Results 241 to 250 of about 31,915 (275)

Genome evolution in polyploids

Plant Molecular Biology, 2000
Polyploidy 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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Physiology of Polyploids

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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Polyploidization of liver cells

2010
Eukaryotic 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, Chantal, Desdouets   +1 more
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The Genetic Algebra of Polyploids

Proceedings of the London Mathematical Society, 1980
This paper considers the genetic algebra of polyploids for the case of \(1\) locus and \(2\) alleles and \(r\)-ploidy. The explicit structure for the \(n\)-th generation \(x_n\), is obtained. By working in a canonical basis linearisation of the quadratic transformation \(\varphi: x\to x^2\), denoting random mating, is easily effected and using the ...
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Disentangling a polyploid genome

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.
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Incompatibility in polyploids

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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Challenges of Genotyping Polyploid Species

2014
Most plant species are known to be either ancient or recent polyploids, containing more than one genome as a result of past interspecific hybridization events (allopolyploidy) and/or genome doubling (autopolyploidy). Genotyping in polyploid species offers a set of unique challenges.
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The Behaviour of Polyploids

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.
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Biogeographic patterns of polyploid species for the angiosperm flora in China

Journal of Systematics and Evolution, 2023
Zhi He, Yongbo Liu
exaly  

Creating Polyploid Escherichia Coli and Its Application in Efficient L‐Threonine Production

Advanced Science, 2023
Sumeng Wang, Qingsheng Qi, Quanfeng Liang   +2 more
exaly