THE PLANT. 73 



year. Thus the remnants of the ear that has shown its supe- 

 riority should be planted the second year of the experiment in an 

 isolated place. This seed should be planted in rows which alter- 

 nate with those to be crossed on them. 



The rows of corn from the remnants of ears first selected are 

 to be detasseled. In this way parentage may be controlled in the 

 second generation. 



Experiments. 

 CORN. 



1. Cross varieties of uniform color. Plant these rows in an isolated 

 place. Detassel one row and' pollinate the detasseled row from the row 

 bearing tassels. 



2. Cross a variety having a white endosperm with a variety having 

 a yellow endosperm. Note results. 



3. Cross white corn with yellow. What will be the immediate result 

 in color? Plant some of this seed in an isolated place the next year and 

 note colors. 



4. Cross sweet corn with dent corn. Cross popcorn with sweet corn. 



5. Plant some pod corn by itself and note different results. There 

 will be stalks bearing kernels in the tassel, and ears with kernels each 

 covered with husks and ears without husks surrounding each kernel. 



5. Plant dent corn and sweet corn in alternate rows. Detassel the 

 sweet corn and pollinate it from the dent corn. Examine the ear of sweet 

 corn when it is mature. Is the cob or stalk of sweet corn effected? 



6. Plant some crossed or hybrid kernels of dent or sweet corn. 

 Note the kinds of ears resulting. What is the ratio of dent corn grains to 

 sweet corn grains? 



1. Study composition of kernel and breed for high-protein, low- 

 protein, high-oil and low-oil content. 



Questions. 



1. Can experiments in plant breeding be carried on successfully on 

 the home farm? 



2. Which gives the best results self-fertilization or cross-fertili- 

 sation? 



3. Will continuous self-fertilization reduce the yield? 



4. How does hybridization effect growth? 



5. Is there any fixed relation between type and yield? 



6. What is Mendel's Law ? 



7. What is the ear-to-row method? 



8. What are the advantages of using remnants of best ears for 

 foundation stock? 



