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Nuclear genes and chloroplast modifications in maize : (Zea mays, iojap , cytoplasmic inheritance, nucleus-cytoplasm interaction, sorting-out, morphological modifications)
(University of Missouri, Agricultural Experiment Station, 1982)
The recessive nuclear genes (ij) and chloroplast mutator (cm) in maize have been studied as examples of genes whose roles affect the continuity of the plastid and its genetic machinery. The phenotypic expression of cm is ...
Some notes on premeiocytes in wheat : (premeiotic mitosis, premeiotic interphase, archesporial cell, pollen mother cell)
(University of Missouri, Agricultural Experiment Station, 1983)
Some characteristics of wheat premeiocytes are described as they appear in electron microscopy. These include changes in the endoplasmic reticulum of archesporial cells in premeiotic mitosis (PMM) and some nuclear and ...
Viroids : minimal genetic systems : (RNA, plant pathogens, replication, pathogenesis)
(University of Missouri, Agricultural Experiment Station, 1980)
SViroids are nucleic acid species of relatively low molecular weight and unique structure that cause several important diseases of cultivated plants. Viroids are the smallest known agents of infectious disease. Unlike viral ...
Medical genetics : impact and strategy : (genetic disease, birth defects, prenatal diagnosis)
(University of Missouri, Agricultural Experiment Station, 1980)
Genetic diseases and birth defects have a major impact on all levels of health care because of their enormous consequences for the individual and family and because of the high frequency of occurrence. That over 3000 ...
Somatic cell genetic analysis of the interferon system : (interferon genetics, interferon receptors , cell hybrids )
(University of Missouri, Agricultural Experiment Station, 1981)
The interferon system is amenable to somatic cell genetic analysis since the genes governing the synthesis of interferon and the cellular responses to interferon can be expressed in tissue culture cells. Limited species ...
The ontogenetic and evolutionary origins of antibody diversity : (antibody diversity, ontogeny, evolution, transposable elements)
(University of Missouri, Agricultural Experiment Station, 1982)
Three ontogenetic origins of antibody diversity have been identified. First, there is a large number of germline gene segments. Second, multiple combinatorial strategies are used to amplify antibody diversity. These include ...
Meiotic mutants in potato breeding : (haploids, 2n gametes, germplasm transfer)
(University of Missouri, Agricultural Experiment Station, 1982)
Three factors provide unusual opportunities for potato improvement: (1) The wild and cultivated tuber-bearing relatives of the potato represent a large source of valuable germplasm. This genetic diversity can be incorporated ...
Nitrogen fixation by photosynthetic bacteria : (Rhodospirilum rubrum, Rhodopseudomonas capsulata, glutamine ,nitrogenase)
(University of Missouri, Agricultural Experiment Station, 1980)
Biological nitrogen fixation is not only essential for world nitrogen balance but it is also an alternative to expensive commercial fertilizer for crop production. To achieve the maximum utilization of this natural process, ...
Molecular evolution in papova viruses and their host species, and in bacteriophages : (evolution, nucleotide substitution, papova viruses)
(University of Missouri, Agricultural Experiment Station, 1980)
Comparing homologous genes of three papova viral genomes, we attempt to show the very close relative phylogeny among the viral species and their host species, and therefore the viral species seem to have evolved with their ...
The topology of homologous pairing : (genetic recombination, RecA protein, strand crossover, joint molecules, heteroduplex joints, branch migration)
(University of Missouri, Agricultural Experiment Station, 1980)
The RecA protein, which is essential for genetic recombination of E. coli , promotes homologous pairing in vitro. Studies of purified RecA protein have shown that it promotes the homologous pairing of a number of topological ...
Monocot and dicot genes encoding the small subunit ofribulose-1,5-bisphosphate carboxylase : structural analysis and gene expression
(University of Missouri, Agricultural Experiment Station, 1983)
Arrangement and rearrangement of the bacterial chromosome : (chromosome rearrangements, transposable elements)
(University of Missouri, Agricultural Experiment Station, 1981)
Several lines of evidence suggest that the arrangement of genes in the bacterial chromosome may have selective importance. To investigate the significance of chromosomal gene order and the effect of position on gene ...
Nuclear control of the expression of the cytochrome b gene in yeast mitochondrial DNA : (apocytochrome b gene, Saccharomyces cerevisiae, CBP1 gene)
(University of Missouri, Agricultural Experiment Station, 1982)
The mitochondrial gene encoding apocytochrome b is mosaic, containing two intervening sequences in the Saccharomyces cerevisiae strain D273-10B. Five nuclear genes and one mitochondrial gene have been identified that are ...
Bacteriophage 16-3 of Rhizobium meliloti and its pattern of recombination : (Rhizobium, phage - vector, recombination)
(University of Missouri, Agricultural Experiment Station, 1982)
Transposable elements and genetic instabilities in crop plants : (controlling elements, recurrent mutations, hybrid dysgenesis, somatic mutations, tissue culture)
(University of Missouri, Agricultural Experiment Station, 1981)
Transposable elements have long been associated with certain unstable loci in maize and have been intensively studied by McClintock and others. It is known that a transposable element can control the expression of the ...
Genetics and evolution of the chloroplast : (cytoplasmic inheritance, nucleus-cytoplasm interaction, plastome recombination, plastome mutator, oenothera)
(University of Missouri, Agricultural Experiment Station, 1983)
As a photosynthetic organelle and as the site of several important biosynthetic pathways, the chloroplast is essential to the survival of the plant cell. In evolutionary terms, the chloroplast genetic material can be ...
Tailoring the agrobacterium Ti plasmid as a vector for plant genetic engineering : (site specific insertions, chimeric gene construction, regeneration of plants containing T- DNA)
(University of Missouri, Agricultural Experiment Station, 1981)
Agrobacterium tumefaciens and its tumor-inducing (Ti) plasmidi constitute a promising vector system for the introduction of desirable genes into higher plant cells. This bacterialpathogen has an unusually wide host range, ...
Meiotic aspects of chromosome organization : (meiosis, pachytene DNA)
(University of Missouri, Agricultural Experiment Station, 1983)
Homologous chromosome pairing regulates the expression of a set of metabolic activities that is unique to the zygotene-pachytene interval , These activities probably relate to crossing-over and they involve specific proteins ...
Evolution of the bacterial genome : (bacterial DNA evolution, vertical vs. horizontal evolution)
(University of Missouri, Agricultural Experiment Station, 1980)
Not all parts of bacterial genomes have evolved at the same rate. Among related genomes, some gene segments are highly conserved, some are less conserved and some are highly variable. We have studied the relatedness of ...
Measures of fitness in Drosophila : (population genetics, Drosophila, fitness, natural selection)
(University of Missouri, Agricultural Experiment Station, 1983)
Ten proposed experimental measures of fitness in Drosophila have been estimated in 8 to 38 strains of D. melanogaster with 1 to 6 replications in order to assess the degree of association among the measures. One measure ...