164 Plant-Breeding 



of the hybrids, therefore, as compared with the constants, 

 is 1.93 to 1. 



Experiment 2. Of 509 plants which were raised from 

 seeds whose albumen was of yellow color in the second 

 generation, 166 yielded exclusively yellow,while 353 yielded 

 yellow and green seeds, in the proportion of 3 to 1. There 

 resulted, therefore, a division into hybrid and constant 

 forms in the proportion of 2.13 to 1. 



For each separate trial in the following experiments, 

 100 plants were selected which displayed the dominant 

 character in the second generation, and in order to as- 

 certain the significance of this, ten seeds of each were 

 cultivated. 



Experiment 3. -- The offspring of 36 plants yielded 

 exclusively gray-brown- seed-coats, while of the off- 

 spring of 64 plants some had gray-brown and some 

 had white. 



Experiment 4. The offspring of 29 plants had only 

 inflated pods ; of the offspring of 71, on the other hand, 

 some had inflated and some had constricted. 



Experiment 5. The offspring of 40 plants had only 

 green pods ; of the offspring of 60 plants, some had green 

 and some yellow ones. 



Experiment 6. The offspring of 33 plants had only 

 axial flowers; of the offspring of 67, on the other hand, 

 some had axial and some terminal flowers. 



Experiment 7. The offspring of 28 plants inherited 

 the long axis, and those of the 72 plants some of the long 

 and some of the short axis. 



In each of these experiments a certain number of plants 

 came constant with the dominant character. For the 



