Table I . --Cornparieon of western white pine Si trees and outcrossed trees (half-sibs of the S\'a) as to tree survival, timing and 

 extent of fruiting, attrition of female strobili, and seed production and weight 



Parent 

 (mother) 

 tree 



T/pe 

 of tree 



Different 

 hal f - s ib 



Trees 

 planted/ 

 trees sur- 



Age of 

 trees 

 in 



Avg. age 

 1st female 

 strobili 



Di f f erent 

 years female 

 St rob ill 



Avg. age 

 1st male 

 strobi 1 i 



Different 

 years male 

 Strobi 1 i 



Different trees 

 bearing strobili 



Total strobili^ 

 borne per avg. 

 tree all years 





number 

 '1) 



crossed^ 

 (2) 



1 ines 

 (3) 



viving^ 

 (4) 



1972 

 (5) 



borne 

 C6) 



borne 

 (7) 



borne 

 (8) 



borne 

 (9) 



Femal e 

 (10) 



: Male 

 : (11) 



Female 

 (12) 



: Male 

 : (13) 













Years 



Years 





Years 













1 



Si 



half-sih 



4 



2/1 

 14/12 



19 



18,20,21 



IS 

 10 





 3 



3 

 4 



10.2 





 5 



1 

 4 





 6 







2 







325 



15 



Si 



half-sjh 



8 



2/1 

 38/34 



18 



18-21 



16 

 10 





 2 



1 

 7 



18+ 

 16.6 





 6. 



1 



20 





 13 





 7 







550 



17 



Si 



half-sib 



6 



8/2 

 74/70 



18 

 18-21 



14 

 10 



5 

 9 



6 

 10 



16.6 

 17.6 



3 

 9 



2 

 42 



1 



37 







7 



585 

 2295 



18 



Si 



hal f-sib 



5 



1/0 

 22/21 



18-21 





















19 



Si 



half-sib 



33 



17/12 

 251/235 



21 

 18-21 



14 

 U 





 



8 

 13 



17.5 

 17.5 



3 

 9 



11 

 152 



2 



102 



2 

 8 



1 



1100 



20 



Si 



hal f-sib 



12 



1/1 

 69/65 



19 

 18-21 



19 

 11 





 



. 

 9 



19+ 

 18.3 





 9 





 39 





 26 





 6 







870 



21 



Si 



half-sib 



4 



4/3 

 45/43 



19 

 18-21 



13 

 U 



5 

 3 



5 

 10 



19.0 

 17.3 



1 

 9 



2 

 40 



1 

 31 



1 



15 



250 

 4830 



22 



Si 



half-sib 



8 



4/3 

 103/105 



21 



18,19,21 



15 

 11 



5 

 6 



5 

 12 



21 + 

 17.1 





 11 



2 

 78 







70 



1 

 12 







2400 



24 



Si 



half-sib 



1 



2/2 

 4/4 



18 

 18521 



11 

 12 



5 

 



4 

 4 



18 + 

 14 .3 





 5 



2 

 2 





 3 



1 



26 







2640 



25 



Si 



half-sib 



8 



7/6 

 42/41 



19 

 18-21 



10 

 11 



5 

 3 



9 

 8 



19.0 

 15.9 



1 



8 



6 

 33 



1 



21 



9 



14 



30 

 1045 



30 



Si 



half-sib 



4 



2/2 

 19/17 



19621 

 18521 



12 

 9 





 8 



2 

 5 



20+ 

 16.4 





 3 



1 



13 





 5 



1 



11 







230 



37 



Si 



half-sib 





3/0 

 23/23 



18521 





















39 



Si 



half-sib 





1/1 

 15/14 



21 

 18521 



10 

 10 





 6 







3 



18.0 

 18.7 



1 

 3 



1 

 7 



1 

 5 



13 

 4 



105 



390 



45 



Si 



half-sib 



2 



2/0 

 7/7 



18621 





















54 



Si 



hal f-sih 



12 



6/2 

 54/48 



20 

 18-2n 



12 

 11 







1 



5 



20+ 

 16.9 





 5 



1 



18 





 R 



1 



1 







185 



58 



Si 



half-sib 



19 



18/18 

 182/163 



21 



18,20,21 



13 

 11 



1 



4 



12 

 13 



18.7 

 17.0 



6 

 9 



15 

 114 



10 

 86 



in 



"45 

 3115 



59 



Si 



half-sib 



3 



3/1 

 17/14 



19 

 19520 



14 

 11 





 2 





16.0 

 17.8 



4 

 ? 



1 

 8 



1 

 8 







• 6 



2200 

 3480 



61 



Si 



half-sib 



7 ^ 



3/1 

 7/6 



18 

 18 



13 

 Q 





 



7, 

 2 







1 

 1 









63 



Si 



half-sib 



6 



ye 



54/48 



20 

 18-20 



15 

 11 



6 



? 



6 

 8 



20.0 

 17.9 



1 



8 



5 

 27 



1 



22 





 4 



3 



1305 



65 



Si 



half-sih 





5/4 

 19/1-7 



18 

 18-19 



12 

 10 





 5 



3 

 2 



18+ 

 15.5 





 2 



4 

 3 



n 

 4 









665 



69 



Si 



hal f-sib 



4 



10/6 

 10/in 



19 

 19 



14 

 10 





 5 



8 

 4 



13.0 

 19.0 



1 



5 



1 

 1 





 4 



1 



2 



70 



Si 



half-sih 



7 



4 



1/0 

 17/17 



18519 





















Totalsfl 



Si 



half-sib 



158 



in9/-'2 

 1096/1014 



348 

 347 



246 

 195 



1- 



85 

 121 



338.2+ 

 305.8 



21 

 106 



61/72 

 604/946 



18/72 

 446/946 



36 



137 



3920 

 25427 



Pai rs 







22 



18 



18 





18 



17 



17 



18 



1" 



16 



17 



Means 



Si 



half-sib 



^eraent surviva 

 66.0 

 92.5 



19.3 

 19.3 



13 

 10 



8 



4.7 

 6.7 



19.9 

 18.0 



1.2 

 6.2 



84 . 7% 

 63.8% 



25.0% 

 47. 1% 



2.2 

 8.6 



230.6 



1495. ■: 



Mean 



di f fcrence 





-26. 5° ** 



0. n 



*2 



9** 



-2.0* 



+ 1.9* 



-5.0** 



*20.9% 



** -22.1% 



* -6.4* 



* -1265.1 





'Sj's aie trees of the first selfed generation from the specified mother trees; half-sibs are either control -pol 1 inated , full-sib 

 trees or wind-pollinated "half-sib" trees of the same mother tree, from a given number of different sib lines; all are half-sibs of the 

 S) trees. 



^Planted trees e.xcluded those dying from blister rust before fruiting; surviving trees include those alive in 1972, plus those 

 fruiting prior to death. 



^lixcept on trees being bred for special purposes (Sj's, a few full-sibs, etc.), arboretum-wide observations on female fruiting were 

 discontinued once it became general (after 1966). Observations on male fruiting, however, are complete through 19''2. Thus total female 

 strobili per average tree are compared only through 1966, total male strobili through 1972. 



'*The five developmental stages correspond to (1) buds small to large (scales not open, prior to or at time of pollination bagging), 

 (2) maximum receptivity (pollination time), (3) strobilus scales closed (time of pollination bag removal), (4) strobili persistent to 

 second year (time of cone insect bagging), and (5) mature cones (time of cone collection). 



^The + symbol indicates that the or sib lines had not produced strobili through 1972. For purposes of comparing pairs of values, 

 these lines were treated as though they all produced strobili in 1973 (i.e., 18+ = 19, 19+ = 20, etc.). 



^Dashes in blank cell indicate that phenomenon occurred but was not observed. 



8 



