Results 211 to 220 of about 22,407 (233)
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1980
The green algae and the charophytes represent the most widely studied groups of algae in respect to their ploidy levels. In some genera increased size accompanies ploidy level changes as well as certain morphological modifications, but in other genera no evident obvious changes can be discerned.
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The green algae and the charophytes represent the most widely studied groups of algae in respect to their ploidy levels. In some genera increased size accompanies ploidy level changes as well as certain morphological modifications, but in other genera no evident obvious changes can be discerned.
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Polyploidy in differentiation and evolution [PDF]
The International Journal of Cell Cloning, 1990 Somatic and generative (germ-line) polyploidy are more widely spread phenomena among living organisms than generally thought. The occurrence of polyploidization and related events in normal and pathological differentiation, their recognized main functions, as well as the structural specificities of polyploid nuclei are reviewed, and the relationship ...
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Polyploidy and liver proliferation
Clinics and Research in Hepatology and Gastroenterology, 2012Organisms 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, and it is now recognized that polyploid cells form in many eukaryotes under a wide variety of circumstances. Although
Séverine Celton-Morizur +6 more
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1980
There is evidence supporting a concept of polyploid evolution in a number of groups of fungi. These typically have dominant diploid phases in their life-histories. There are a number of reports of suspected polyploidy in other fungi, but these should be considered speculative at this time.
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There is evidence supporting a concept of polyploid evolution in a number of groups of fungi. These typically have dominant diploid phases in their life-histories. There are a number of reports of suspected polyploidy in other fungi, but these should be considered speculative at this time.
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1980
A discussion in gymnosperms as a group is somewhat meaningless so far as discerning trends or ascertaining general principles. It is now generally recognized (1, 2) that g3niinosperms as a class probably never existed, and that gymnospermy should be regarded as a way of life rather than suggesting that the plants possessing naked seeds are somehow ...
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A discussion in gymnosperms as a group is somewhat meaningless so far as discerning trends or ascertaining general principles. It is now generally recognized (1, 2) that g3niinosperms as a class probably never existed, and that gymnospermy should be regarded as a way of life rather than suggesting that the plants possessing naked seeds are somehow ...
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, 2012 Legumes are the third largest family of flowering plants, with over 700 genera and more than 19,000 species. Genomic evidence has shown that a whole-genome duplication (WGD) occurred shortly after the origin of the family, in an ancestor that gave rise to the papilionoids, the clade that comprises 65 % of the genera and 71 % of the species, including ...
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Polyploidy in Species Populations
1980Polyploidy in populations of well-differentiated plant species is now widely recognized (1,2). Most reports, however, are limited to a few individuals from one or several populations and thereby illustrate only a fraction of the extant genomic diversity in most species.
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Nature, 1943
RECOGNITION of the polyploid nature of various economic plants has become increasingly important, and the type of polyploidy is also of prime importance in the study of phylogeny within any genus or family of plants. Various cytological and genetical criteria of polyploidy have been used, such as chromosome number, the number of nucleoli, polyvalent ...
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RECOGNITION of the polyploid nature of various economic plants has become increasingly important, and the type of polyploidy is also of prime importance in the study of phylogeny within any genus or family of plants. Various cytological and genetical criteria of polyploidy have been used, such as chromosome number, the number of nucleoli, polyvalent ...
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2017
Earlier, polyploidy was detected on the basis of only a few morphological, cytological and genetic criteria. However, it may not be correct to characterize polyploidy on the above structural basis only because the chromosome pairing behaviour is also affected by other factors (Otto 2007). Polyploids have distinct morphology as compared to their diploid
Reiaz Ul Rehman, Tanvir-Ul-Hassan Dar
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Earlier, polyploidy was detected on the basis of only a few morphological, cytological and genetic criteria. However, it may not be correct to characterize polyploidy on the above structural basis only because the chromosome pairing behaviour is also affected by other factors (Otto 2007). Polyploids have distinct morphology as compared to their diploid
Reiaz Ul Rehman, Tanvir-Ul-Hassan Dar
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2017
Polyploidy refers to the presence of more than two genomes per somatic cell. Generally, the polyploid organism would have multiple sets of chromosomes or either the combination of chromosome sets found in same species or a closely related diploid species.
Tanvir-Ul-Hassan Dar, Reiaz Ul Rehman
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Polyploidy refers to the presence of more than two genomes per somatic cell. Generally, the polyploid organism would have multiple sets of chromosomes or either the combination of chromosome sets found in same species or a closely related diploid species.
Tanvir-Ul-Hassan Dar, Reiaz Ul Rehman
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