Cytological observation of chromosome breakage in wheat male gametophytes caused by gametocidal action of <i>Aegilops triuncialis</i>-derived chromosome 3C<sup>t</sup>
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چکیده
منابع مشابه
Dissection of barley chromosome 4H in common wheat by the gametocidal system and cytological mapping of chromosome 4H with EST markers.
We used two gametocidal (Gc) chromosomes 2C and 3C(SAT) to dissect barley chromosome 4H added to common wheat. The Gc chromosome induced chromosomal structural rearrangements in the progeny of the 4H addition line of common wheat carrying the monosomic Gc chromosome. We conducted in situ hybridization to select plants carrying rearranged 4H chromosomes and characterized the rearranged chromosom...
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Male gametogenesis was cytologically analyzed in wheat lines homozygous or hemizygous for gametocidal (Gc) factors with different modes of action. The first and second meiotic divisions in all lines were cytologically normal. The postmeiotic mitoses were normal in the homozygous lines; however, chromosome fragments and bridges were observed in the mitoses of the hemizygous lines. The morphology...
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The gametocidal (Gc) chromosome from Aegilops spp induces chromosome mutation, which is introduced into common wheat as a tool of chromosome manipulation for genetic improvement. The Gc chromosome functions similar to a restriction-modification system in bacteria, in which DNA methylation is an important regulator. We treated root tips of wheat carrying Gc chromosomes with the hypomethylation a...
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We have used telomeric DNA to break two acrocentric derivatives of the human Y chromosome into mini-chromosomes that are small enough to be size- fractionated by pulsed-field gel electrophoresis. One of the mini-chromosomes is about 7 Mb in size and sequence-tagged site analysis of this molecule suggests that it corresponds to a simple truncation of the short arm of the Y chromosome. Five of th...
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ژورنال
عنوان ژورنال: Genes & Genetic Systems
سال: 2018
ISSN: 1341-7568,1880-5779
DOI: 10.1266/ggs.18-00010