MONOHYBF.ID SEGREGATION IN MALVA SPECIES 



47 



All plants with leaves of oxyloba- (and Fr) type had also sepals of the 

 same type, and all plants of parviflora-iyym had sepals of this type. 

 The difference was so great that there was no difficulty at all to 

 decide to which of these types a i)lant heloiigcd. The distinguishing 

 of the o.rr//o/>a-honiozygotes, on the contrary, could not be made with 

 certainty. The variation in F^ as regards the o.r,i//o/K/-characters 



TABLE 2. The F;rgener<dion of the cross M. oxyloba X parviflora. 



formed a continous series of transitions between the extremes. The 

 main cause may be that the modification of the oxy/oba-characters is 

 relatively large compared with the paryi/Zora-characters. Neither the 

 extreme plants of the pure line of M. oxyloba could with certainty 

 be distinguished from the hybrid. 



Table 1 shows the variation in Fo. The segregation is a typical 

 monohybrid one. The theoretical and the observed values agree very 

 well, and the result of the reciprocal crosses is the same. Thus, 



