Faculty Opinions recommendation of Compensatory cis-trans evolution and the dysregulation of gene expression in interspecific hybrids of Drosophila.

2005 ◽  
Author(s):  
Patricia Simpson
Keyword(s):  
Gene Expression ◽  
Interspecific Hybrids

Drought physiology and gene expression characteristics of Fraxinus interspecific hybrids

2015 ◽  
Vol 78 (2) ◽  
pp. 179-193 ◽  
Author(s):  
Zhilong He ◽  
Yaguang Zhan ◽  
Fansuo Zeng ◽  
Xingtang Zhao ◽  
Xuan Wang
Keyword(s):  
Gene Expression ◽  
Interspecific Hybrids ◽  
Expression Characteristics

scholarly journals Genomic Balance and Speciation

2019 ◽  
Vol 12 ◽  
pp. 251686571984029 ◽  
Author(s):  
James A Birchler ◽  
Reiner A Veitia
Keyword(s):  
Gene Expression ◽  
Gene Flow ◽  
Interspecific Hybrids ◽  
Molecular Complexes ◽  
Species Hybrid ◽  
Genomic Imbalance ◽  
Macromolecular Complexes ◽  
Relationship Of ◽  
Signaling Components

The role of genomic balance in accumulating species hybrid incompatibilities is discussed. Aneuploidy has been shown to produce more global modulations than polyploidy with the responsible genes being transcription factors and signaling components involved in molecular complexes, illustrating a stoichiometric component to gene expression. Genomic imbalance is usually detrimental to the organism and in many cases results in lethality. Here, it is proposed that once gene flow is prevented between or within populations by various speciation initiating processes, the stoichiometric relationship of members of macromolecular complexes can change via compensatory drift with the eventual result of newly established functional balances. However, when these new relationships are brought together in interspecific hybrids, detrimental consequences will occur. We suggest that these detrimental interactions contribute to hybrid incompatibilities.

Insights into the evolution of duplicate gene expression in polyploids from GossypiumThis paper is one of a selection of papers published in the Special Issue on Systematics Research.

Botany ◽  
2008 ◽  
Vol 86 (8) ◽  
pp. 827-834 ◽  
Author(s):  
Keith L. Adams
Keyword(s):  
Gene Expression ◽  
Interspecific Hybrids ◽  
Chromosome Doubling ◽  
Morphological Evolution ◽  
Duplicate Gene ◽  
Raw Material ◽  
Specific Gene ◽  
Organ Specific ◽  
Duplicate Gene Expression ◽  
Selection Of

Polyploidy is a prominent mechanism of speciation in plants that can lead to novel phenotypes. Polyploidy is characterized by novel genetic and genomic consequences that provide raw material for morphological evolution. Polyploids often exhibit changes in genome organization and gene expression compared with their diploid progenitors. The five allopolyploid cotton (Gossypium) species and newly created cotton neopolyploids have been developed as a useful group for studies of duplicated gene expression in polyploids. Here I review recent studies on the evolution of duplicate gene expression in polyploid cotton. In addition I present new expression data from cotton neopolyploids that address the effects on expression of adding a third genome in an allohexaploid, and that provide insights into fine scale organ-specific silencing. Substantial changes in gene expression have occurred in homoeologous genes (gene pairs duplicated by polyploidy), including organ-specific gene silencing and subfunctionalization. Many of the changes in gene expression have occurred on an evolutionary timescale, whereas others occur immediately after genome merger and within a few generations. Abiotic stress can affect the expression of homoeologous gene expression, causing expression partitioning between homoeologs. To examine the effects of interspecific hybridization, without chromosome doubling, on gene expression, interspecific hybrids have been studied. Extensive variation in allelic expression was observed upon hybridization that varied by gene, organ, and genotype. Several hypotheses have been proposed for why gene expression is altered in allopolyploids and interspecific hybrids.

scholarly journals Effects of parental genetic divergence on gene expression patterns in interspecific hybrids of Camellia

BMC Genomics ◽  
2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Min Zhang ◽  
Yi-Wei Tang ◽  
Ji Qi ◽  
Xin-Kai Liu ◽  
Dan-Feng Yan ◽  
...  
Keyword(s):  
Gene Expression ◽  
Genetic Divergence ◽  
Molecular Basis ◽  
Interspecific Hybrids ◽  
Expression Patterns ◽  
Expression Change ◽  
Significant Evidence ◽  
Expression Difference ◽  
Parental Gene ◽  
Over Time

Abstract Background The merging of two divergent genomes during hybridization can result in the remodeling of parental gene expression in hybrids. A molecular basis underling expression change in hybrid is regulatory divergence, which may change with the parental genetic divergence. However, there still no unanimous conclusion for this hypothesis. Results Three species of Camellia with a range of genetic divergence and their F1 hybrids were used to study the effect of parental genetic divergence on gene expression and regulatory patterns in hybrids by RNA-sequencing and allelic expression analysis. We found that though the proportion of differentially expressed genes (DEGs) between the hybrids and their parents did not increase, a greater proportion of DEGs would be non-additively (especially transgressively) expressed in the hybrids as genomes between the parents become more divergent. In addition, the proportion of genes with significant evidence of cis-regulatory divergence increased, whereas with trans-regulatory divergence decreased with parental genetic divergence. Conclusions The discordance within hybrid would intensify as the parents become more divergent, manifesting as more DEGs would be non-additively expressed. Trans-regulatory divergence contributed more to the additively inherited genes than cis, however, its contribution to expression difference would be weakened as cis mutations accumulated over time; and this might be an important reason for that the more divergent the parents are, the greater proportion of DEGs would be non-additively expressed in hybrid.

scholarly journals Compensatory cis-trans Evolution and the Dysregulation of Gene Expression in Interspecific Hybrids of Drosophila

Genetics ◽  
2005 ◽  
Vol 171 (4) ◽  
pp. 1813-1822 ◽  
Author(s):  
Christian R. Landry ◽  
Patricia J. Wittkopp ◽  
Clifford H. Taubes ◽  
Jose M. Ranz ◽  
Andrew G. Clark ◽  
...  
Keyword(s):  
Gene Expression ◽  
Interspecific Hybrids

RUSSIAN WHEAT APHID (Diuraphis noxia) RESISTANCE IN WHEAT AND RELATED SPECIES

1990 ◽  
Vol 70 (3) ◽  
pp. 691-698 ◽  
Author(s):  
K. K. NKONGOLO ◽  
J. S. QUICK ◽  
A. E. LIMIN ◽  
D. B. FOWLER ◽  
F. B. PEAIRS ◽  
...  
Keyword(s):  
Gene Expression ◽  
Related Species ◽  
Interspecific Hybrids ◽  
Close Association ◽  
Russian Wheat Aphid ◽  
Diuraphis Noxia ◽  
Effective Control ◽  
Leaf Chlorosis ◽  
Wide Range ◽  
High Degree

The Russian wheat aphid (RWA) has become a crop pest of significant economic importance in wheat-producing areas of North America. Resistant cultivars offer the opportunity for both economic and effective control of this pest. The present study was initiated to identify genes for RWA resistance in wheat and wheat relatives and to assess the expression of the genes in a wide range of genetic backgrounds. Fifty-two lines, including wheat-related species from various geographic regions, synthetic hexaploid wheats, amphiploids derived from Triticum tauschii × T. timopheevii, T. ventricosum × T. turgidum, and hexaploid and octaploid triticales, were evaluated in the greenhouse for resistance to the RWA. There was a close association between leaf chlorosis and leaf rolling, two components of the RWA damage rating system, but the association varied with species. Close relationships were also observed among levels of damage recorded at six rating times for these two indices of RWA resistance. Eighteen entries were resistant to some degree. A high degree of gene expression for RWA resistance was observed in interspecific hybrids indicating that genes conferring resistance in wheat relatives are accessible for use in wheat improvement by established cytogenetic and plant breeding techniques.Key words: Russian wheat aphid, Diuraphis noxia, Triticeae, Agropyron, interspecific hybrids, gene expression

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