Journal of Heredity

DICKIE, MARGARET M.

doi: 10.1093/oxfordjournals.jhered.a106466pmid: N/A

Abstract Tortoise shell, a new mutant in the house mouse, occurred in the obese stock. It resembles the tortoise shell cat. Breeding data indicate the mutant is dominant and that it appears to be a sex-linked lethal since there is a deficiency of male offspring. To is suggested as the symbol for the character. This content is only available as a PDF. Author notes *Roscoe B. Jackson Memorial Laboratory, Bar Harbor, Maine. This work was supported by grants to the Jackson Memorial Laboratory from the Anna Fuller Fund, the Jane Coffins Childs Memorial Fund for Medical Research and the National Cancer Institute of the National Institutes of Health, Public Health Service © AMERICAN GENETIC ASSOCIATION

DERMEN, HAIG

doi: 10.1093/oxfordjournals.jhered.a106467pmid: N/A

Abstract Over a two-year period polyploidy was successfully induced by colchicine treatment in 10 varieties and selections of bunch grapes adapted to the northeastern United States, in one V. vinifera grape of California and in 16 muscadine grapes adapted to the southern United States. The technique and the identification of tetraploidy is described in detail. Chromosome doubling has insured fertility in some sterile hybrids in other species. Crosses will be attempted between tetraploids of bunch and muscadine grapes in the hope that fertile hybrids may result from these crosses. This content is only available as a PDF. Author notes *Cytologist,Horticultural Crops Research Branch, Agricultural Research ServiceBelts-ville, Maryland © AMERICAN GENETIC ASSOCIATION

SHACKELFORD, RICHARD, M.;MOORE, WILLIAM, D.

doi: 10.1093/oxfordjournals.jhered.a106468pmid: N/A

Abstract Six genotypes producing white pelage in the ranch mink acceptable for commercial use have been mentioned, and some of the reasons that none of them is presently considered an adequate basis for econimical production of white pelts ave been enumerated; a sevent, the albino-pastel (bb) white, will probably become a standard combination for production of white pelts in the future. The Hedlund white is presently one practical answer to the market requirements, and results from homozygosity for a mutant gene sympolized by h. Approximately 85 percent of the mink heterozygous for h can be distinguished from the wild type by increased' ventral white spotting which occasionally extends to the feet, tail, tip, and rarely to a blaze on the face. The observation that certain white individuals “mark” their non-self white offspring more conspicuously than others indicated by specific genetic modifiers. The behavior pattern of the Hedlung modifiers. The behavior pattern of the Hedlunde white differs in several respects from other mink, suggesting that it may be deaf. This content is only available as a PDF. Author notes *Genetics Department, University of Wisconsin and Agent, Bureau of Animal Industries, U. S. Department of Agriculture; and Genetics Department, University of Wisconsin © AMERICAN GENETIC ASSOCIATION

JOHNSTON, E., F.;BOGART,, RALPH;LINDQUIST, A., W.

doi: 10.1093/oxfordjournals.jhered.a106469pmid: N/A

Article PDF first page preview Close This content is only available as a PDF. Author notes *Approved for publication as technical paper 835 by the Director of Oregon Agricultural Experiment Station Contribution of the Department of Animal Husbandry, Oregon Agricul tural Experiment Station and the Bureau of Entomology and Plant Quarantine, Division of Insects Affecting Man and Animals, U. S. Department of Agriculture, Corvallis, Oregon © AMERICAN GENETIC ASSOCIATION

PICKENS, A. L.

doi: 10.1093/oxfordjournals.jhered.a106470pmid: N/A

Article PDF first page preview Close This content is only available as a PDF. © AMERICAN GENETIC ASSOCIATION

SHAKLEE, WILLIAM, E.;KNOX, C., W.

doi: 10.1093/oxfordjournals.jhered.a106471pmid: N/A

Abstract Pheasant males produced by crossing Mongolian pheasant males with Ringneck pheasant females were mated naturally and by artificial insemination with Dark Cornish and Silver Cornish females. Among 1,409 eggs, 3.48 percent exhibited development when incubated. The hatchability of these “fertile” eggs was 6.12 percent. One female and four male hy brids developed sufficiently to pip the shell. Two chicks died in the shell and both proved to be males. The remaining female and two male hybrids hatched and were raised to ma turity. The incubation period was 26 days. The behavior and general appearance was more pheasant-like than chicken-like. Body weight and tail feather length were intermediate between the parent species. The hybrids had none of the comb, wattle or earlobe char acteristics of the chicken parent. The ear tufts and velvety red feathered areas on the sides of the face of the pheasant sire were also absent. The shank color was slate like that of pheasants, and the spurs were intermediate in shape and location between the parent species. No sexual activity was observed and subsequent dissections showed infantile or degenerate gonads. This content is only available as a PDF. Author notes " *Animal and Poultry Husbandry Research Branch, Agricultural Research Service, United States Department of Agriculture,Beltsville, Maryland © AMERICAN GENETIC ASSOCIATION

BRUMBAUGH, ROBERT, S.

doi: 10.1093/oxfordjournals.jhered.a106472pmid: N/A

This content is only available as a PDF. Author notes *The author has summarized, in three earlier discussions in the JOURNAL OF HEREDITY, some of the relevant stages in early Greek genetic speculation (the pre-Platonic theories of the Pythagorean school [from 529 B.C.], and of Empedocles [fl. 440 B.C.], and a development in the Hippocratic school roughly contemporary with Plato). I wish to thank Mr. Henry M. Butzel, Jr., of Indiana University for his expert advice on terminology and matrices, and Professor Tracy Sonneborn, Indiana University, for his explanations of current genetic theories. Their suggestions have been indispensable to me in my attempts to trace and present the devel opment of genetic theory in the early Greek period, although responsibility for any errors remains my own. © AMERICAN GENETIC ASSOCIATION

SMYTH, J., ROBERT

doi: 10.1093/oxfordjournals.jhered.a106473pmid: N/A

Abstract A description has been given of an autosomal, recessive mutation in the turkey result ing inabnormal down and plumage. Normal feather webbing was absent in the adult mutant. Instead, the individual feathers appeared to have short thick hairs attached to the rachis. Since the down plumules were also extremely modified and gave the ap pearance of coarse hair, the name “hairy” is suggested for this condition. The “hairy” gene appeared to have no deleterious effects on embryonic development and hatchability, but under commercial growing conditions “hairy” turkeys showed a reduced viability. This content is only available as a PDF. Author notes *Massachusetts Agricultural Experiment Station, Amherst Contribution Number 924 © AMERICAN GENETIC ASSOCIATION