Table 9 . --Analysis of fourth year height growth of seedlings in the natural selection 



study 



Source 



: d.f. 



: S.S. 



: M.S. 



F : 



Variance 

 component 



: Percentage 

 : of total 

 : variance 



Block 



2 



622 



311 





0.09 



0.005 



Stand 



9 



3260 



362 



7.9*1 



.35 



.02 



Elevation 

 Stand (Elev) 



Block*Stand 



Tree (Stand) 



Block* 



Tree (Stand) 



18 



487 



969 



Within family 7054 



825 

 15468 



14727 

 108648 



1728 

 1538 



1722 

 192 



46 

 32 



15 

 15 



9.0* 

 4.2** 



2.r 



.11 



.95 



.00 

 15.40 



24 

 ,11 



.014 

 .006 



.006 

 .06 



.00 

 .91 



l * and ** indicate significance at the 5 percent or 1 percent level, respectively. 



Factorial mating design study . --Seedlings from crosses among mid-elevation (1,000- 

 1,250 m) trees grew the most between ages 8 and 11 and were tallest at age 12 (table 10), 

 As a group they differed significantly from both the low- and high-elevation families in 

 growth and from the high-elevation families in height (table 11). The low- and high- 

 elevation means did not differ significantly. 



Approximately 90 percent of the total variability was associated with differences 

 among seedlings within families and environmental effects. Of the remainder, 67 percent 

 of the variability in growth and 80 percent of the variability in height was associated 

 with differences among families within elevation zones and only 33 percent or 20 percent 

 associated with differences among elevation zones. 



Although the mid-elevation group was tallest as a whole, the tallest family was 

 from the low-elevation group. The low group also had a higher ratio of better families 

 than either the mid- or high-elevation groups (1/5 vs. 1/8 and 1/36 families in the top 

 10 percent, respectively). 



Table 10 . --Growth and height of seedlings in the factorial mating design study 



Elevational : Growth between : Height 



zone^ : ages 9 and 11 \ age 12 



--------- Centimeters ------ 



Low 44 101 



Mid 48 106 



High 45 99 



^Low = below 1,000 m, mid = 1,000 to 1,250 m, high = above 1,250 m. 



14 



