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Amplification and adaptation of centromeric repeats in polyploid switchgrass species

Journal Article · · New Phytologist
DOI:https://doi.org/10.1111/nph.15098· OSTI ID:1543997
 [1];  [2];  [3];  [2];  [4];  [5];  [6];  [7];  [8];  [9];  [2]
  1. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA; Institute of Food Crops, Provincial Key Laboratory of Agrobiology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014 China
  2. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA; Department of Plant Biology, Department of Horticulture, Michigan State University, East Lansing MI 48824 USA
  3. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA; Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Key Laboratory of Plant Functional Genomics of Ministry of Education, Yangzhou University, Yangzhou 225009 China
  4. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA; College of Bioscience and Biotechnology, Beijing Forestry University, Beijing 100083 China
  5. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA
  6. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA; School of Life Sciences, Jiangsu Normal University, Xuzhou 221116 China
  7. Department of Horticulture, University of Wisconsin-Madison, Madison WI 53706 USA; Departmento de Biologia, Universidade Federal de Lavras, Lavras MG 37200 Brazil
  8. Dairy Forage Research Center, Agricultural Research Service, USDA, Madison WI 53706 USA
  9. Joint Genome Institute, Walnut Creek CA 94598 USA; HudsonAlpha Institute for Biotechnology, Huntsville AL 35806 USA

Centromeres in most higher eukaryotes are composed of long arrays of satellite repeats (Henikoff et al., 2001; Jiang et al., 2003). In addition, centromeres in the same plant or animal species are often dominated by a single satellite repeat family. For example, human centromeres are composed exclusively of the c. 171-bp alpha satellite repeats (Willard & Waye, 1987; Miga et al., 2014). Similarly, each of the five centromeres of the model plant Arabidopsis thaliana (2n = 2x = 10) contains several megabases (Mb) of a 178-bp satellite repeat (Maluszynska & Heslop-Harrison, 1991; Murata et al., 1994; Jackson et al., 1998; Nagaki et al., 2003). Nucleosomes in centromeres are defined by the presence of cenH3 (CENP-A in mammalian species), a centromere-specific H3 variant. The satellite repeats in a single centromere often expand to several megabases and are associated with both cenH3 nucleosomes and pericentromeric H3 nucleosomes (Schueler et al., 2001; Jin et al., 2004; Shibata & Murata, 2004; Zhang et al., 2008). Nevertheless, such satellite repeats are intriguingly restricted to the centromeric regions and do not spread to interstitial or telomeric regions of the chromosomes.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-05CH11231
OSTI ID:
1543997
Journal Information:
New Phytologist, Vol. 218, Issue 4; ISSN 0028-646X
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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