Chromosome segment duplications inNeurospora crassa: barren crosses beget fertile science

BioEssays ◽  
2009 ◽  
Vol 31 (2) ◽  
pp. 209-219 ◽  
Author(s):  
Parmit K. Singh ◽  
Srividhya V. Iyer ◽  
Mukund Ramakrishnan ◽  
Durgadas P. Kasbekar
Keyword(s):  
Chromosome Segment ◽  
Chromosome Segment Duplications ◽  
Inneurospora Crassa

Escape From Repeat-Induced Point Mutation of a Gene-Sized Duplication in Neurospora crassa Crosses That Are Heterozygous for a Larger Chromosome Segment Duplication

Genetics ◽  
2001 ◽  
Vol 157 (4) ◽  
pp. 1581-1590 ◽  
Author(s):  
Ashwin Bhat ◽  
Durgadas P Kasbekar
Keyword(s):  
Transposable Element ◽  
Neurospora Crassa ◽  
Point Mutation ◽  
Target Gene ◽  
The Other ◽  
Chromosome Segment ◽  
Chromosome Segment Duplications ◽  
Repeat Induced Point Mutation

Abstract In Neurospora crassa the ability of an ectopic gene-sized duplication to induce repeat-induced point mutation (RIP) in its target gene was suppressed in crosses that were heterozygous for another larger chromosome segment duplication. Specifically, the frequency of RIP in the erg-3 gene due to a 1.3-kb duplication was reduced if the chromosome segment duplications Dp(IIIR > [I;II]) AR17, Dp(VIR > IIIR) OY329, or Dp(IVR > VII) S1229 were present in either the same or the other parental nucleus of the premeiotic dikaryon. We suggest that the larger duplications act as sinks to titrate the RIP machinery away from the smaller duplication. In contrast, RIP efficiency was relatively unaffected in comparably unproductive interspecies crosses with N. intermedia and N. tetrasperma. These findings offer a novel explanation for the observed persistence of the transposable element Tad in only a subset of Neurospora strains.

Translocations used to generate chromosome segment duplications in Neurospora can disrupt genes and create novel open reading frames

2010 ◽  
Vol 35 (4) ◽  
pp. 539-546 ◽  
Author(s):  
Parmit K. Singh ◽  
Srividhya V. Iyer ◽  
T. Naga Sowjanya ◽  
B. Kranthi Raj ◽  
Durgadas P. Kasbekar
Keyword(s):  
Open Reading Frames ◽  
Chromosome Segment ◽  
Chromosome Segment Duplications ◽  
Reading Frames

Nucleotide degrading enzymes inNeurospora crassa

1974 ◽  
Vol 14 (7) ◽  
pp. 581-591 ◽  
Author(s):  
A. K. Mattoo ◽  
Zarna M. Shah
Keyword(s):  
Degrading Enzymes ◽  
Inneurospora Crassa
Sign in / Sign up

Export Citation Format

Share Document