We analyzed the Arah1, Arah2, Arah3, and Arah6 homologs in terms of genomic organization, gene duplication, selection pressure, and evolutionary relationships to homologous genes in other species.
Following gene duplication, selection pressures may be altered relative to nonduplicated genes, and those that tend to be retained as duplicates may preferentially belong to functional groups that are under different selection pressures than those that are not.
Rejection of the null hypothesis (θI > 0) indicates that after duplication, selection constraints may have altered many sites differently in different classes (thus shifts in substitution rates in different classes; θI values of 0.2814-0.6509 for pairwise comparisons; Additional file 11: Table S4A).
The analyses of gene structures, duplications, and selection provided valuable information on the evolution of grape subtilases.
Moreover, these detection rates ensure that FGP sequences will be of great interest to the evolutionary biologists for analyses of gene and genome duplications and selection at the molecular level, as well as to the plant molecular biological community in general.
A cross-species survey of duplicated genes and gene families indicated that duplication, positive selection and gene conversion have shaped primates, rodents, carnivores and ruminants to different degrees for their speciation and adaptation.
Specifically, I tried to discriminate between patterns of neutral evolution (i.e. gene duplication) and selection for spatial immunome organisation addressing transcriptional regulation and coevolution in particular.
The role of gene duplication, natural selection and functional diversification in the evolution of the nitrilase gene family is unknown.
Various mechanisms including recombination, gene conversion, duplication and selection are thought to contribute to the genome-wide diversity and distribution of NB-LRR gene loci [ 19, 51- 53].
These events are analogous to co-divergence, convergence, duplication, purifying selection and gene loss (respectively) when considered in the context of species and gene tree reconciliation.
