674 



INDEX 



Variations, classification of, 15 



autogenetic, 20 



combinations, 15 



continuous, 18 



differences between them, 18 



direction, 20 



discontinuous, 18, 274 



ecological, 18 



ectogenetic, 20 



fluctuating, 18, 32 



fortuitous, 20 



heritability, 15 



homeotic, 16 



meristic, 16 



minus and plus in hooded rats, 188 



modifications, 15 



morphological, 16, 17 



mutations, 15 



nature, 16, 317 



orthogenetic, 20 



physiological, 16, 18 



psychological, 17 

 Variegated, Abutilons, 382 



geranium, 381 



maize, 272, 381 



Mirabilis, 273, 381 



plants not mosaics, 273 

 sporting of, 272, 381 



snapdragon, 381 

 Variegation, association with mutation, 272 



factor mutations, 381 



in Malvaceee, 381 



pathological, 381 

 Varieties, disease resistance in, 416 



factors in, 219 . 



importance of keeping pure, 341 



in plants, 302 



methods of creating, 302 



origin of, in Boston fern, 312 

 of sweet pea, 303 



running our, 340, 395 



standardization of, 432 



value of proved sorts, 341 

 Variety testing, experimental errors, 429 

 standards for, 435 



stations, 416 



tests, 427. 



Vavilov, rust resistant wheat, 412 

 Vegetative, in Boston fern, 312, 316 



mutation vs. somatic segregation, 272 



mutations, 270 

 Verbascum, 438 



blattaria X V. lychnitis, 230 



lychnitis X V. thapsus, 230 



Vestigial wings, inheritance of, in Droeophila, 87 

 Viala and Ravaz, grape phylloxera, 403 

 Vigor in Fi hybrids, 230, 326 

 de Vilmorin, Andre 1 , carrots, 290 



mass selection, 292 

 le Vilmorin, Louis, pedigree culture, 419 



linkage in peas, 125 



plant breeding, 299, 437 



progeny test, 293 



seed establishment, 290 



de Vilmorin, selection, 366 



sugar beet, 291 



wheat, 257, 258, 291, 419 



Vilmorin method of plant breeding, the, 291, 293 

 Vine, see Grape. 

 Violet, bud selection, 391 



bud sports in, 398 



dimorphic flowers, 275 



species and varieties, 302 



Vitis, cinerea, testivalis, linsecomii, candicans, 

 rotundifolia, californica, rupestris, 

 riparia, cordifolia, and verlanderi, 404 



vinifera, 403 

 de Vries, Alhambra plum, 298 



"Die M utationstheorie," 282 



discovery, 439 



evolution theory, 276 



mutants, 279 

 classified, 282 



mutation theory, 3, 7, 371 



mutations, 283, 286 

 discovery of, 276 



(Enothera crosses, 229, 244 



CEnothera lamarckiana, 277 



CE. Isevifolia, 278 



on Le Couteur, 289 



on Shirreff, 289 



pangens, 246, 247 



progressive species, 281 



rediscovery of Mendel's principles, 68 



somatic variations, 272 



species hybridization, 244 



W 



Wagner, immunity to rust, 413 

 vonWahl, mare mule and foal, 518 

 Walnut, heterosis in, 364 



oak-like, 265 



Paradox, 364 



Royal, 297, 364 

 Warner, egg production, 507 

 Wasps destroy paper bags, 344 

 Watermelon, 317 



wilt resistant hybrid, 414 

 Waugh, on grape hybridizers, 290 

 Webber, citrus, 297 



clonal or bud selection, 391 



corn, 293 



cotton, 292 



tuber-unit, 395 

 Weismann, acquired characters, 480, 484 



amphimixis, 3, 484 



body and strip, 489 

 Wellington, tomato, 362, 363 

 Wentworth, color in horses, 466, 467, 468 

 Westgate, alfalfa, 296 

 Wheat, 317 



autogomaous, 257 



breeding begun, 289 



centgener method, 293 



crossed with rye, 229, 236 



Defiance, 336 



duplicate factors discovered in, 137 



