Physical mapping of the Euglena gracilis chloroplast DNA and ribosomal RNA gene region

Biochemistry ◽  
1978 ◽  
Vol 17 (2) ◽  
pp. 284-289 ◽  
Author(s):  
Patrick W. Gray ◽  
Richard B. Hallick
Keyword(s):  
Chloroplast Dna ◽  
Ribosomal Rna ◽  
Physical Mapping ◽  
Euglena Gracilis ◽  
Gene Region ◽  
Ribosomal Rna Gene

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 Characterization and Physical Mapping of Ribosomal RNA Gene Families in Plantago

2006 ◽  
Vol 97 (4) ◽  
pp. 541-548 ◽  
Author(s):  
MANOJ K. DHAR ◽  
BERND FRIEBE ◽  
SANJANA KAUL ◽  
BIKRAM S. GILL
Keyword(s):  
Ribosomal Rna ◽  
Physical Mapping ◽  
Gene Families ◽  
Ribosomal Rna Gene
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