نتایج جستجو برای: supernumerary marker chromosomes
تعداد نتایج: 200561 فیلتر نتایج به سال:
20 Supernumerary chromosomes have been shown to transfer horizontally from 21 one isolate to another. However, the mechanism by which horizontal chromosome 22 transfer (HCT) occurs is unknown. In this study, we compared the genomes of 11 23 isolates comprising six Fusarium species that cause soybean sudden death syndrome 24 (SDS) or bean root rot (BRR), and detected numerous instances of HCT in...
Prochilodus lineatus is widely used in pisciculture projects, mainly in the south of Brazil. It shows a basic karyotype composed of 2n = 54 chromosomes, in addition to as many as seven supernumerary chromosomes, also known as B-chromosomes. These additional small chromosomes are frequently heterochromatic, vary in number and morphology, and generally have no homology with the A complement. Inte...
Two biotypes (A and B) of Colletotrichum gloeosporioides infect the tropical legumes Stylosanthes spp. in Australia. These biotypes are asexual and vegetatively incompatible. However, field isolates of biotype B carrying a supernumerary 2-Mb chromosome, thought to originate from biotype A, have been reported previously. We tested the hypothesis that the 2-Mb chromosome could be transferred from...
A cytogenetic study was conducted on an Astyanax eigenmanniorum population from the Caetano Stream (18° 44' 56" S/ 048° 18' 39" W) in Uberlândia, MG, Brazil showing a modal diploid number of 48 chromosomes in the standard male and female karyotypes. However, in several specimens it was also possible to observe metaphases with one or two B chromosomes, increasing the diploid number to 49 or 50 c...
A dysmorphic patient was shown to carry a small supernumerary marker chromosome. Multicolor, centromere-multicolor and regular FISH experiments proved the marker to be an analphoid 12pter derived isochromosome. Microdissection of the marker followed by reverse painting and array CGH analysis showed that the isochromosome contains approximately 6 Mb of 12pter-12p13.31 derived sequence. This is o...
We wish to report a trisomy 21 child with two supernumerary fragments, whose mother had possibly related transient chromosome aberrations. The proband was an 8-year-old boy with typical features of Down's syndrome. The lymphocyte chromosomes studied at the ages of 3-5 months and 8 years showed a mosaic karyotype with both cell lines with trisomy 21 and one line (52% of the cells) with two addit...
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