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Wednesday, July 22, 2020 | History

2 edition of Studies of spontaneous chromosome breakage in interspecific hybrids of Bromus. found in the catalog.

Studies of spontaneous chromosome breakage in interspecific hybrids of Bromus.

Marta Sherman Walters

Studies of spontaneous chromosome breakage in interspecific hybrids of Bromus.

by Marta Sherman Walters

  • 57 Want to read
  • 26 Currently reading

Published by University of California Press in Berkeley .
Written in English

    Subjects:
  • Bromegrasses.,
  • Chromosomes.

  • Edition Notes

    Bibliography: p. 400-404.

    Other titlesChromosome breakage.
    SeriesUniversity of California publications in botany,, v. 28, no. 6, University of California publications in botany ;, v. 28, no. 6.
    Classifications
    LC ClassificationsQK1 .C2 vol. 28, no. 6
    The Physical Object
    Pagination335-447 p.
    Number of Pages447
    ID Numbers
    Open LibraryOL213347M
    LC Control Numbera 57009550
    OCLC/WorldCa1171963

      The site lies in the middle of a tumor suppressor gene and chromosome breakage in this area is highly associated with cancer. "It is an area that has a tumor suppressor gene -- . A cytological survey involving the collection and study of male specimens of two wild populations of grasshoppers belonging to the genusAiolopus was made. In one population, seventeen individuals out of a total of examined had a single supernumerary chromosome in all the dividing cells of their testes, and in the other out of a total of specimens, twenty-nine had one, three had two.

    Interspecific hybrids are bred by mating individuals from two species, normally from within the same genus. The offspring display traits and characteristics of both parents, but are often sterile, preventing gene flow between the species. Sterility is often attributed to the different number of chromosomes between the two species. While chromosome breakage studies are critical in the diagnosis of Fanconi anemia in the affected patient, testing for other at-risk family members requires knowledge of the specific diseasecausing mutations in the family. These mut- ations cannot be identified using the chromosome breakage or other studies performed in our laboratory.

    Bromus-Arten. Botanische Jahrbuecherfuer Systematik Pflanzen- geschichte und Pflanzengeographie ARMSTRONG, Chromosome pairing in hexaploid hybrids. K. C. from Bromus erectus x B. inermis (2n = 56). Canadian Journal of Genetics and Cytology Hybrids of the annual Bromus arvensis with perennial. B. inermis. chromosomal breakage: The disruption of a chromosome, as by radiation or toxic chemicals. When this occurs, the two fragments may rejoin, or a fragment may rejoin another broken chromosome. Unrepaired chromosome breaks are associated with many malignant and premalignant conditions.


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Studies of spontaneous chromosome breakage in interspecific hybrids of Bromus by Marta Sherman Walters Download PDF EPUB FB2

Get this from a library. Studies of spontaneous chromosome breakage in interspecific hybrids of Bromus. [Marta Sherman Walters]. $ Studies of Spontaneous Chromosome Breakage in Interspecific Hybrids of Bromus: University of California Publications in Botany, V28, No. 6 Paperback – Febru by Marta Sherman Walters (Author), F.

Addicott (Editor), M. Mathias (Editor) & 0 more See all formats and editions Hide other formats and editionsAuthor: Marta Sherman Walters.

James R. Cook MD, PhD, in Hematopathology (Third Edition), Metaphase Cytogenetic Studies. In addition to chromosome breakage studies, metaphase cytogenetic analysis is important in the evaluation of suspected FA. Uncomplicated cases of FA are usually associated with a normal karyotype, although spontaneous chromosome breaks, similar to those induced by mitomycin C or.

Meiotic chromosome pairing was studied at metaphase I of B. erectus (2n = 28), B. inermis (2n = 56) and interspecific hybrids from B. erectus × B. inermis (2n = 42). Interspecific hybrids were successfully produced, using embryo culture, between Eurasian and American species of Bromus section Pnigma.

Studies of spontaneous chromosome breakage in. Male Sterility  Lampbrush Chromosome  Fourth Chromosome  Gossypium Barbadense  Hybrid Derivative  These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm improves. Aided by. Walters, M. S.: Spontaneous breakage and reunion of meiotic chromosomes in the hybrid Bromus trinii x B.

maritimus. Genet 11–37 (). PubMed PubMedCentral Google Scholar. Spontaneous breakage and reunion of meiotic chromosomes in the hybrid Bromus Trinii xB. maritimus. WALTERS MS. Genetics, 35(1), illust, 01 Jan Cited by 11 articles | PMID: | PMCID: PMC Free to read.

Spontaneous chromosome breakage and atypical chromosome movement in meiosis of the hybrid Bromus marginatus X B. pseudolaevipes. Genetics, 37, 8– Google Scholar.

FLOWER VARIEGATION IN HYBRIDS BETWEEN NICOTIANA TABACUM AND N. OTOPHORA FLOWER VARIEGATION IN HYBRIDS BETWEEN NICOTIANA TABACUM AND N. OTOPHORA D. Gerstel and J. Burns Department of Crop Science, North Carolina State University at Raleigh Received November 2.

HE fate of genes and chromosomes following interspecific gene transfer Tdeserves detailed study. Analyzes chromosomes in newborns and infants for changes that can explain certain birth defects or developmental delays.

Pregnancy Multiple testing options providing information on the genetic health of your baby during the first and second trimesters. Chromosome studies in Trilliurn kamtschaticum Pall.

Cytologia, 8, – Spontaneous chromosome breakage in hybrid endosperms. Chromosoma, 8, – Article Google Scholar. Pairing between heteromorphic chromosomes was also detected (Fig. Another interesting abnormality observed during the present study was the spontaneous fragmentation of chromosomes during meiosis (Fig.

Thirty per cent of the cells observed in prophase showed varying numbers of chromosome fragmentation. These hybrid lines would be valuable genetic resources both for breeding more productive cultivars with novel agronomic traits and for research to better understand each chromosome and gene in these hybrids.

In each instance, it is first necessary to develop true F 1 hybrids and as many of their progeny as possible. CHROMOSOME BREAKAGE IN BKOMUS 9 was studied in iron-acetocarmine smears of microsporocytes.

One anther of the hybrid material was sectioned at 8 p and stained with STOCKWELL'S () triple stain. MEIOSIS IN TIJE PAIUchromosomes.

The results show that spontaneous breakage is found to occur during meiosis in all males exhibiting recombination. but not in those lacking it. MATERIALS AND METHODS Stocks: All stocks were maintained at 25 t 2” on a yeasted oatmeal, molasses, agar, nipagin medium.

The mutant genes, chromosome rearrangements, and wild-type stocks are as follows. CYTOGENETICS OF FLOWER MODIFICATION OF A CYTOPLASMIC MALE-STERILE TOBACCO D. Gerstel 1, J. Burns 1, and S. Sand 2 1 Department of Crop Science, North Carolina State University, Raleigh, North Carolina 2 Plant Genetics Section, Roswell Park Memorial Institute Orchard Park, New York Plants combining the cytoplasm of Nicotiana debneyi and the 48 chromosomes.

SPONTANEOUS BREAKAGE AND REUNION OF MEIOTIC CHROMOSOMES IN THE HYBRID BROMUS TRINIIXB. MARITIMUS MARTA SHERMAN WALTERS University of California, Berkeley, California Received April 8, INTRODUCTION T HE present investigation was begun when a preliminary survey of meiosis in the hybrid Bromus TriniiXB.

maritimus showed not only numerous. Chromosome phylogeny and habitat preference in Clarkia. Evolution 7: Walters, M. Studies of spontaneous chromosome breakage in interspecific hybrids of Bromus.

Univ. Calif. Publ. Bot. STUDIES ON SECOTIACEOUS FUNGI-IV study revealed that we were dealing with a single genus of the Gastromyeetes.

The inviability, weakness and sterility of interspecific hybrids. The karyotype in taxonomy. In: Modern methods of plant taxonomy. The meiotic consequences of spontaneous chromosome breakage.

The origin of the wide species variation in nuclear DNA content. (). Spontaneous Chromosome Breakage and Atypical Chromosome Movement in Meiosis of the Hybrid Bromus Marginatus x B. Pseudolaevipes Marta Sherman Walters .The creation of intergeneric somatic hybrids between Citrus and Poncirus is an efficient approach for citrus rootstock breeding, offering the possibility of combining beneficial traits from both genera into novel rootstock lineages.

These somatic hybrids are also used as parents for further tetraploid sexual breeding. In order to optimize these latter breeding schemes, it is essential to.chromosome 21 breaks and attaches itself to another chromosome, often chromosome The Down’s child will then inherit that chromosome with the extra piece of The least common form is mosaicism, accounting for about 1% of cases.

Here, some of the person’s cells carry the normal chromosome complement while others carry extra chromosome