XIV 



CONTENTS 



ductions into the Pacific coast region, 159; Ladoga 

 wheat, 160 ; Chul wheat, 161 ; Fretes wheat, 162 ; Black 

 winter emmer, 163; Swedish select oats, 164; Kherson 

 oat, 165 ; Sixty-day oat, 166 ; Other oat introductions, 

 167 ; Manchuria barley, 168 ; Tests and distribution, 

 169 ; Hanna barley, 170 ; Swan Neck barley, 171 ; 

 Hannchen barley, 172 ; Smyrna White barley, 173 ; 

 Beldi and Telli barleys, 174 ; Abruzzes rye, 175. 



CHAPTER VIII 



CEREAL IMPROVEMENT SELECTION ..... 

 Sorting, 176 ; Roguing, 177 ; Cleaning and grading, 

 178 ; Air movement, 179 ; The gravity method, 180 ; 

 Specific gravity method, 181 ; Heavy and light seed, 

 182 ; Large and small seed, 183 ; Experiments in New 

 South Wales, 184 ; Many factors influencing seed tests, 

 185 ; Mass selection, 186 ; Schlanstedt rye, 187 ; Useful- 

 ness of mass selection, 188 ; Mass selection at Svalof, 

 189 ; Maintaining the purity of varieties, 190 ; The seed 

 plat, 191 ; Pure line selection, 192 ; Work of Le Couteur, 

 193; Work of Shirreff, 194; Work of Hallett, 195; 

 Work of Hays at Minnesota Experiment Station, 196 ; 

 Minnesota selections, 197 ; Work of Nilsson at Svalof, 

 198 ; Views of De Vries and Johannsen, 199 ; Immuta- 

 bility of pure lines, 200 ; Examples of the fixity of pure 

 lines, 201 ; Centgener method in pure line breeding, 202 ; 

 The plant-row method, 203 ; Specific results of selection, 

 204 ; Work of Von Rlimker with rye, 205 ; Selection of 

 cereals for disease resistance, 206 ; Fultz wheat, 207 ; 

 White Clawson, 208 ; Gold Coin wheat, 209 ; Other 

 American selections, 210 ; Pure line selections at Svalof, 

 211 ; European rye selection, 212 ; Australian selected 

 wheats, 213. 



CHAPTER IX 



CEREAL IMPROVEMENT HYBRIDIZATION .... 

 Need of hybridization, 214 ; Manner of natural pollina- 

 tion, 216 ; Pollination of rye, 216 ; Mendel's law of hy- 

 bridization, 217 ; Explanation of the theory, 218 ; Verbal 



206-230 



