98 



THE 



NATURALIST [You LIII 



pop and soft corn varieties in eighteen different crosses. 

 He was thus enabled to make observations on the inherit- 

 ance of characters other than those resulting in yield. 



Tn 18(S9 McCluer began his hybridization work with 

 corn, crossing a number of strains of dent maize, without 

 at first, however, making crosses between varieties of 

 different colors. Tn addition he utilized the following 

 characters in thii'teen crosses made in 1889. and in five 

 cross(>s made in 1Si)() obtained in the former year 36 and 

 in the latter year 158 ears. 



Sugary endosperm X starchy enilosperin. 



White endosperm X yellow endosperm and the reciprocal. 



Expressing these crosses in the following notation, 

 according to presence and absence, for convenience, with- 

 out regard to the actual gametic composition of the pa- 

 rents, which of course can only be inferred, we have: 



MrCIiici-'-^ ci-o^M.^ then .-i.-i^Hrv ar-cording to the for 

 mu!a> on tlic followinu' pngo. 



Leaving it understood that this is siniplv a classi- 

 fication in shorthand formulas, of the \ i-ilih' rliai-ndcrs, 

 without predicating their gametic com] M)>it ion. wliirii was 

 unknown to McCluer, since he far antcdarctl the days of 

 pure lines, Mendelism and fnctoria! analyses, we are 

 struck by the numlxT of faddrs witli which he experi- 

 mented, and with hi< ch'.ui (»li>civati()ns on the results. 

 Being a hoi-ticnltni-i-t. iic \v;i> h'd to h(> interested in these 

 various type- nf maize, to which ^Forrow and Gardner, 

 as agronomi>l>. gaxc no attention. 



