Journal of Heredity

GUENET, J., -L.;MARCHAL,, G.;MILON,, G.;TAMBOURIN,, P.;WENDLING,, F.

doi: 10.1093/oxfordjournals.jhered.a109202pmid: 469229

Abstract Recognition of a new allele (Wf) at the W locus of the mouse is based on genetic analysis and demonstration of defective hair pigmentation, macrocytic anemia, and defects in pluripotent hemopoietic stem cells. Unlike other alleles of the W series, this one does not result in sterility. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

RESSLAR, P., M.;GREGORY, W., C.

doi: 10.1093/oxfordjournals.jhered.a109180pmid: N/A

Abstract Metaphase I of pollen mother cells of Arachis villosa Bentham, A. cardenasii Krap. et Greg. nom. nud., A. duranensis Krap. et Greg. nom. nud., and their hybrids were studied. The most frequent association found was 10 bivalents. Cells with 9 bivalents and 2 univalents were noted, but the frequency of this association was below 9 percent in all cases. It is concluded that these three species have a common genome. The designation of this genome as the A genome is proposed. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

LOUKAS,, M.;KRIMBAS, C., B.;MAVRAGANI-TSIPIDOU,, P.;KASTRITSIS, c., D.

doi: 10.1093/oxfordjournals.jhered.a109181pmid: 112146

Abstract Genetic information on 25 enzyme polymorphisms in Drosophila subobscura, the location of corresponding genes, and cytological and genetic maps of the chromosomes are presented, as well as photographic maps of the salivary gland chromosomes in the third instar larva and white-case early pupal stages. Biochemical markers were used to establish chromosomal homologies among D. subobscura, D. pseudoobscura, D. melanogaster, and D. willistoni. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

ANDERSON, RUTH, S.;BURNS, ROBERT, P.

doi: 10.1093/oxfordjournals.jhered.a109183pmid: 469220

Abstract Cataract-webbed (cw) in the deer mouse (Peromyscus maniculatus) is a recessive mutant that is manifested by syndactyly (involving soft tissues) and eye defects including cataract. Within cw/cw mice, the age at which cataract first appears is genetically controlled. Evidence for the activity of genetic modifiers is the early appearance of cataracts in the offspring of parents that developed cataracts at early ages. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

LAMOREUX, M., LYNN;RUSSELL, ELIZABETH, S.

doi: 10.1093/oxfordjournals.jhered.a109184pmid: 469221

Abstract Demonstration that the pigmentation-restricting actions associated with mutant alleles at six different genetic loci in the mouse cannot all be identical comes from measurements of white-spotted areas of the pelages of highly congenic yellow-and-white vs. black-and-white mice. The effects on pigmentation restriction were very similar for yellow mice of two distinct mutant genotypes (A v/a and e/e), even though it is known that the yellow-producing action of Av occurs in the hair follicle, while that of e/e is intrinsic to the melanocyte. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

NEMETH, STEPHEN, T.;TRACEY, MARTIN, L.

doi: 10.1093/oxfordjournals.jhered.a109185pmid: 469222

Abstract A total of twenty-six allozyme loci were assayed in six crayfish species. Estimated mean heterozygosity was low (5.5 percent) for all species in comparison with the invertebrate average. The specific values, however, ranged from 2.9 percent to 8.3 percent. These crayfish estimates are consistent with estimates for other decapods where low heterozygosity is the rule. The consistency of low heterozygosity estimates in the order Decapoda suggests that its explanation may include both order specific differences such as low mutation or intracistronic recombination rates and species specific differences. A dendrogram, constructed using Nei's D, is in agreement with the morphological clustering. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

MCGIBBON, W., H.

doi: 10.1093/oxfordjournals.jhered.a109186pmid: 469223

Abstract A mutation of recent origin in Cornell randombred Leghorn chickens causes the shanks to be colored green due to melanin-like deposition in the dermis, in contrast to normal yellow. Some pigment is often present in the mandibles and the mature feathers display an ashen cast. This mutant is determined by an allele, idc, on the sex chromosome. Excessive adult mortality with a high incidence of tumors, mainly hemangiomas, is associated with this gene-at least extending over a two-generation observation interval. Pullets receiving this mutant allele (idc) from their sire die at 2 to 3 times the rate of sisters, with yellow shanks, that carry the Id allele. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION

BERARDINO, DINO, DI;ARRIGHI, FRANCES, E.;KIEFFER, NAT, M.

doi: 10.1093/oxfordjournals.jhered.a109187pmid: 89140

Abstract Silver-staining of nucleolar organizer regions (NORs) in somatic cells of Holstein cattle (Bos taurus) and European buffalo Murrah type (Bubalus bubalus) indicates that the NORs are located in the telomeres of chromosomes 2,3,4,11, and 29 of cattle and chromosomes 3,4,6,23, and 24 of buffalo. Chromosome identification was by Q-banding. Analysis of 326 metaphase cells showed a mean value of 7.7 ± 1.2 for Ag-NORs with a range between 4 and 10 for cattle. In all of the cells examined, either one or both homologues of chromosome 29 showed telomeric silver staining for cattle. Meiotic preparations showed not more than 5 clusters of silver grains in the pachytene stage of cattle. This content is only available as a PDF. © 1979 AMERICAN GENETIC ASSOCIATION