™'NDEX 659 
Goldschmidt, gypsy moth, 217, 575 Hall and Russel, experimental error, 430 
Lymantria, 216, 546, 558 Hallet, plant breeding, 437 
population, 260 selection, 366 
potency of a sex-factor, 217, 218 wheat, 289 
Goodale, ducks and fowls, 550 Hansen, N. Iv., alfalfa, 206 
Goodness of fit in Mendelian ratios, 100 apples, 297 
Goodspeed and Clausen, Nicotiana crosses, 238, pear blight, 407 
240 seed and plant introduction, 299 
reaction systems, 242 resistant fruits, 408, 411 
Goss, pea crosses, 294 Ilansen, Barber, Wolf and Jordan, mutations in 
Grading in animal breeding, 508, 583 bacteria, 27 
precautions in, 512 Ilarris, egg production, 507 
Graft components, 374, 378, 383 milk yield, 55 
hybrids, 374 ratios, testing goodness of fit, 102 
behavior, 382 seed production, 442 
historical cases, 37S soil heterogeneity, 430, 431 
tomato-nightshade, 374 Harris, O., cattle, 446 
infection, 381 Hartley, bud sport, 273 
-symbionts, modification of, 383 corn, 293 
Grafting and graft-hybrids, 374, 376 plant-to-row-strain, 433 
of insects, 382 selection, 335 
of ovaries in fowls, 487 somatic variations, 272 
in guinea-pigs, 485 Hayes, tobacco, 367, 368 
Grains, composite crossing of, 296 Hayes and Hast, factors, competitive action of, 
Grape chimeras, 381 150 
collections, 299 Hayes and Jones, cucumber crosses, 362 
Concord, 290 Hays, corn, 358 
earliest American hybridizers, 290 grain breeding, centgener method, 293 
heterosis in, 364 high protein, 359 
stocks, hybrid, 408 hybridization of plants, 294 
Grapes, immunity to phylloxera, 404 pedigree cultures, 419 
resistance to phylloxera, 402 pure lines, 339 
resistant stocks, 404, 408 selection, 366 
wine, effect of grafting, 383 , Hays and Boss, wheat inflorescence, 347 
Grasses, at Svalédf, 293 Headden, yellow berry in wheat, 418 
remnant system, 335 : Heape, sterility, 552 
Grassi, phylloxera, 405 Hedera helix, dimorphic leaves, 275 
Gregory, linkage in Chinese primrose, 125 Hedrick, apple breeding, 295 
Grew, sexuality, 437 Helianthus lenticularis coronatus, 270 
Grouse locust, Paratettix. Hemoglobin, stereoisomeric forms, 266 
s4 Hemp, 318 
heterosis in, 364 
Guignard, stock and scion, 3 
Guinea-pigs, agouti pattern, 
effects of alcohol on, 493 purple leaved, 270 
of castration in, 550 Henri, pear-quince hybrid, 378 
hybrid, 223, 235, 542 Henry, tree hybridization, 365 
inheritance of coat characters, 85 Herbert, Erica, 438 
Mendelian inheritance, 224 species crosses, 230, 438 
ovarian transplantation, 485 Herd books, a source of Mendelian data, 465 
polydactylous, 553 Shorthorn, 597 
Guthrie, fowls, 487 Hereditary material of domestic animals, 444 
Guyer, chromosomes in man, 538 Heredity, 1, 57, 439 
defects in man, 524 defined, 3 
sex in fowls, 539 problems of, 4 
Gynandromorphism, not due to mutation, 268 methods of attacking, 4 
Gypsy moth, intersexes, 217, 575 studies require funds, 609 
require time, 608 
H study of revolutionized, 439 
Heribert-Nilsson, G8nothera, 247 
Habit in sweet peas, 308 Heritability of variations, 15 
Hemophilia, 524 Hermaphrodites in Lychnis dioica, 213 
Hadley, white leghorn, 478 mutants, 215 
white Plymouth rock, 479 Heterogeneity in species, 250 
Hagedoorn, pure lines, 258 Heterosis, and partial sterility, 365 
Hall, experimental error, 430 explained, 232 
Digitized by Microsoft® 
