Table 4.— Results of analyses of variance of freezing tests 

 presented as intraclass correlations, the ratio of a 

 variance component to tfie sum of all components 



Source of 

 variance 



Intraclass 

 correlation 



Blocks 



Temperatures 

 Populations 



Populations x temperatures 

 ResiduaP 



0.06* 

 .21** 

 .05** 







.68 



'Statistical significance of tfie F-value at the 5 percent level. 

 "Statistical significance of thie F-value at tfie 1 percent level. 

 ^Composed of tfie interactions involving blocks. 



Table 5.— Coefficients of determination (R^) for regression analyses relating genetic 

 variation to geograptiic and physiographic variables 



Variable 



Elevational model 



Linear 



Quadratic 



Geographic 

 model 



Combined 

 model 



Grow/th and development 



Late growth 0.26* 



Leaf length .32* 



Height .70* 



Adjusted height (2,200 ft) .50* 



Frost injury .21 * 



Periodicity of shoot elongation 



Duration .71* 



Rate .74* 



Cessation .70* 



Elongation .78* 



Cold hardiness 



Injury .13* 



0.27* 

 .32* 

 .70* 

 .53* 

 .22 



.74* 

 .74* 

 .74* 

 .79* 



.13* 



0.04 

 .26* 

 .24* 

 .31*' 







.31*' 

 .09 

 .29* 

 .19 



.33*' 



0.49* 

 .78* 

 .66* 



.83* 

 .80* 



.43* 



'Statistical significance at the 5 percent level of probability. 

 "Statistical significance at the 1 percent level of probability. 



Figure 3.— Population means for four variables 



plotted by elevation of ttie seed source. Symbols ' ' ' ' ' ' ' ' ' ' 1 ' 1 — 



code geographic origins: • = Upper Snake River '^oo asoo 5900 7200 8500 

 Basin; O = Lower Snake River, ■ = Wasatcfi 



Mountains, ▲ = Deadline Ridge. elevation of seed source, in 



5 



