EXPERIMENTS IN BREEDING SWEET CORN. 



2«I 



1908. This may be taken to indicate the results of the first step 

 in the process of weeding out undesirable lines (genotypes) in 

 regard to ear characters. 



The superior quality of the seed ears planted in 1909 over 

 those in 1908 is brought out by the photographs of typical ears 

 shown in Figs. 228-230, especially by comparison with Figs. 

 224-227. 



In Fig. 228 the ears are so arranged on the plate that the rate 

 of yield of the progeny of each ear in bushels per acre increases 

 as we pass from the ear on the extreme left (No. 602) to the 

 ear on the extreme right (No. 600). The first three ears at 

 the left (Nos. 602, 586 and 609) gave rise to rows which yielded 

 poorly. The other two ears (Nos. 592 and 600) produced high 

 yielding rows. The data regarding each of the ears in Fig. 

 228, and their progeny are given in Table 6. 



TabeE 6. 

 Data Regarding the Progeny of the Bars Shozvn in Figure 228. 



6 



u 



Weight of 

 shelled corn 

 in grams. 



Planted 



row No. 



Bushels 

 per acre. 



Parent 

 row No. 



Bushels 

 per acre of 

 parent row. 



Parent 

 Ear No. 



602 



110.5 



541 



34.43 



165 



25.77 



1 



586 



126.0 



525 



39.98 



138 



37.76 



164 



609 



110.0 



526 



41.80 



193 



31.62 



115 



592 



103.0 



521 



56.85 



147 



39.12 



129 



600 



109.0 



536 



59.02 



158 



40.62 



137 



Similar data for the ears of Fig. 229 are given in Table 7, 

 and for those of Fig. 230 in Table 8. 



Table 7. 



Data Regarding the Progeny of the Bars Shown in Figure 220. 



6 



Weight of 



shelled corn 



in grains 



Planted 

 row No. 



Bushels Parent 

 per acre row No. 



Bushels per 



acre of 

 parent row 



Parent 

 ear No. 



448 

 574 



576 

 577 

 578 



106.0 

 104.0 

 K)<).o 

 11."., 

 110.0 



532 

 531 

 534 

 524 

 533 



42.74 

 45.79 

 43.67 

 43.67 

 49.18 



131 

 113 

 113 

 113 

 117 



37.76 

 37.38 

 37.38 

 37.38 

 33.50 



193 

 50 

 50 

 50 



