r- 



The Journal of Heredity 



FINE-STRIPED MAIZE LEAVES 



They differ from the fine-streaked leaves shown in figure 22 in having the light streaks prin- 

 cipally near the margins of the leaves. Crosses of this type with the fine streaked corn gave 

 normal green plants in the first generation. (Fig. 22.) 



about 100 plants, all normal green, 

 whereas the white seeds gave a large 

 number of fine-streaks. From similar 

 backcrosses made later, 253 normal 

 green plants were grown from yellow 

 seeds, no fine streaks being obtained. 

 The character "fine-streak" seems to be 

 dependent upon a factor closely linked 

 with the factor pair Y y for yellow vs. 

 white endosperm. The failure to obtain 

 more than about 50 percent of fine- 

 streaks from the white seeds of the 

 backcross may be due to a second factor 

 neces.sary for fine-streak (jr may be due 

 to the difficulty of distinguishing the 

 fine-streak character from normal green. 



Fine-streaked plants are charac- 

 terized by narrow light streaks on the 

 leaf blades. Usually only a few faint 

 streaks are to be found, but occasion- 

 ally plants are found with prominently 

 streaked leaves (Fig. 21). There is 

 some resemblance to the lineate leaved 

 type described by Collins and Kemp- 

 ton,- but the light streaks are much 

 fewer, coarser, and irregularly placed. 

 It differs from Lindstrotn's'* fine-striped 

 type (Fig. 22) in having the light 

 streaks scattered throughout the leaves 

 instead of being largely concentrated 

 near the margins. Crosses of fine- 

 streaked with fine-striped gave normal 

 green Fi plants. 



- Collins, G. N. and Kempton, J. H. Heritable Characters of Maize: Lineate Leaves. Jour. 

 Heredity U: 3-6, 1920. 



•■* Lindstrom, V . W. Chlorophyll Inheritance in Maize. Cornell Univ. Agr. Exp. Sta. Memoir 

 13: 1-68, 191S. 



