Heredity Studies in the Morning-Glory 



13 



TABLE 2. Whites Selfed Which Threw Colors 



Plants iog-5-10 and 132-2-1 were doubtless tinged whites that were 

 recorded as true whites. They had sibs that were recognized as tinged 

 whites. Plant 108-5-1 could give a dark blue because it was hetero- 

 zygous for both the genes C and R (CcRrBBXX). If more progeny had 

 been obtained from it one would have expected also magentas, mauves, 

 pinks, and whites. Plants 109-2-7 and 1 09-5- 10, if of the constitution 

 CCRr, could throw pinks, tinged whites, and whites when selfed. 



Plants 152-3 and 152-6 were two white sibs among the Fi progeny 

 of a cross between a light blue and a white. The other sibs were four 

 light blues. Their pedigree affords an interesting example of the release 

 of hidden factors thru mendelian recombination. It is given in table 3, 

 with the putative formulas of the parents : 



TABLE 3. Pedigree No. 152 



Pi 



1 8-8-1 light blue 



CCRRBB 



X 

 CcRRBB 



21-5-2 white 



(KS: 



Plant 

 no. 



9 



129 



Fi 



Color 



Light blue. . \ 



Light blue. 



White. 



Light blue . . 



Light blue. . 

 White 



Actual number 



6 dark blue 

 12 light blue 

 5 tinged white 

 4 white 



1 light blue 

 4 white 



2 dark blue 

 9 light blue 

 2 pink 



I tinged white 

 9 white 



I pink 



I tinged white 



I white 



