期刊
PLANT CELL
卷 24, 期 11, 页码 4422-4436出版社
OXFORD UNIV PRESS INC
DOI: 10.1105/tpc.112.103630
关键词
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资金
- United Soybean Board [1249]
- National Science Foundation Plant Genome Research Program [IOS-0822258]
- Purdue Agricultural Research Program
- National Natural Science Foundation of China [91131005]
- Chinese Academy of Sciences
- Hong Kong Research Grants Council General Research Fund [468610]
- Lo Kwee Seong Biomedical Research Fund
- Lee Hysan Foundation
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1229956] Funding Source: National Science Foundation
Preferential accumulation of transposable elements (TEs), particularly long terminal repeat retrotransposons (LTR-RTs), in recombination-suppressed pericentromeric regions seems to be a general pattern of TE distribution in flowering plants. However, whether such a pattern was formed primarily by preferential TE insertions into pericentromeric regions or by selection against TE insertions into euchromatin remains obscure. We recently investigated TE insertions in 31 resequenced wild and cultivated soybean (Glycine max) genomes and detected 34,154 unique nonreference TE insertions mappable to the reference genome. Our data revealed consistent distribution patterns of the nonreference LTR-RT insertions and those present in the reference genome, whereas the distribution patterns of the nonreference DNA TE insertions and the accumulated ones were significantly different. The densities of the nonreference LTR-RT insertions were found to negatively correlate with the rates of local genetic recombination, but no significant correlation between the densities of nonreference DNA TE insertions and the rates of local genetic recombination was detected. These observations suggest that distinct insertional preferences were primary factors that resulted in different levels of effectiveness of purifying selection, perhaps as an effect of local genomic features, such as recombination rates and gene densities that reshaped the distribution patterns of LTR-RTs and DNA TEs in soybean.
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