abstract：:An association was found earlier between the Ep(1) gene locus coding for an endopeptidase and the endosperm color gene Y(1) on chromosome 6 of Zea mays. By employing primary trisomics we have unequivocally placed the Ep(1) gene on chromosome 6, closely linked to the Y(1) locus. Additionally we describe new alleles at ...

journal_title：Genetics

authors： Nielsen G,Scandalios JG

更新日期：1974-08-01 00:00:00

abstract：:Mutants resistant to selenomethionine were isolated, and their properties studied. Mapping studies indicate that the mutation sites are located near the eth-1(r) locus in linkage group I, about ten map units away from the mating type locus. The sites of new mutation are either allelic to or very close to eth-1(r). The...

journal_title：Genetics

authors： Chen GS,Metzenberg RL

更新日期：1974-08-01 00:00:00

abstract：:The Standard and Sex Ratio gene arrangements of the X chromosome of D. pseudobscura differ from each other in allele frequencies at the four X chromosome loci, esterase-5, adult acid phosphatase-6, phosphoglucomutase-1 and octanol dehydrogenase-3. The Standard arrangement which is the common arrangement in all populat...

journal_title：Genetics

authors： Prakash S

更新日期：1974-08-01 00:00:00

abstract：:A model emphasizing the possible genetic role of tandem duplications of reverse repeats has been developed as an extension of Crick's (1971) general model for the chromosomes of higher organisms. Although developed initially (1) to explain why random differences in the control regions of individual gene loci might con...

journal_title：Genetics

authors： Wallace B,Kass TL

更新日期：1974-07-01 00:00:00

abstract：:Salmonella typhimurium can normally use glycine as a serine source to support the growth of serine auxotrophs. This reaction was presumed to occur by the reversible activity of the enzyme, serine transhydroxymethylase (E. C. 2. 1. 2. 1; L-serine: tetrahydrofolic-5, 10 transhydroxymethylase), which is responsible for g...

journal_title：Genetics

authors： Stauffer GV,Brenchley JE

更新日期：1974-06-01 00:00:00

abstract：:Significant correlations between allelic frequencies and environmental variables in a number of insect species have been demonstrated by multivariate techniques. Since many environmental variables show a strong relationship to geographic location and since gene flow between populations can also produce patterns of gen...

journal_title：Genetics

authors： Schaffer HE,Johnson FM

更新日期：1974-05-01 00:00:00

abstract：:Genetical and biochemical studies have been performed with revertants induced in a polyaromatic mutant (No. 58) in the arom gene cluster of Neurospora crassa. In addition to complete and partial revertants able to grow on minimal at both 25 degrees and 35 degrees , temperature-sensitive revertants capable of growth on...

journal_title：Genetics

authors： Case ME,Giles NH

更新日期：1974-04-01 00:00:00

abstract：:Hairpin-tail (T(hp)) is a new allele of brachyury on chromosome 17 (linkage group IX) of the mouse. The morphological effects in the heterozygote are on the notochord and the tail. The homozygous abnormal is unknown. T(hp) is unique in that the phenotype of the heterozygote seems to depend on the source of the T(hp) g...

journal_title：Genetics

authors： JOHNSON DR

更新日期：1974-04-01 00:00:00

abstract：:The genetic and environmental components of variance for two quantitative characters were measured in the descendants of Drosophila melanogaster populations which had been grown for several generations at densities of 100, 200, 300, and 400 eggs per vial. Populations subject to intermediate densities had a greater pro...

journal_title：Genetics

authors： Long T,Long G

更新日期：1974-03-01 00:00:00

abstract：:Using a new model of isoalleles, extensive Monte Carlo experiments were performed to examine the pattern of allelic distribution in a finite population. In this model it was assumed that the set of allelic states is represented by discrete points on a one-dimensional lattice and that change of state by mutation occurs...

journal_title：Genetics

authors： Ohta T,Kimura M

更新日期：1974-03-01 00:00:00

abstract：:In random mating autopolyploid populations which have not reached equilibrium, two alleles may be interdependent as a result of the phenomenon of gametic recombination, i.e. the maintenance through successive gamete generations of an association of two alleles from the same gamete in a source reference generation. Any...

journal_title：Genetics

authors： Gallais A

更新日期：1974-03-01 00:00:00

abstract：:Complementation and polarity suppression data are interpreted in terms of the genetic structure of the maltose B region. It is proposed that this region comprises two divergent operons. One operon includes malK, a cistron involved in maltose permeation, and lamB the only known cistron specifically involved in lambda r...

journal_title：Genetics

authors： Hofnung M

更新日期：1974-02-01 00:00:00

abstract：:A continuing study of mortality rates among children born to survivors of the atomic bombings and a suitable group of controls has been updated; the average interval between birth and verification of death or survival is 17 years. The mortality experience is now based on 18,946 children liveborn to parents one or both...

journal_title：Genetics

authors： Neel JV,Kato H,Schull WJ

更新日期：1974-02-01 00:00:00

abstract：:A multi-locus model for complete positive assortative mating is discussed. For a two-locus model, if the gene frequencies for the two loci are different, as they are likely to be, it is shown that in equilibrium the population is not composed of only two homozygous types, as is usually thought. The limiting distributi...

journal_title：Genetics

authors： Ghai GL

更新日期：1973-12-01 00:00:00

abstract：:Twelve laboratory populations of recently collected Drosophila willistoni were begun with different frequencies of alleles at three enzyme loci, six populations at 25 degrees and six at 19 degrees . Periodic sampling of the populations allowed monitoring of the frequency changes in allozymes over time.-At Lap-5 (a loc...

journal_title：Genetics

authors： Powell JR

更新日期：1973-11-01 00:00:00

abstract：:The central and marginal populations of D. robusta differ greatly in the level of inversion polymorphism; the marginal populations are monomorphic or nearly so and the central populations are highly polymorphic. This paper presents the frequencies of alleles at forty gene loci in various populations of D. robusta, stu...

journal_title：Genetics

authors： Prakash S

更新日期：1973-10-01 00:00:00

abstract：:The type of variegation of eyes of white-mottled mutants of D. hydei, either small-spotted or large-spotted, depends on the specific chromosome rearrangement involved. This distinction between mutants, though handsome, is not absolute because very seldomly small-spotted types do show a larger pigment aggregate and som...

journal_title：Genetics

authors： van Breugel FM

更新日期：1973-10-01 00:00:00

abstract：:A spontaneous lethal mutation rate approximately twenty to thirty times greater than normal has been discovered in second and third chromosomes derived from an irradiated isogenic line and paired with marked inversion chromosomes. Mutations resulting in reductions of viability of varying magnitude short of complete le...

journal_title：Genetics

authors： Kidwell MG,Kidwell JF,Nei M

更新日期：1973-09-01 00:00:00

abstract：:Inbred strains of mice show differential skin inflammatory reactivity following the topical application of polycyclic hydrocarbons. Strains also differ in the extent to which hepatic aryl hydrocarbon hydroxylase activity is induced by these compounds. Differential inflammatory response and hydroxylase inducibility are...

journal_title：Genetics

authors： Thomas PE,Hutton JJ,Taylor BA

更新日期：1973-08-01 00:00:00

abstract：:The isozymic patterns of tyrosine aminotransferase, NADP malate dehydrogenase, NADP isocitrate dehydrogenase, and tetrazolium oxidase were examined by starch-gel electrophoresis in Tetrahymena pyriformis, syngen 1. The genetics of the alleles controlling these enzymes was studied through a breeding program. Each enzym...

journal_title：Genetics

authors： Borden D,Miller ET,Nanney DL,Whitt GS

更新日期：1973-08-01 00:00:00

abstract：:Dimethylnitrosamine and diethylnitrosamine, two potent carcinogens, are nonmutagenic when tested directly in microorganisms. Likewise 1-naphthylamine and 2-naphthylamine are also nonmutagenic but the N-hydroxy derivatives are mutagenic in microorganisms. Apparently these compounds require metabolism to breakdown produ...

journal_title：Genetics

authors： Mayer VW

更新日期：1973-07-01 00:00:00

abstract：:The level of activity of the enzyme glucose-6-phosphate dehydrogenase was determinel in flies having seven different chromosomic constitutions. All those having an integral number of chromosomes [XAA, XXAA, XAAA, XXAAA, and XXXAAA (X=Xchromosome, A=set of autosomes)] were found to have similar units of enzyme activity...

journal_title：Genetics

authors： Maroni G,Plaut W

更新日期：1973-06-01 00:00:00

abstract：:In S. commune the frequency of recombination between the two subunits, alpha and beta, of the B incompatibility factor is genetically controlled. Analysis of the progeny obtained from crosses between high- and low-recombining strains indicates that the gene controlling recombination frequency in the B factor is linked...

journal_title：Genetics

authors： Koltin Y,Stamberg J

更新日期：1973-05-01 00:00:00

abstract：:Host mutations in Escherichia coli K12 selected for the temperature-sensitive replication of the bacterial plasmid colicinogenic factor E(1) (ColE(1)) exhibit a pleiotropic effect with respect to the effect of the mutation on other extra-chromosomal elements. The mutations also vary with respect to the time of incubat...

journal_title：Genetics

authors： Kingsbury DT,Sieckmann DG,Helinski DR

更新日期：1973-05-01 00:00:00

abstract：:THE FOLLOWING MODELS ARE CONSIDERED FOR THE GENETIC DETERMINATION OF QUANTITATIVE TRAITS: segregation at one locus, at two linked loci, at any number of equal and additive unlinked loci, and at one major locus and an indefinite number of equal and additive loci. In each case an appropriate likelihood is given for data...

journal_title：Genetics

authors： Elston RC,Stewart J

更新日期：1973-04-01 00:00:00

abstract：:The F(1) hybrids of Nicotiana suaveolens (subgenus Petunioides, 2n = 32) and N. glutinosa (subgenus Tabacum, 2n = 24), were examined during their development, from seedlings to mature plants. It was observed that in the hybrids, there was a progressive change of dominant N. glutinosa morphological characteristics towa...

journal_title：Genetics

authors： Gupta SB,Gupta P

更新日期：1973-04-01 00:00:00

abstract：:This paper presents the results of a study of linkage disequilibrium between five polymorphic enzyme genes located on chromosome 3 of D. melanogaster. Three sets of chromosomes were examined: two represented samples from successive years of the same natural population, and one came from a large laboratory population. ...

journal_title：Genetics

authors： Charlesworth B,Charlesworth D

更新日期：1973-02-01 00:00:00

abstract：:Of 313 motility-deficient mutants isolated from an LT2 his(amber) strain fixed in phase 1 by gene vh2(-), 25 regained motility when amber or ochre suppressors were introduced, in F' factors or by transduction. The fla mutants (23 amber, 1 ochre) fell in complementation groups A, B, C, F, K, a new group, M, and at leas...

journal_title：Genetics

authors： Vary PS,Stocker BA

更新日期：1973-02-01 00:00:00

abstract：:Considering a random mating population of finite size, the variance of the number of loci having a given gene frequency was derived under the assumption of a steady flux of mutations. The variance of average heterozygosity among populations was also derived under the same assumption. It was shown that these variances ...

journal_title：Genetics

authors： Maruyama T

更新日期：1973-02-01 00:00:00

abstract：:The time of the pre-meiotic S-period was determined by (32)P incorporation in synchronously germinating zygospores of Chlamydomonas reinhardi at six and one-half to seven hours after the beginning of germination. Phenethyl alcohol treatment caused death of zygospores at a period one hour before the S-period, and also ...

journal_title：Genetics

authors： Chiu SM,Hastings PJ

更新日期：1973-01-01 00:00:00

abstract：:Phenoxazinone synthetase, which catalyzes the condensation of 3-hydroxykynurenine to xanthommatin, the brown eye pigment of Drosophila, is shown to exist in association with a particle which resembles the cytologically defined Type I pigment granule. Several classical eye color mutants (v, cn, st, ltd, cd, w), includi...

journal_title：Genetics

authors： Phillips JP,Forrest HS,Kulkarni AD

更新日期：1973-01-01 00:00:00

abstract：:Data for Apis mellifera indicate that the P-3 proteins and one esterase enzyme are controlled by two genes, P-3 and Est, with two alleles each. The frequency of the P-3 alleles is different in the two subspecies (adansonii and ligustica), that for P-3(F) in Italian bees being 46.9% and in African 0.5%. The frequency o...

journal_title：Genetics

authors： Mestriner MA,Contel EP

更新日期：1972-12-01 00:00:00

abstract：:A computer system for the storage and processing of microbial meiotic data has been developed. Based on the language Fortran 4, the program retrieves relevant data and determines the order, map distances, and coefficient of coincidence for any three-gene group. Meiotic data from Aspergillus nidulans were used to test ...

journal_title：Genetics

authors： Dorn GL

更新日期：1972-12-01 00:00:00

abstract：:The change in frequencies of D. melanogaster and D. simulans in competition experiments was used to measure the effect of radiation on the fitness of a population. A dose of 250 or 500 rads given to the males of highly inbred lines of D. simulans at the beginning of competition and every three weeks thereafter increas...

journal_title：Genetics

authors： Blaylock BG,Shugart HH Jr

更新日期：1972-11-01 00:00:00

abstract：:The satellite DNA's from the embryos of five species of Drosophila (D. melanogaster, D. simulans, D. nasuta, D. virilis and D. hydei) have been analyzed for the presence of closed circular duplex DNA molecules, as determined by CsCl-EBr gradients. Circular DNA molecules were found in every species but D. melanogaster....

journal_title：Genetics

authors： Travaglini EC,Schultz J

更新日期：1972-11-01 00:00:00

abstract：:Tetrazolium oxidase from the blood and liver of rainbow trout was found to be genetically polymorphic. The inheritance pattern of the liver enzyme was compatible only with a one locus-two allele hypothesis. The enzymes in the blood while having an electrophoretically identical polymorphism could differ genotypically f...

journal_title：Genetics

authors： Cederbaum SD,Yoshida A

更新日期：1972-10-01 00:00:00

abstract：:The behaviour of two "meiotic drive" systems, Segregation-Distorter (SD) and the sex chromosome sc(4)sc(8) has been examined in the same meiocyte. It has been found that the two systems interact in a specific way. When the distorting effects of SD and sc(4)sc(8) are against each other, there is no detectable interacti...

journal_title：Genetics

authors： Miklos GL,Yanders AF,Peacock WJ

更新日期：1972-09-01 00:00:00

abstract：:Zymograms were analyzed of a number of Triticum aestivum derivatives which incorporated a segment of the Aegilops umbellulata chromosome bearing resistance to leaf rust. Evidence has been presented which suggests that genes involved in the production of two peroxidases and a single peptidase are located on the short a...

journal_title：Genetics

authors： Macdonald T,Smith HH

更新日期：1972-09-01 00:00:00

abstract：:Natural populations of Daphnia magna have been found which are polymorphic for electrophoretic variants of supernatant malic dehydrogenase, esterase, and alkaline phosphatase. Using these enzyme variants as genetic markers it has been possible to demonstrate the absence of recombination during parthenogenetic reproduc...

journal_title：Genetics

authors： Hebert PD,Ward RD

更新日期：1972-08-01 00:00:00

abstract：:A mutant strain of Chlamydomonas reinhardi which is UV sensitive as a result of a single-gene chromosomal mutation has also been found to exhibit reduced recombination. In crosses homozygous for the mutant allele, a reduction in recombination frequency was demonstrated in two different linkage groups and in three diff...

journal_title：Genetics

authors： Rosen H,Ebersold WT

更新日期：1972-06-01 00:00:00