Intersex inflorescences of Rumex acetosa demonstrate that sex determination is unique to each flower

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Cloning and characterization of dispersed repetitive DNA derived from microdissected sex chromosomes of Rumex acetosa.

Rumex acetosa is characterized by a multiple chromosome system (2n = 12 + XX for females, and 2n = 12 + XY1Y2 for males), in which sex is determined by the ratio between the number of X chromosomes and autosome sets. For a better understanding of the molecular structure and evolution of plant sex chromosomes, we have generated a sex chromosome specific library of R. acetosa by microdissection. ...

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Rumex acetosa Y chromosomes: constitutive or facultative heterochromatin?

Condensed Y chromosomes in Rumex acetosa L. root-tip nuclei were studied using 5-azaC treatment and immunohistochemical detection of methylated histones. Although Y chromosomes were decondensed within root meristem in vivo, they became condensed and heteropycnotic in roots cultured in vitro. 5-azacytidine (5-azaC) treatment of cultured roots caused transitional dispersion of their Y chromosome ...

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Changing attitudes to sex assignment in intersex.

The existence of people who are neither ‘all male’ nor ‘all female’ has long been recognized in many societies and, with the advent of scientific medicine in European societies in the 19th century, effort has been directed at determining the ‘true sex’ of such individuals [5]. Taxonomy was a new and exciting intellectual activity, and cases of ‘doubtful sex’ were a challenge to science and medi...

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Contrasting Patterns of Transposable Element and Satellite Distribution on Sex Chromosomes (XY1Y2) in the Dioecious Plant Rumex acetosa

Rumex acetosa is a dioecious plant with the XY1Y2 sex chromosome system. Both Y chromosomes are heterochromatic and are thought to be degenerated. We performed low-pass 454 sequencing and similarity-based clustering of male and female genomic 454 reads to identify and characterize major groups of R. acetosa repetitive DNA. We found that Copia and Gypsy retrotransposons dominated, followed by DN...

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ژورنال

عنوان ژورنال: New Phytologist

سال: 2005

ISSN: 0028-646X,1469-8137

DOI: 10.1111/j.1469-8137.2005.01281.x