Ribosomal RNA Gene Loci and Their Nucleolar Activity in Brassica alboglabra Bailey

Hereditas ◽  
2004 ◽  
Vol 123 (2) ◽  
pp. 169-173 ◽  
Author(s):  
B. F. Cheng ◽  
W. K. Heneen ◽  
C. Pedersen
Keyword(s):  
Ribosomal Rna ◽  
Ribosomal Rna Gene ◽  
Brassica Alboglabra ◽  
Nucleolar Activity

Fluctuations in ribosomal RNA gene content and nucleolar activity in the cambial region ofAbies balsamea(Pinaceae) shoots during reactivation

1994 ◽  
Vol 81 (11) ◽  
pp. 1384-1389 ◽  
Author(s):  
Andrew D. Lloyd ◽  
Ewa J. Mellerowicz ◽  
Cynthia H. Chow ◽  
Richard T. Riding ◽  
C. H. Anthony Little
Keyword(s):  
Ribosomal Rna ◽  
Gene Content ◽  
Ribosomal Rna Gene ◽  
Nucleolar Activity

scholarly journals Reciprocal recombination and the evolution of the ribosomal gene family of Drosophila melanogaster.

Genetics ◽  
1989 ◽  
Vol 122 (3) ◽  
pp. 617-624 ◽  
Author(s):  
S M Williams ◽  
J A Kennison ◽  
L G Robbins ◽  
C Strobeck
Keyword(s):  
Drosophila Melanogaster ◽  
Gene Family ◽  
Ribosomal Rna ◽  
Natural Populations ◽  
Ribosomal Gene ◽  
Gene Region ◽  
Ribosomal Rna Gene ◽  
Reciprocal Recombination ◽  
Y Chromosomes ◽  
Length Polymorphisms

Abstract The role of reciprocal recombination in the coevolution of the ribosomal RNA gene family on the X and Y chromosomes of Drosophila melanogaster was assessed by determining the frequency and nature of such exchange. In order to detect exchange events within the ribosomal RNA gene family, both flanking markers and restriction fragment length polymorphisms within the tandemly repeated gene family were used. The vast majority of crossovers between flanking markers were within the ribosomal RNA gene region, indicating that this region is a hotspot for heterochromatic recombination. The frequency of crossovers within the ribosomal RNA gene region was approximately 10(-4) in both X/X and X/Y individuals. In conjunction with published X chromosome-specific and Y chromosome-specific sequences and restriction patterns, the data indicate that reciprocal recombination alone cannot be responsible for the observed variation in natural populations.

scholarly journals Nuclear small-subunit ribosomal RNA gene sequences from representative Ceramiaceae (Ceramiales, Rhodophyta)

1996 ◽  
Vol 31 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Gary W. Saunders ◽  
Isabelle M. Strachan ◽  
John A. West ◽  
Gerald T. Kraft
Keyword(s):  
Ribosomal Rna ◽  
Small Subunit ◽  
Gene Sequences ◽  
Ribosomal Rna Gene ◽  
Small Subunit Ribosomal Rna
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