650 
Antirrhinum, majus * molle, 220 
majus, 90, 133 
species hybrids, 227, 235 
Antitoxins in plants, 408 
Aphis maidiradicis, maidis, 410 
-resistance in stone fruits, 409 
in teosinte, 410 
Apple, Baldwin, 393 
Ben Davis, 394 
breeding, 295, 297 
bud selection, 393 
sports in, 393 
chimeras, 381 
collections, 299 
hybridization, 311 
uniformity, 393 
yield, 393 
Aquilegia hybridized, 438 
multiple allelomorphs in, 160 
Arctia caja, 492 
Arenander, mutation in cattle, 464 
Arnold, apple breeding, 295 
Art of breeding, 447 
Artificial insemination, 552 
Asparagus, 318 
alkali resistance, 401 
heterosis in, 364 
Ass, chromosome number in, 519 
hybrids, 516 
Autogamous organisms, 16 
Autogenetic variations, 20 
Autosomes, 58, 65 
Ayrshire breed, 454 
B 
Babcock and Lloyd, somatic segregation, 275 
Back-cross, 73 
Bacteria contain chromatin, 264 
Bags for hybridization, 344 
Bailey, L. H., bud mutation, 366 
selection, 298 
seed and plant introduction, 299 
“Survival of the Unlike,’’ 288 
Bailey and Wyman, sweet pea, 305 
Bakewell, animal breeder, 500, 581 
Banana, dimorphic branches, 275 
Barber, genetic theory, 27 
Bar eye in Drosophila, 149, 202 
Barley, 317 
autogamous, 257 
little natural crossing, 318 
mutations in, 369 
pure lines, 293, 340 
winter-resistant, 340 
Barrenness in Duchess cows, 556 
Bartlett, Ginothera investigations, 283 
Bateson, comb types in fowls, 164 
complementary factors, 140 
contabescence, 234 
earwig, 48 
fowl, sex-linkage, 209 
genetics, meaning of, 1 
linkage in peas, 125 
INDEX 
Bateson, multiple recessive factors, 140 
presence and absence hypothesis, 153 
polled cattle, 463 
somatic segregation, 274 
sweet pea, 306, 308 
Bateson and Punnett, Sheep, 549 
Baur, Antirrhinum, 147, 220, 223, 227, 235 
chimeras, 378, 379, 380 
factors, manifold effects of, 133 
linkage in snap dragon, 125 
natural chimera, 378 
Primula experiments, 26 
Solanum Darwinianum, 377 
snap dragon trihybrid, 90 
stock and scion, 383, 384 
variation classified, 15, 263 
variegation, 381 
Beach and Maney, aphis-resistant plums, 297 
hybrid fruits, 409 
Beal, sweet peas, 304, 306, 307, 310 
Bean, 317 
Bush Lima, origin, 177 
Florida Velvet, valuable mutations 
367 
multiple allelomorphs in, 160 
mutations in, 367 
Princess, 250, 318 
Beans, crossing in, 318 
effect of grafting, 384 
pure lines in, 340 
tall and dwarf, 174, 175 
Becker, Boston fern, 312 
Bees, bumble, cross beans, 318 
Beets, alkali resistance, 401 
remnant system, 335 
Behavior of graft-hybrids, 382 
Beliefs of practical breeders, 564) 
Bell, marking individuals, 602 
Benedict, Boston fern, 312 
bud mutations, 315 
Berckman's peach, 297 
Bermuda grass, clonal selection of, 298 
Berries, hybrid, 297 
Berthollet, species hybrids, 230 
Bibos frontalis X Bos tauru 
gaurus Bos taurus, 
grunniens X Bos taurus, 23 
sondaicus * Bos indicus, 236 
Biffin, Puccinia glumarum, 411, 412 
wheat, rust-resistant, 294, 295 
Biologic strains of fungi, 415 
Biology and acquired characters, 480 
subdivisions of, 4 
Biometrical school, 32, 439 
study, requirements of, 36 
terms, ¢ 
Biometry, 5, 6, 32 
Biotypes in maize, 326 
in mixed populations, 260 
Birds, hybrid, 521, 543 
sex-determination in, 539 
sex-linked inheritance, 209 
song in male, ete., 214 
sterility in hybrid, 558 
37 
Digitized by Microsoft® 
