Table 1 — Means, range, and analyses of variance of symptoms of infection among prove- 

 nances of ponderosa pine 39 months after artificial inoculation with rust 



Analysis of variance 



wy lll^MVIll Ul lfllC%*IIVII 





nanuc 



df 



MS 



c 

 ■ 



PR>F 







Warrant - - 



Nrt 



IfU. 



r &I l«c/ 11 







Infoftirvn /trooc uuith nallc\ 

 IMIc;OllUII ^Ucco Willi ydllo/ 





o o o 



1 OA 







n nnm 



RGsistant (treGS without galls) 



72 



37-97 



124 



1 .102 



2.04 



.0001 



ci tcvn or ioc r\f rocictanro - 

 \s a Ltry Ul 1 tr Ul ^ coiola! lUc 















No galls or bark reactions 2 



38 



8-76 



124 



M 10 



1.42 



.0106 



Bark reactions only 2 



52 



13-89 



124 



1 .093 



1.30 



.0446 



Gall death 2 



10 



0-36 



124 



3 .008 



1.35 



.0230 



Trees with galls or bark 















reactions 



72 



28-93 



124 



1 .102 



1.51 



.0035 



Rate of gall appearance 4 



35 



0-78 



124 



1 .291 



1.11 



.2438 



Rust-killed trees 5 



8 



0-44 



124 



3 .012 



1.00 



.4955 



Transformed to arcsin V x . 



Percentage resistance category is of total resistance. 



Transformed to V x + 0.5. 



4 Rate of appearance determined by number of galls 3 months after inoculation/by number galls 39 

 months after inoculation. 

 'Data from galled trees only. 



BRITISH COLUMBIA 



Figure 2 — Level of infection of populations of ponderosa pine to gall 

 rust. Numbers represent actual percentage of trees with galls for each 

 population. 



3 



