On the divergence of members of a transposable element family

1986 ◽  
Vol 24 (2) ◽  
Author(s):  
RichardR. Hudson ◽  
NormanL. Kaplan
Keyword(s):  
Transposable Element ◽  
Transposable Element Family

scholarly journals Molecular evolution of the Ac/Ds transposable-element family in pearl millet and other grasses.

Genetics ◽  
1995 ◽  
Vol 139 (3) ◽  
pp. 1411-1419
Author(s):  
G A Huttley ◽  
A F MacRae ◽  
M T Clegg
Keyword(s):  
Transposable Element ◽  
Pearl Millet ◽  
Pennisetum Glaucum ◽  
Grass Species ◽  
Deletion Derivative ◽  
Transposable Element Family ◽  
Sequence Identity ◽  
Grass Family ◽  
Sequence Relationships ◽  
Different Levels

Abstract We report an Ac-like sequence from pearl millet (Pennisetum glaucum) and deletion derivative Ac-like sequences from pearl millet and another grass species, Bambusa multiplex. Sequence relationships between the pearl millet and maize Ac elements suggest that Ac/Ds transposable-element family is ancient. Further, the sequence identity between the Bambusa Ac-like sequence and maize Ac implies that the Ac/Ds transposable-element family has been in the grass family since its inception. The Ac-like sequences reported from pearl millet and maize Ac are statistically heterogeneous in pair-wise distance comparisons to each other. Yet, we are unable to discriminate between differential selection or ectopic exchange (recombination and conversion) between nonidentical transposable element homologues, as the cause of the heterogeneity. However, the more extreme heterogeneity exhibited between the previously described pearl millet element and maize Ac seems likely to derive from ectopic exchange between elements with different levels of divergence.

scholarly journals Expansion of a single transposable element family is associated with genome-size increase and radiation in the genus Hydra

2019 ◽  
Vol 116 (46) ◽  
pp. 22915-22917 ◽  
Author(s):  
Wai Yee Wong ◽  
Oleg Simakov ◽  
Diane M. Bridge ◽  
Paulyn Cartwright ◽  
Anthony J. Bellantuono ◽  
...  
Keyword(s):  
Transposable Elements ◽  
Transposable Element ◽  
Genome Size ◽  
Focal Point ◽  
Size Increase ◽  
Single Family ◽  
Evolutionary Patterns ◽  
Transposable Element Family ◽  
Chicken Repeat ◽  
Long Interspersed Nuclear Elements

Transposable elements are one of the major contributors to genome-size differences in metazoans. Despite this, relatively little is known about the evolutionary patterns of element expansions and the element families involved. Here we report a broad genomic sampling within the genus Hydra, a freshwater cnidarian at the focal point of diverse research in regeneration, symbiosis, biogeography, and aging. We find that the genome of Hydra is the result of an expansion event involving long interspersed nuclear elements and in particular a single family of the chicken repeat 1 (CR1) class. This expansion is unique to a subgroup of the genus Hydra, the brown hydras, and is absent in the green hydra, which has a repeat landscape similar to that of other cnidarians. These features of the genome make Hydra attractive for studies of transposon-driven genome expansions and speciation.

The pogo transposable element family of Drosophila melanogaster

1992 ◽  
Vol 232 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Mark Tudor ◽  
Malgorzata Lobocka ◽  
Margaret Goodell ◽  
Jonathan Pettitt ◽  
Kevin O'Hare
Keyword(s):  
Drosophila Melanogaster ◽  
Transposable Element ◽  
Transposable Element Family

scholarly journals Analysis of a mutator activity necessary for germline transposition and excision of Tc1 transposable elements in Caenorhabditis elegans.

Genetics ◽  
1988 ◽  
Vol 120 (2) ◽  
pp. 397-407
Author(s):  
I Mori ◽  
D G Moerman ◽  
R H Waterston
Keyword(s):  
Caenorhabditis Elegans ◽  
Transposable Elements ◽  
Transposable Element ◽  
Molecular Basis ◽  
Copy Number ◽  
Nematode Caenorhabditis Elegans ◽  
Transposable Element Family ◽  
Genetic Components ◽  
Mutator Activity ◽  
Low Copy Number

Abstract The Tc1 transposable element family of the nematode Caenorhabditis elegans consists primarily of 1.6-kb size elements. This uniformity of size is in contrast to P in Drosophila and Ac/Ds in maize. Germline transposition and excision of Tc1 are detectable in the Bergerac (BO) strain, but not in the commonly used Bristol (N2) strain. A previous study suggested that multiple genetic components are responsible for the germline Tc1 activity of the BO strain. To analyze further this mutator activity, we derived hybrid strains between the BO strain and the N2 strain. One of the hybrid strains exhibits a single locus of mutator activity, designated mut-4, which maps to LGI. Two additional mutators, mut-5 II and mut-6 IV, arose spontaneously in mut-4 harboring strains. This spontaneous appearance of mutator activity at new sites suggests that the mutator itself transposes. The single mutator-harboring strains with low Tc1 copy number generated in this study should be useful in investigations of the molecular basis of mutator activity. As a first step toward this goal, we examined the Tc1 elements in these low copy number strains for elements consistently co-segregating with mutator activity. Three possible candidates were identified: none was larger than 1.6 kb.

scholarly journals Discovery and annotation of a novel transposable element family in Gossypium

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Hejun Lu ◽  
Xinglei Cui ◽  
Zhen Liu ◽  
Yuling Liu ◽  
Xingxing Wang ◽  
...  
Keyword(s):  
Transposable Element ◽  
Transposable Element Family

A copia-like transposable element family in Arabidopsis thaliana

Nature ◽  
1988 ◽  
Vol 336 (6196) ◽  
pp. 242-244 ◽  
Author(s):  
Daniel F. Voytas ◽  
Frederick M. Ausubel
Keyword(s):  
Arabidopsis Thaliana ◽  
Transposable Element ◽  
Transposable Element Family
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