462 Subject Index 



Polyploids, animal {co)i tin tied) 

 chicken, 58 

 Drosophila. 58 

 frogs, 58, 381 

 pigs, 59, 381,382 

 rabbits, 59, 381,382 

 silk^vorms, 58 

 Triton, 58 

 Triturus, 58, 97 

 Xenopus. 58 

 Polyploids, plant 



agricultural species, 279 

 Brassica, 309-10 

 Cucurbita, 311-12 

 forage species, 321-23 

 forest species, 323-26 

 fruits. 323-26, 333 

 Galeopsis, 310 

 Gossypium, 302-6 

 Gramineae, 301-2 

 Xicntiana. 307-9 

 Ribes. 312 

 Solanuin, 310-11 

 Trifolium, 312 

 vegetables, 323-26 

 watermelon, 327-31 

 Polyploidy, criteria for judging, 362- 

 appearance. 363 

 bv fruit, 363 



microscopic differences, 369 

 seed, 364 



\veight of grain, 366 

 Pohploidv breeding, principles of 

 achantages \'s. disachantages, 285 

 genome transfer, 285 

 large populations, 283 

 la\v of optimal numbers. 283 

 mixoploids. 285 

 raw polyploids. 282 

 testing methods, 286 

 of traiisfer, 284, 293 

 Polyploidy experimentation 

 callus tissue, 274 

 chemical induction, 274 

 colchicine method, 274-75 

 heat-shock, 274 

 history of, 333-34 

 scope of research, 286-88 

 Polysaccharides, action on tumors, 261 

 Polys toma. 119, 125 

 "Precocious reversion," 73, 93 

 Pregnancy, 229, 230, 236 

 Premeiotic stages, 112 

 Pressor amines, of the adrenals. 397 

 Pressure, of air, action on mitoses, 225 

 Pretreatment, 386 

 Primula keii'cnsis, 278-79 

 Progesterone, 226, 235 

 Proiactine, 226, 228, 379 



injected with colchicine, 379 

 Prolactine-thickened crop-sac, 379 

 Proliferating cells, 385 



Propagula, 1 18 



Prophase, 31-35, 114, 380; see also 

 Mitosis 

 arrested, 64 



influence of colchicine, 31-33 

 Piophase reversal, 50 

 N-Propvlcolchicairiide, 411 

 Prostate, 226, 227, 232 



ventral, 22() 

 Protein content, 368 

 Protoanemomin, 413, 415 

 Protonema, 118 

 Protopin, 413 

 Protozoa. 54, 125 



anatomical variation, 126 

 gross changes, 129 

 microinjection, 125 

 role of toxicity and temperature, 125 

 Psainnicchimis miliaris, 89, 91 

 birefringence, 91 



independence of spindle and mon- 

 aster, 89 

 monaster expansion, 89 

 viscosity changes, 89 

 Pseudoanaphase, 45, 393 

 Pseudometaphase ,393 

 Pseudonuclei in Tubifex eggs, 54 

 Pseudospindle, 79, 84, 85, 193, 394 



achromatic sphere, 84, 85 

 Psilocybe scinilanceolata, 123 

 Psychriste, 12 

 Purdue University, 331 

 Purine metabolism, 397 

 Pycnosis, 52, 178, 190, 203, 376 

 Pyrophosphatase, 261, 397 



P-Ouinoue, 118 



Rabbit, 191, 381, 382: see also Polyploids, 



animal 

 Racemized colchinol methyl ether, 163 

 Radiomimetic action, 15, 171 

 Radiominictic drugs, 392. 415 

 Radiosensiti\ity, 266 

 Radish 



gigas, 324 



Japanese, 324 



resistance to disease, 32 1 



simimer \ariety, 324 

 Rana, 210, species of: a<rilis. 203-4; jusca. 

 210; pipiens, egg of, 191, 202: teni- 

 poraria, 245 

 Range species. 321 

 Raphanobrassica. 279-80, 309 



amphiploid, 309 



cabbage x ladish, 309 



first made in 1826, 309 



Karpechenko demonstrated fertile, 309 

 Raphanus satimts, 309 



