Res.(ncter.).8 



TABLE 1 



Some breeding mate r ial used in Holland and Britain 



and derived from resistant material 



found by Ellenby . 



Lines of S. andigenum containing resistors 

 (Holland and Britain) 



HI 

 H2 

 H3 

 Hii 



C.P.C. I692 selfed. Cochabamba, Cereado Bolivia 



C.P.C. 1690 selfed. Puno, Puno, Peru 



C.P.C. 1685 selfed. Juli, Puno, Peru 



C.P.C. 1673 selfed. La Paz, Bolivia 



C.P.C. 1595 selfed. Uroro, Bolivia 



Susceptible S. andigenum 

 (Britain) 



HI3 



C.P.C. 1787 

 C.P.C. 1U70 



Lines of S. vernii (= S. ballsii ) 

 (Britain) 



D3 



C.P.C. = 2U87) 



) S. vernii selfed 

 C.P.C. = 2U88) ~ 



S. stenotomum x S. vernii Fo 



C.P.C. = Commonwealth Potato Collection 



