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Gene duplication and genetic innovation in cereal genomes

Journal Article · · Genome Research
 [1];  [2];  [3];  [4];  [5];  [3];  [3]
  1. Univ. of Georgia, Athens, GA (United States); DuPont Pioneer, Johnston, IA (United States); OSTI
  2. Univ. of Georgia, Athens, GA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  3. Univ. of Georgia, Athens, GA (United States)
  4. Univ. of Georgia, Athens, GA (United States); Hebei United Univ. (China)
  5. Univ. of Georgia, Athens, GA (United States); Shihezi Univ. (China)

Organisms continuously require genetic variation to adapt to fluctuating environments, yet major evolutionary events are episodic, making the relationship between genome evolution and organismal adaptation of considerable interest. Here, by genome-wide comparison of sorghum, maize, and rice SNPs, we investigated reservoirs of genetic variations with high precision. For sorghum and rice, which have not experienced whole-genome duplication in 96 million years or more, tandem duplicates accumulate relatively more SNPs than paralogous genes retained from genome duplication. However, maize, which experienced lineage-specific genome duplication and has a relatively larger supply of paralogous duplicates, shows SNP enrichment in paralogous genes. The proportion of genes showing signatures of recent positive selection is higher in small-scale (tandem and transposed) than genome-scale duplicates in sorghum, but the opposite is true in maize. A large proportion of recent duplications in rice are species-specific; however, most recent duplications in sorghum are derived from ancestral gene families. A new retrotransposon family was also a source of many recent sorghum duplications, illustrating a role in providing variation for genetic innovations. This study shows that diverse evolutionary mechanisms provide the raw genetic material for adaptation in taxa with divergent histories of genome evolution.

Research Organization:
Univ. of California, Oakland, CA (United States); USDOE Joint Genome Institute (JGI), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1625637
Journal Information:
Genome Research, Journal Name: Genome Research Journal Issue: 2 Vol. 29; ISSN 1088-9051
Publisher:
Cold Spring Harbor Laboratory PressCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (23)

Correction to: Common metabolic networks contribute to carbon sink strength of sorghum internodes: implications for bioenergy improvement journal December 2019
Additional file 10 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 11 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 12 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency image January 2020
Additional file 13 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency image January 2020
Additional file 14 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency image January 2020
Additional file 15 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency image January 2020
Additional file 16 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency image January 2020
Additional file 17 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency image January 2020
Additional file 1 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 2 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 3 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 4 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 5 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 6 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 7 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 8 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Additional file 9 of Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency dataset January 2020
Allelochemicals targeted to balance competing selections in African agroecosystems journal December 2019
Disequilibrium evolution of the Fructose-1,6-bisphosphatase gene family leads to their functional biodiversity in Gossypium species journal June 2020
Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiency journal May 2020
Common metabolic networks contribute to carbon sink strength of sorghum internodes: implications for bioenergy improvement journal November 2019
Integrative Analysis of the Wheat PHT1 Gene Family Reveals A Novel Member Involved in Arbuscular Mycorrhizal Phosphate Transport and Immunity journal May 2019

Figures / Tables (7)


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