Meiosis in haploid rye: extensive synapsis and low chiasma frequency
نویسندگان
چکیده
منابع مشابه
Haploid Meiosis in Arabidopsis: Double-Strand Breaks Are Formed and Repaired but Without Synapsis and Crossovers
Two hallmark features of meiosis are i) the formation of crossovers (COs) between homologs and ii) the production of genetically-unique haploid spores that will fuse to restore the somatic ploidy level upon fertilization. In this study we analysed meiosis in haploid Arabidopsis thaliana plants and a range of haploid mutants to understand how meiosis progresses without a homolog. Extremely low c...
متن کاملDynamics of Rye Chromosome 1R Regions with High or Low Crossover Frequency in Homology Search and Synapsis Development
In many organisms, homologous pairing and synapsis depend on the meiotic recombination machinery that repairs double-strand DNA breaks (DSBs) produced at the onset of meiosis. The culmination of recombination via crossover gives rise to chiasmata, which locate distally in many plant species such as rye, Secale cereale. Although, synapsis initiates close to the chromosome ends, a direct effect o...
متن کاملFemale Meiosis: Synapsis, Recombination, and Segregation in Drosophila melanogaster
A century of genetic studies of the meiotic process in Drosophila melanogaster females has been greatly augmented by both modern molecular biology and major advances in cytology. These approaches, and the findings they have allowed, are the subject of this review. Specifically, these efforts have revealed that meiotic pairing in Drosophila females is not an extension of somatic pairing, but rat...
متن کاملDissecting meiosis of rye using translational proteomics.
BACKGROUND AND AIMS Much of our understanding of the genetic control of meiosis has come from recent studies of model organisms, which have given us valuable insights into processes such as recombination and the synapsis of chromosomes. The challenge now is to determine to what extent these models are representative of other groups of organisms, and to what extent generalisations can be made as...
متن کاملMeiosis and Haploid Gametes in the Pathogen Trypanosoma brucei
In eukaryote pathogens, sex is an important driving force in spreading genes for drug resistance, pathogenicity, and virulence. For the parasitic trypanosomes that cause African sleeping sickness, mating occurs during transmission by the tsetse vector and involves meiosis, but haploid gametes have not yet been identified. Here, we show that meiosis is a normal part of development in the insect ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Heredity
سال: 1994
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1994.165