Results 271 to 280 of about 59,040 (314)
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Megakaryocyte and polyploidization
Experimental Hematology, 2018In mammals, platelets are produced in the blood by cytoplasmic fragmentation of megakaryocytes (MKs). Platelet production is thus dependent on both the MK number and size. During differentiation, MKs switch from a division by mitosis to polyploidization by endomitosis to increase their size. The endomitotic process includes several successive rounds of
Stefania, Mazzi +4 more
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1980
Following Winge’s classic paper on Polyploidy (1), there have been a large number of publications dealing with various aspects of the subject. However, this symposium is probably the first to bring together at one place and at one time so many different viewpoints and disciplines dealing with this subject.
R C, Jackson, J, Casey
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Following Winge’s classic paper on Polyploidy (1), there have been a large number of publications dealing with various aspects of the subject. However, this symposium is probably the first to bring together at one place and at one time so many different viewpoints and disciplines dealing with this subject.
R C, Jackson, J, Casey
openaire +2 more sources
Spontaneous polyploidization in cucumber
Theoretical and Applied Genetics, 2017This is the first quantitative estimation of spontaneous polyploidy in cucumber and we detected 2.2% polyploids in a greenhouse study. We provide evidence that polyploidization is consistent with endoreduplication and is an on-going process during plant growth.
Axel O. Ramírez-Madera +4 more
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1980
Polyploidy, a multiplication of the whole chromosomal complement, is a very widespread phenomenon in higher plants. Natural polyploids have been suggested to be more successful than their diploid progenitors under certain conditions. This success may be due to "balance hybridity," i.e., the combination of the advantage of hybridity together with the ...
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Polyploidy, a multiplication of the whole chromosomal complement, is a very widespread phenomenon in higher plants. Natural polyploids have been suggested to be more successful than their diploid progenitors under certain conditions. This success may be due to "balance hybridity," i.e., the combination of the advantage of hybridity together with the ...
openaire +2 more sources
1980
1. Polyploidy is a conspicuous feature of chromosomal evolution in higher plants. It is common in many genera, and numerous species are characterized by diploid and polyploid races. 2. Polyploid evolution is a process not an event. 3. Polyploid may involve somatic chromsome doubling or sexual functioning of cytologically non-reduced gametes.
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1. Polyploidy is a conspicuous feature of chromosomal evolution in higher plants. It is common in many genera, and numerous species are characterized by diploid and polyploid races. 2. Polyploid evolution is a process not an event. 3. Polyploid may involve somatic chromsome doubling or sexual functioning of cytologically non-reduced gametes.
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DNA Damage and Polyploidization
2010A growing body of evidence indicates that polyploidization triggers chromosomal instability and contributes to tumorigenesis. DNA damage is increasingly being recognized for its roles in promoting polyploidization. Although elegant mechanisms known as the DNA damage checkpoints are responsible for halting the cell cycle after DNA damage, agents that ...
Chow, Jeremy Pak Hong +1 more
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Polyploidization of liver cells
2010Eukaryotic organisms usually contain a diploid complement of chromosomes. However, there are a number of exceptions. Organisms containing an increase in DNA content by whole number multiples of the entire set of chromosomes are defined as polyploid. Cells that contain more than two sets of chromosomes were first observed in plants about a century ago ...
Séverine, Celton-Morizur +1 more
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Genome evolution in polyploids
Plant Molecular Biology, 2000Polyploidy is a prominent process in plants and has been significant in the evolutionary history of vertebrates and other eukaryotes. In plants, interdisciplinary approaches combining phylogenetic and molecular genetic perspectives have enhanced our awareness of the myriad genetic interactions made possible by polyploidy. Here, processes and mechanisms
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Disentangling a polyploid genome
Nature Plants, 2017The sequencing and draft assembly of the sweet potato genome has resolved much of its complex genetic redundancies, allowing a better inference of the botanical origin of the staple crop.
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Genetica, 1930
1. The theory of incompatibility in polyploids is discussed in detail, with special reference to thebehaviour of incompatibility in polyploids and the segregation of genetic types in polyploids of different constitution. 2. Cytological evidence is adduced for the tetraploid nature ofVerbascum phoeniceum.
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1. The theory of incompatibility in polyploids is discussed in detail, with special reference to thebehaviour of incompatibility in polyploids and the segregation of genetic types in polyploids of different constitution. 2. Cytological evidence is adduced for the tetraploid nature ofVerbascum phoeniceum.
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