LUTHER BURBANK 



tion of the characteristics of the hybrid in its off- 

 spring, as shown by the Sunberry, is manifested in 

 the case of these familiar hybrid forms that spring 

 from the union of closely related species or 

 varieties. 



What the Sunberry Teaches 



All this should be borne in mind by anyone 

 who is prone to reduce the principles of heredity 

 to formulae of undue simplicity. 



The new formulae of the Mendelians, for ex- 

 ample, which have such admirable application to 

 many cases of the crossing of related forms — 

 where particular unit characters are segregated 

 and recombined — have no application, or to be 

 applied must be distorted from their original im- 

 plications, in dealing with such a case as that of 

 the Sunberry. 



Here there is no clear balancing of dominant 

 and recessive factors, with the overwhelming 

 presentation of the dominant factor in the first 

 generation and the reappearance of the recessive 

 factor, beautifully segregated, in the second. 



Instances of inheritance of that order we have 

 had presented again and again. We shall hear 

 of more of them before we are through. 



But, in the meantime, let us not forget the 

 lesson taught by the Sunberry — let us recognize 

 that there are conditions of hybridization under 



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