654 



INDEX 



Correlation, between economic characters, 442 



between mothers and daughters, 457, 458 



classified, 65 



coefficient of, 52, 430, 458 



in plot yields, 430 



table, 49, 51 



interpretation of, 50, 52 

 method of tallying, 50 

 Correns, Bryonia alba, 212 



effects of crossing, 360 



Mirabilis, variegated, 273 



rediscovery of Mendel's principles, 68* 



starchiness in corn, 79 



somatic variation, 272 

 Cotton, 317 



collecting stock seed, 341 



dimorphic branches and leaves, 275 



hybridization, 294 



leaf factor, 178, 179 



local adjustment of varieties, 441 



mass selection in, 292 



natural crossing in, 318 



pedigree breeding, 294 



plant-to-row tests, 433 



wilt-resistant selectipns, 417 

 Coupling factor, 104, 126 

 Cowpea, wilt immune variety, 416 

 Crampton, grafted insects, 382 

 Cratsegus-Mespilus graft-hybrids, 378, 379 



monogyna, 378 

 Creating a gray breed of horses, 470 



new varieties, methods of, 302 



populations at Svalof, 352 



rust-resistant wheat, 411 

 Creation of bantam varieties of fowls, 500 



characters, 342 



disease-resistant plants, 400 



varieties of the rose, 310 



wilt-resistant watermelons, 414 

 Cretinism, 526 



Crop plants, breeding begun, 288 

 improved, 440, 441 



earlier breeders of, 289 



species and varieties, 302 

 Cross-breeding for rust-resistant wheat, 411 



livestock, 514, 584 

 Crossing, composite, 296 



effect on plant populations, 321 



immediate effect of, 360 



results of promiscuous, 343 

 Crossing-over, 108, 109 



and non-disjunction, 202, 204 



and prepotency, 576 



between twelve sex-linked factors, 121, 123 



double, 119 



ior white, miniature and bar in Drosophila, 

 118-120 



in male Drosophila, no, 114, 209 



in male rat, 576 



In sex-heterozygote, no, 209 



in silk-worm, 210 



mode of interchange in, 121, 123 



percentage between loci, an indication of 

 distance between factors, 117 



Crossing-over, triple, 121, 123 



Cross-over combinations of factors, 108, 119 



gametes, 119 

 Cucumber, 317 



increased yield in Fi, 362 

 Cuenot, multiple allelomorphism, 155 

 Culley, inbreeding, 581 

 Cumulative factors, 140 

 Cuvier, fertility, 438 

 Cydonia-Pyrus graft-hybrid, 378 

 Cytisus Adami, 378, 382 



-Laburnum graft-hybrid, 378 



purpureus, 378 , 

 Cytological investigations in insects, 210 



studies in CEnothera, 285 

 Cytology, method of, in genetic research, 8 



I) 



Dahlia chimeras, 381 



species and varieties, 302 

 Dairy cows, comparison of records, 455 



marvellous records of, 454 



obtaining records, 592 



Tilly Alcartra, 594, 597 

 Daniel, stock and scion, 383, 384 

 Daniel and Delpon, graft-hybrid, 378 

 Daniel and Elder, stock and scion, 384 

 Darbishire, dominance, 145 



pea crosses, 294 

 Darwin, aberrant individuals, 276 



acquired characters, 6, 480 



adaptation, 438, 439 



Ancon sheep, 462 



"Animals and Plants under Domestication, 1 

 276, 453 



cattle, 471 



dimorphism, 275 



evolution theory, 5 



fertility, 552 



hyacinth, 287 



mule, 517 



natural selection, 14, 276 



on Shirreff (cereals), 289 



"Origin of Species," 276, 437 



plant improvement, 287 



quagga, 556 



reversion in pigeons, 171 



selection, 250 



sexual selection, 215 



theory of pangens, 489 



use and disuse, 491 



variations transmitted, 6 



variety crosses, 231 



vigor, 553 



zebra-ass hybrid, 520 

 Darwinian theory of evolution, 439 



fertility, 552 



selection, 495 

 Date palm, 318 



artificial pollination, 287 

 Dates, research on, 300 

 Datura, 438 



vigor in species hybrids, 230 



