326 



INDEX 



Ray, species, first use of term, 9 

 Replication, value of, 58 



correct method of, 60 



reducing probable error by, 59 

 Rice, important characters of, 108 



inheritance summary, 109 



natural crosses, 37 



origin, 108 

 Rimpau, barley pollination, 36 



oat crosses, 36 



Riolle, radish inheritance, 249 

 Roberts, on early plant breeders, 



5-8 



Roguing, seed plots, 180 . 

 Riimker, von, xenia in rye, 106 



inheritance in rye, 106 

 Russell and Morrison, natural 



crosses, soybean, 39 

 Rye, pollination, 39, 106 



winter vs. spring, 106 



xenia in, 106 



S 



Salaman, potato inheritance, 221 

 Salmon, blooming in wheat, 69 

 Sargaret, cucurbits, classification, 

 254 



cucurbits, crosses in, 7 

 Saunders, Marquis wheat, 136 



wheat crosses, 36 

 Scott, evolution, 8 

 Seed, improved corn, 287 



pure bred, 281 



registered, 286, 293 



what is good, 282 



wilt resistant flax, 287 

 Selection, individual plant, 119, 128 



in small grains, early workers, 

 118, 119 



isolation of pure lines, 125 



methods of, 114, 115 



sorghum, sugar content, 179 

 Self-fertilization, in normally cross- 

 fertilized species, 45, 205 

 Setchell, tobacco sections, 159 

 Sexuality, Camerarius proves fact, 3 



further proof of, 4 

 Shamel, tobacco breeding, 165 



Shamel and Cobey, tobacco breed- 

 ing, 166 

 Shamel and others, bud selection in 



fruits, 274 



Shaw, self-fertilization in beet, 250 

 Shaw and Norton, inheritance in 



beans, 242 



Shirreff, early selections, 118 

 Shull, self-fertilization in maize, 202, 



205 



Smith, selection for chemical con- 

 tent, maize, 193 

 Sorghum, breeding, 179 

 classification, 178 

 inheritance in, 178 

 origin of, 178 



self-fertilization in, 38, 180 

 Soybeans, breeding, 148 

 characters of, 146 

 inheritance in, 147 

 natural crosses, 39 

 origin of, 146 



Species, crosses, Fi, tobacco, 45 

 crosses, willow, 8 

 first use of term, 9 

 Spillman, cowpea inheritance, 143, 



144 



wheat, density of spike, 81 

 Spragg, M. A. C. Robust bean, 



131 

 Spragg and Clark, Red Rock wheat, 



128 



Squash, breeding, 259 

 flower structure, 255 

 size inheritance, 258 

 Stakman and others, biologic forms 



of rust, 85 



flax wilt resistance, 157 

 Stewart, bud selection in fruits, 275 



tobacco breeding, 166 

 Stout, bud variations, 274, 276 

 Stuart, potato breeding, 223, 224, 



226 



Surface, oat inheritance, 92, 93 

 oat selections, 129 

 oat species crosses, 90, 94 

 Sutton, Brassica crosses, 251 

 self-sterility, fruits, 269 

 Swingle, citrus fruits, 277 





