Cytogenetics of Rutaceae. III. Heterochromatin Patterns

Patterns of heterochromatin distribution in plant chromosomes

Cytogenetics of Polyploids III. Dauermodifications in Ageratum conyzoides Linn

The term "dauermodifications' was coined by Jollos in 1913 and he described it as a change induced externally by an experimental means at a definite moment (Jollos 1921). Sonneborn (1950) regarded dauermodifications as the traits induced by environmental conditions, manifesting temporary cytoplasmic inheritance. Hence, after some period, under the original conditions, the induced traits disappe...

Molecular Cytogenetics in Trough Shells (Mactridae, Bivalvia): Divergent GC-Rich Heterochromatin Content

The family Mactridae is composed of a diverse group of marine organisms, commonly known as trough shells or surf clams, which illustrate a global distribution. Although this family includes some of the most fished and cultured bivalve species, their chromosomes are poorly studied. In this work, we analyzed the chromosomes of Spisula solida, Spisula subtruncata and Mactra stultorum by means of f...

Chromatin Damage Patterns Shift According to Eu/Heterochromatin Replication

In order to maintain genetic stability, strictly controlled mechanisms are essential to assure the accuracy of genetic functions. Precise genome replication and correct control of gene ex‐ pression mostly via epigenetic mechanisms are critical in maintaining the stability of ge‐ nomes. Moreover, the characteristic chromatin compartmentalization of mammalian genomes contributes to regulate the h...

Cytogenetics of Melitoma segmentaria (Fabricius, 1804) (Hymenoptera, Apidae) reveals differences in the characteristics of heterochromatin in bees

To date, more than 65 species of Brazilian bees (of the superfamily Apoidea) have been cytogenetically studied, but only a few solitary species have been analyzed. One example is the genus Melitoma Lepeletier & Serville, 1828, for which there is no report in the literature with regard to cytogenetic studies. The objective of the present study is to analyze the chromosome number and morphology o...