Results 261 to 270 of about 74,036 (282)
Some of the next articles are maybe not open access.
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.
openaire +2 more sources
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.
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
openaire +3 more sources
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
openaire +4 more sources
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 ...
Chantal Desdouets +1 more
openaire +3 more sources
Polyploids with Different Origins and Ancestors Form a Single Sexual Polyploid Species [PDF]
The American Naturalist, 2006 Polyploidization is one of the few mechanisms that can produce instantaneous speciation. Multiple origins of tetraploid lineages from the same two diploid progenitors are common, but here we report the first known instance of a single tetraploid species that originated repeatedly from at least three diploid ancestors.
H. Carl Gerhardt +3 more
openaire +2 more sources
1996
Large gains in the knowledge of plant genetics have been made during the last decade due to the development and application of DNA markers. The use of DNA markers has allowed the construction of linkage maps, assessment of genetic variability, and gene tagging in a variety of species (Sobral and Honeycutt, 1994).
Jorge da Silva, Bruno W. S. Sobral
openaire +2 more sources
Large gains in the knowledge of plant genetics have been made during the last decade due to the development and application of DNA markers. The use of DNA markers has allowed the construction of linkage maps, assessment of genetic variability, and gene tagging in a variety of species (Sobral and Honeycutt, 1994).
Jorge da Silva, Bruno W. S. Sobral
openaire +2 more sources
Disentangling a polyploid genome [PDF]
Nature Plants, 2017 The 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.
openaire +2 more sources
Nature, 1927
MR. HUSKINS' description (NATURE, Jan. 8, p. 49) of the strict correlation he has observed between abnormal chromosome behaviour and abnormal breeding results in fatuoid oats encourages me to put forward suggestions based partly on analogous observations of my own.
openaire +2 more sources
MR. HUSKINS' description (NATURE, Jan. 8, p. 49) of the strict correlation he has observed between abnormal chromosome behaviour and abnormal breeding results in fatuoid oats encourages me to put forward suggestions based partly on analogous observations of my own.
openaire +2 more sources
An Adaptive Polyploid Memetic Algorithm for scheduling trucks at a cross-docking terminal
Information Sciences, 2021M. Dulebenets
semanticscholar +1 more source
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.
openaire +2 more sources
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.
openaire +2 more sources