Cytogenetics of polyploids.
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Aneuploidy↗
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Molecular techniques applied to polyploids.
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Base Sequence↗
Principles of demographic analysis applied to natural polyploid populations.
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Biological Evolution↗
Chemistry of polyploids: a summary with comments on Parthenium (Asteraceae-ambrosiinae).
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Biological Evolution↗
Polyploidization in the fish family Cyprinidae, order Cypriniformes. I. DNA-content and chromosome sets in various species of Cyprinidae.
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Animals↗
Polyploidization in the fish family Cyprinidae, order Cypriniformes. II. Duplication of the gene loci coding for lactate dehydrogenase (E.C.: 1.1.1.27) and 6-phosphogluconate dehydrogenase (E.C.: 1.1.1.44) in various species of Cyprinidae.
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Animals↗
Polyploidization in vitro: formation of a predominantly triploid cell population in an originally diploid tissue culture of Microtus agrestis.
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Animals↗
[Gene duplication by polyploid evolution: the isoenzyme of the sorbitol dehydrogenase in herring- and salmon-like fishes (Isospondyli)].
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Alleles↗
Duplication of the LDH gene loci by polyploidization in the fish order Clupeiformes.
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Animals↗
Differential replication of satellite DNA in polyploid tissues of Drosophila virilis.
Satellite DNA amounts were examined in adult tissues of Drosophila virilis, a species whose DNA contains three prominent satellites. Satellite amounts in DNA from six of the seven tissues were lower than in DNA from diploid (adult brain) tissue. Satellite amounts in adult ovary DNA, however, were equivalent to or greater than diploid levels. When DNA from pupal ovaries was examined, a 30% increase in satellite amounts over diploid levels was found. An RNA-DNA hybridization experiment showed that the ribosomal RNA genes in pupal ovary DNA were under-replicated relative to diploid DNA levels.
Animals↗
Further studies on polyploid amphibians (Ceratophrydidae). 3. Meiotic aspects of the interspecific triploid hybrid: Odontophrynus cultripes (2n=22) x O. americanus (4n=44).
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Animals↗
[Sex chromatin in polyploid cells].
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Autoradiography↗
Further studies on polyploid amphibians (Ceratophrydidae). II. DNA content and nuclear volume.
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Animals↗
Genetic control of bivalent pairing in the Avena strigosa polyploid complex.
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Chromosomes↗
Further studies on polyploid amphibians (Ceratophrydidae). I. Mitotic and meiotic aspects.
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Animals↗
Chromosome diminution and evolution of polyploid species in Triticum.
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Chromosomes↗
Quantitative cytophotometric studies on polyploid liver cell nuclei of frog and rat.
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Animals↗
Further studies on polyploid amphibians. V. C-banding in diploid and tetraploid species of Odontophrynus.
C-band patterns of some Odontophrynus species from Brazil are described. O. americanus 2n and 4n are cryptic species similar to O. cultripes 2n, but their C-banding patterns are different. In O. americanus 2n the C-band appears at the secondary constriction of chromosomes 4. In O. americanus 4n and O. cultripes the C-band appears at the secondary constriction of chromosomes 11. O. cultripes chromosomes 2,3 and 6, have also an intercalary band. Furthermore, fine centromeric bands in several weeks old preparations of these species were observed. The possibility of a structural or chemical heterogeneity of those heterochromatic regions is discussed.
Animals↗