INDEX 651 
Bison americanus, 533 
americanus < Bos taurus, 236, 520, 533, 542 
disease immune, 529 
Bittersweet, graftage of, 374 
Bizarria, 378 
Blair, truck crops, 441 
Blake, bud selection, 398 
Blakeslee, egg production, 507 
Blakeslee and Warner, poultry studies, 507 
Blastogenic characters, 480 
Blending inheritance recognized by Castle, 189 
Blood eye color in Drosophila, 156 
Blount, grain rust, 411 
hybridization of plants, 294 
Blue Andalusian fowls, 152 
Bolley, flax, 417 
Bos taurus hybrids, 236 
sterility of, 557 
Boshnakian, Boston fern, 313, 314 
Nephrolepsis, 316 
Boston fern, dwarfing, 315 
increase in leaf division, 315 
in ruffling, 315 
origin of varieties in, 312, 391 
progressive mutations in, 315 
Boyd, polled Herefords, 463 
Brassica campestris, 19 
Breeder, animal, equipment of, 450 
Breeders, beliefs of, 564 
Breeding, and chromosome numbers, 342 
animal and plant compared, 447 
art of, 447 
conservative and constructive, 440 
codperative, 606 
defined, 11 
disease-resistant plants, 295, 400 
for immunity, 529 
from the best, 493 
genetic investigations needed, 610 
investigations, 591 
maize, 325 
methods and selection, 500 
of crop plants begun, 288 
operations, planning, 440 
other knowledge needed, 611 
pedigree, 580 
plant, 287, 291, 299 
practical genetics and, 449 
problems of animal, 447 
projects, 440 
systems, 580 
value and modifiability, 456 
wheat, 336 
Breeds, dual purpose, 515 
knowledge of, 451 
utilization of older, 448 
Brentana, Phasianide, 521 
Bridges, chromosomes, sex, 555 
crossing-over dependent on age, 120 
‘‘deficiency,’’ 121, 155 
eosin eye color, modifiers, 192 
interference and linkage, 124 
lethal factor, 546 
multiple allelomorphs in eye color, 161 
Bridges, non-disjunction, 198-205 
sterility in Drosophila, 234 
Briem, sugar beet, 340 
‘Broadbreeding’’ advocated, 334 
begun in Germery, 292 
Bryonia, sex-inheritance, 196 
Bryonia dioica, sex-inheritance, 212 
Bryophyllum calycinum, hormones, 276 
Bud mutations, 385 
in Boston fern, 315, 386 
in cherry, 383 
in citrus, 392 
in roses, 311 
long known, 366 
progressive and digressive, 315 
selection, 298, 385, 386 
effective in Coleus, 390 
in apples, 393 
in citrus, 391 
in horticulture, 391 
in potato, 394 
limitations of, 398 
sports, 270 
cause, 273 
in apple, 393 
in orange, 386 
in potato, 394 
occurrence, 272, 311, 386 
variations, 298, 385, 391 
Budd, seed and plant introduction, 299 
Buder, Crategomespili, 379 
graft-hybrids, 374, 377 
graft-hybrids list, 378 
reciprocal grafting, 382 
Buds, adventitious and chimeras, 374 
Buff eye color in Drosophila, 156 
Bull, Concord grape, 290 
plant breeding, 437 
tree fruits, 297 
Bumble bees, crossing beans, 318 
Burbank, composite hybridization, 298 
species crossing, 297 
walnuts, 364, 365 
Bursa bursa-pastoris * B. heegeri, 137 
duplicate factors in, 136 
Butter fat production in mother and daughters, 
458 
records compared, 455 
Cc 
Cabbage, disease-resistant strains, 418 
Cacao, dimorphic branches, 275 
Calycine flower in Nicotiana, 218 
Canadian Seed Growers’ Association, 301 
Cannabis sativa, 270 
Cantaloupe, 317 
disease-resistant, 415 
Carbohydrates, specificity of, 266 
Carleton, experimental error, 430 
grain rust, 413 
Marquis wheat, 294 
small grains, 296 
Digitized by Microsoft® 
