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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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Nucleolar Activity and Distribution of Ribosomal Genes in Phyllotis Rodent Species and their Laboratory Hybrids

Nucleolar Activity and Distribution of Ribosomal Genes in Phyllotis Rodent Species and their Laboratory Hybrids

Actividad Nucleolar Y Distribución De Genes Ribosomales En Especies De Roedores Del Género Phyllotis Y En Sus Híbridos De Laboratorio

Chapter:
(p.901) Nucleolar Activity and Distribution of Ribosomal Genes in Phyllotis Rodent Species and their Laboratory Hybrids
Source:
The Quintessential Naturalist
Author(s):

Laura I. Walker

Sergio V. Flores

Publisher:
University of California Press
DOI:10.1525/california/9780520098596.003.0027

This chapter studies the expression of nucleolar organizer regions (NORs), distinguished through silver staining procedures, and the distribution of ribosomal genes, detected by fluorescent in situ hybridization with a ribosomal DNA probe, in Phyllotis rodent species and their laboratory generated hybrids. It notes that in the hybrids between the more genetically distant species, the NORs of one parental genome were preferentially expressed. The chapter explains that this result differs from the codominant rDNA expression previously detected in hybrids between the two more genetically similar of the three species, and suggests that nucleolar dominance is related to the compatibility of parental genomes.

Keywords:   nucleolar organizer regions, silver staining procedures, ribosomal genes, in situ hybridization, Phyllotis rodent, codominant rDNA expression, parental genomes

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