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Andrew Hipp

A new study of the rearrangements that differentiate species (and possibly drive ) in holocentric ()

Holocentric chromosomes---without localized centromeres---are found in sedges and rushes, sundews, nematodes, and selected clades of insects, centipedes, mites and ticks, scorpions, among others (see bioone.org/doi/abs/10.1600/036 for a review).

Rapid chromosome evolution, potential high genomic complexity, poorly studied.

mdpi.com/2073-4425/14/2/437

Figure 1. Genome of E. ligea (horizontal axis) plotted against genome of M. jurtina (vertical axis). It can be seen that chromosome 1ligea corresponds to chromosome 1jurtina, chromosome 2ligea corresponds to chromosome 4jurtina, chromosome 3ligea corresponds to chromosome 5jurtina, chromosome 4ligea corresponds to chromosome 3jurtina, and so on, and chromosome Zligea corresponds to chromosome Zjurtina. Each short stroke represents a single syntenic block (a supported alignment), positioned according to its position in the genomes of the compared species. All compared chromosomes are syntenic. Twenty pairs of chromosomes are collinear. Nine pairs of chromosomes show the presence of inversions (shown by red arrows).
Figure 4. Circos plot showing synteny comparison between E. ligea and E. aehtiops (a), E. ligea and M. jurtina (b) and E. aethiops and M. jurtina (c). Each link corresponds to a single syntenic block (alignment) and is colored by E. ligea (a,b) and M. jurtina (c) chromosomes. Chromosomes 1–8, 18 and neo-Z of E. aethiops were formed as a result of interchromosomal fusions. Chromosomes of E. ligea and M. jurtina are syntenic.
Feb 13, 2023, 12:54 PM·Public·Web
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