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Genome Sequencing and Analysis of the Peanut B-Genome Progenitor (Arachis ipaensis)

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Relation http://oar.icrisat.org/10659/
http://dx.doi.org/10.3389/fpls.2018.00604
10.3389/fpls.2018.00604
 
Title Genome Sequencing and Analysis of the Peanut B-Genome Progenitor (Arachis ipaensis)
 
Creator Lu, Q
Li, H
Hong, Y
Zhang, G
Wen, S
Li, X
Zhou, G
Li, S
Liu, H
Liu, H
Liu, Z
Varshney, R K
Chen, X
Liang, X
 
Subject Groundnut
Genetics and Genomics
 
Description Peanut (Arachis hypogaea L.), an important leguminous crop, is widely cultivated in tropical and subtropical regions. Peanut is an allotetraploid, having A and B subgenomes that maybe have originated in its diploid progenitors Arachis duranensis (A-genome) and Arachis ipaensis (B-genome), respectively. We previously sequenced the former and here present the draft genome of the latter, expanding our knowledge of the unique biology of Arachis. The assembled genome of A. ipaensis is ~1.39 Gb with 39,704 predicted protein-encoding genes. A gene family analysis revealed that the FAR1 family may be involved in regulating peanut special fruit development. Genomic evolutionary analyses estimated that the two progenitors diverged ~3.3 million years ago and suggested that A. ipaensis experienced a whole-genome duplication event after the divergence of Glycine max. We identified a set of disease resistance-related genes and candidate genes for biological nitrogen fixation. In particular, two and four homologous genes that may be involved in the regulation of nodule development were obtained from A. ipaensis and A. duranensis, respectively. We outline a comprehensive network involved in drought adaptation. Additionally, we analyzed the metabolic pathways involved in oil biosynthesis and found genes related to fatty acid and triacylglycerol synthesis. Importantly, three new FAD2 homologous genes were identified from A. ipaensis and one was completely homologous at the amino acid level with FAD2 from A. hypogaea. The availability of the A. ipaensis and A. duranensis genomic assemblies will advance our knowledge of the peanut genome.
 
Publisher Frontiers Media
 
Date 2018-05
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10659/1/Genome%20Sequencing%20and%20Analysis.pdf
Lu, Q and Li, H and Hong, Y and Zhang, G and Wen, S and Li, X and Zhou, G and Li, S and Liu, H and Liu, H and Liu, Z and Varshney, R K and Chen, X and Liang, X (2018) Genome Sequencing and Analysis of the Peanut B-Genome Progenitor (Arachis ipaensis). Frontiers in Plant Science (TSI), 9 (604). pp. 1-15. ISSN 1664-462X