems) -0.54" -0,34 -0,56 -0,05 0,41'Intensity of development -0,39' -0.51" 0.68"Table 5. Possible combinations of day length sensitivity and vernalization responce in F5·F7 linesderiving from winter x spring crosses, 1987-1989.Parent orcrossNumber oflinesResponse today length vernalizationFrequencyof lines, %Odesskaya 16ChalkaCIANO 79Veery#5Odesskaya 16/CIANO 79Odesskaya 16Neery#5ChaikaiCIANO 79ChaikaIVeery#5315476386479highhighlowlowhighlowhighlowhighlowhighlowhighlowhighlowhighlowhighlowlowmediumlowlowhighhighlowlowhighhighlowlowhighhighlowlowhighhighlowlow10.480.955.4083.1717.861.687.3573.11oo7.4192.59o12.587.522