INDEX 



667 



Parental forma, recovery of in Ft, 170, 180, 184, 



186, 242 

 Partial linkage, 100 



Bterility in hybrids, 235, 230, 238 

 Pathogene, fire-blight, 407 

 Pathogenic fungi and bacteria, 401 

 Patten, apple breeding, 295 



resistant fruits, 408 



Pattern, face, in Hereford cattle, 454, 474, 534 

 Pea, 317, 440 



Marrowfat, 290 



sweet, 303 

 Peach-almond graft-hybrid, 378 



and almond, grafting, 383 



breeding, 297 

 Pear breeding begun, 288, 295 



chimeras, 381 



Chinese resistant to fire-blight, 408 



discontinuous variation in !.< Conte, 274 



fire-blight resistance, 407 



-quince graft-hybrid, 378 



resistant hybrids, 407, 411 

 Pearl, alcoholized fowls, 493 



biometry, 6 



coefficient of inbreeding, 598 

 of relationship, 601 



curve of inbreeding, 600 



directions for poultry breeding, 590 



egg production, 209, 456, 464, 578, 588, 58U, 



607 

 index, 593 



fecundity in fowls, 559, 560, 501, 562, 563, 

 674 



fowls, 476, 497, 499, 500 



genotypic selection, 585 



labeling system, 423, 424 



milk record, 455 



natural phenomena, causes of, 208 



potency, 575 



prepotency, 576 



problem of inheritance, 4 



Redfield's theory, 483 



selection indices, 502, 503 



sex-ratio, 544 



statistical knowledge, 55 

 Pearl and Bartlett, characters of the corn grain, 



333 



Pearl and Parshley, sex-ratio, 543, 544 

 Pearl and Surface, bean and oat breeding, 318 



fowl, 209 



monthly egg production, 505, 506 



selection index numbers, 334, 504 



trap nest, 592 



winter egg production, 457 

 Pearson, biometry, 5 



prepotency, 576 



saturation, 571 



tables for statisticians, 102 



variability index, 53 

 Peas, at Svalof, 293 



crossing in, 318 



Mendel's investigations with, 77 



pure lines in, 340 



tall and dwarf crossed, 68, 174 



Pedigree culture, 6, 419 

 in cotton, 20ft 

 methods, 410 

 system of, 293 

 method, in Coleus, 390 

 breeding, 580 

 "Pedigreed" nursery stock, 304 



trees, 304 



Pedigrees, ancient, 444 

 of fowls, 588, 589 

 livestock, 596 



Pelargonium sonale, chimera, 379 

 Pentstemon, vegetative vigor in species hybrids, 



230 



Peony collections, 299 

 Performance records of fruits, 391 

 Periolinal chimera, 375, 376, 380 

 Petunia nyctaginiflora X P. phoenicea, 230 

 Phaseolus vulgaris nana, 250 

 Pheasant hybrids, 521, 558 

 Phenotype, 72 



Phenotypes in dihybrid Ft, 82 

 Phenotypic ratio, in a cross involving a sex- 

 linked lethal factor, 133 

 in dihybrid, 82 



in Ft with n pairs of factors, 98 

 in Ft of purple starchy X white waxy 



maize, 106 

 in Ft of purple wavy X white starchy 



maize, 108 

 i n Ft of yellow red 9 X gray white cf in 



Drosopbila, 113 

 in Ft of yellow white 9 X gray red <f in 



Drosophila, 112 

 in Ft of dihybrid, 85 

 in monohybrid, 71 

 in tetrahybrid, 94 

 in trihybrid 93 

 selection, 577 

 in fowls, 498 

 limitations of, 578, 579 

 Phlseum pratense, see Timothy. 

 Phylloxera, "benignant" and "malignant" races, 



405 



carysecaulis, 211 

 resistance dominant, 408 

 factors, 409 

 nature of, 404 

 vastatrix, 402 

 Phylloxeran, grape, 402 



hickory, 211 

 Phylogeny and chromosomes, 264 



of the chromosomes, 264 

 Physiological, behavior of graft-hybrids, 382 

 characters of corn grain, 333 

 variations, 16, 18 

 Phytomeres, modifications of, 385 



selected, 386 

 Pierson, Boston fern, 312 

 Pig, see Swine. 

 Pigeons, reversion in, 171 



sex-determination in, 545 

 sex-linked characters, 209, 539 

 Pigmentation, and egg production in fowls, 506 



