E. R. Saunders 



165 



Expectation in the case of fnatings of semi-incana with incana and with the 

 various ylabrotbs and sub-glabrous forms. 



Expectation in f 2 from self-fertilisation 



Expectation 

 in/". 



Hoary 



Other Sub- 

 Sub- Glabrous 

 Half- Mid- Quarter- Glabrous and 

 Hoary Hoary Hoary CHH Glabrous 



(c) (Half-Hoary x Hoary) x Half-Hoary 

 18. (CRHiKxCRHK) 

 X CRHiK 



from a back cross! 



All Hoary 



(d) (Half-Hoary x Sub-Glabrous or Glabrous) x Half-Hoary 



19. 



20. 



21. 



(CRHiKxCRH) I 

 X CRHiK \ 



(CRHiKxRHiK) , 

 X CRH^K i 



(CRHiKxCR) 

 X CRHiK 



All Hoary 



All Half-Hoary 



All Sub-Glabrous 



— all 



— 1 



1 — — 



1 — 



* Indicates those matings in regard to which a restatement of the expectation is 

 necessitated for the reason given above. 



+ By a printer's error this (the last) mating in the earlier prediction is given as i^Hx CR 

 instead of Jff x CK. 



5: As the results have been shown above for every factorial combination in the case of 

 self- fertilisation, the calculation for a back cross is easily made. It is therefore unnecessary 

 to set oat the ratios in every case and four instances only are here given in illustration of 

 this type of breeding. 



