POTATO BREEDING AND SELECTION. 31 



the strong plants and a total gain of over 500 per cent. The graphic 

 chart shown in figure 1 illustrates quite clearly the marked differences 

 in vine and tuber production. It would be misleading to leave the 



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Green Mountain 





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Green Afounta/n \ , 



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Aforcross \ \, __ 



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~ Primes J- 5 f rang 



-Cults Z~Weak 



YVi. 1.— DiaKram .showing; the relative yipld.s bctwern strong 

 and weak iiihor-uiiit plaiit.s at lloncoyc Kails, N. Y., in liHl 

 and 1'J12. 



impression that these data r(q>rescnt tlic g>uns that are likely to 

 accrue through seh^ction. The lesson that these data should convey 

 is that tubers from weak, unproductive, or <liseased plants produce 

 oimilar or even worse progcMiy ami that the greatest benefit derived 



