Table 6. --Cone and seed yields following crossings on Si trees from comparatively 

 self -sterile and self- fertile parents 3 western white pine 





Crossing success 



Original 

 parent 

 number 



s,'s ; 



Si 

 full- 



sibs 



\ Si : 

 : back- : 

 : crosses 



Single : 

 crosses : 



Half- 

 sib 

 out- 

 crosses 



: Total 









CROSSES ATTEMPTED 







19 



1 



1 



10 



9 



2 



23 



25 







11 



14 



2 



27 



58 



6 



19 



17 



CROSSES YIELDING 



9 



MATURE CONES 



1 



52 



19 











5 



1 







6 



25 



-- 



-- 



7 



9 



2 



18 



58 



6 



16 



11 



CROSSES YIELDING 



8 



FILLED SEED 







41 



19 



-- 



-- 











-- 







25 



-- 



-- 



6 



9 



2 



17 



58 



5 



11 



11 



7 





34 









FILLED SEED PER CONE, AVERAGE 







19 







0.0 



0.0 







25 







34 .4 



37.3 



32.5 





58 



3.3 



9.1 



10.1 



5.3 







15 



