Three potato centromeres are associated with distinct haplotypes with or without megabase-sized satellite repeat arrays.
نویسندگان
چکیده
We report discoveries of different haplotypes associated with the centromeres of three potato chromosomes, including haplotypes composed of long arrays of satellite repeats and haplotypes lacking the same repeats. These results are in favor of the hypothesis that satellite repeat-based centromeres may originate from neocentromeres that lack repeats.
منابع مشابه
Repeatless and repeat-based centromeres in potato: implications for centromere evolution.
Centromeres in most higher eukaryotes are composed of long arrays of satellite repeats. By contrast, most newly formed centromeres (neocentromeres) do not contain satellite repeats and instead include DNA sequences representative of the genome. An unknown question in centromere evolution is how satellite repeat-based centromeres evolve from neocentromeres. We conducted a genome-wide characteriz...
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Centromeres are composed of long arrays of satellite repeats in most multicellular eukaryotes investigated to date. The satellite repeat-based centromeres are believed to have evolved from "neocentromeres" that originally contained only single- or low-copy sequences. However, the emergence and evolution of the satellite repeats in centromeres has been elusive. Potato (Solanum tuberosum) provide...
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In contrast to the gene-rich chromosome arms, the sequence of a typical plant centromere contains a large amount of repetitive DNA, most commonly large tracts of tandemly repeated sequences, or satellite DNA. However, the question of how this arrangement of sequences comes about is still a matter of active debate (reviewed in Malik and Henikoff, 2009). Centromere sequence evolves rapidly, possi...
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The centromere in eukaryotes is defined by the presence of a special histone H3 variant, CENH3. Centromeric chromatin consists of blocks of CENH3-containing nucleosomes interspersed with blocks of canonical H3-containing nucleosomes. However, it is not known how CENH3 is precisely deposited in the centromeres. It has been suggested that epigenetic modifications of the centromeric chromatin may ...
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عنوان ژورنال:
- Genetics
دوره 196 2 شماره
صفحات -
تاریخ انتشار 2014