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Genome-wide sequencing of longan (Dimocarpus longan Lour.) provides insights into molecular basis of its polyphenol-rich characteristics

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Relation http://oar.icrisat.org/10118/
http://dx.doi.org/10.1093/gigascience/gix023
10.1093/gigascience/gix023
 
Title Genome-wide sequencing of longan (Dimocarpus longan Lour.) provides insights into molecular basis of its polyphenol-rich characteristics
 
Creator Lin, Y
Min, J
Lai, R
Wu, Z
Chen, Y
Yu, L
Cheng, C
Jin, Y
Tian, Q
Liu, Q
Liu, W
Zhang, C
Lin, L
Zhang, D
Thu, M
Zhang, Z
Liu, S
Zhong, C
Fang, X
Wang, J
Yang, H
Varshney, R K
Yin, Y
Lai, Z
 
Subject Genetics and Genomics
 
Description Longan (Dimocarpus longan Lour.), an important subtropical fruit in the family Sapindaceae, is grown in more than 10 countries. Longan is an edible drupe fruit and a source of traditional medicine with polyphenol-rich traits. Tree size, alternate bearing, and witches' broom disease still pose serious problems. To gain insights into the genomic basis of longan traits, a draft genome sequence was assembled. The draft genome (about 471.88 Mb) of a Chinese longan cultivar, “Honghezi,” was estimated to contain 31 007 genes and 261.88 Mb of repetitive sequences. No recent whole-genome-wide duplication event was detected in the genome. Whole-genome resequencing and analysis of 13 cultivated D. longan accessions revealed the extent of genetic diversity. Comparative transcriptome studies combined with genome-wide analysis revealed polyphenol-rich and pathogen resistance characteristics. Genes involved in secondary metabolism, especially those from significantly expanded (DHS, SDH, F3΄H, ANR, and UFGT) and contracted (PAL, CHS, and F3΄5΄H) gene families with tissue-specific expression, may be important contributors to the high accumulation levels of polyphenolic compounds observed in longan fruit. The high number of genes encoding nucleotide-binding site leucine-rich repeat (NBS-LRR) and leucine-rich repeat receptor-like kinase proteins, as well as the recent expansion and contraction of the NBS-LRR family, suggested a genomic basis for resistance to insects, fungus, and bacteria in this fruit tree. These data provide insights into the evolution and diversity of the longan genome. The comparative genomic and transcriptome analyses provided information about longan-specific traits, particularly genes involved in its polyphenol-rich and pathogen resistance characteristics.
 
Publisher Oxford University Press
 
Date 2017
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10118/1/Genome-wide%20sequencing%20of%20longan%20%28Dimocarpus.pdf
Lin, Y and Min, J and Lai, R and Wu, Z and Chen, Y and Yu, L and Cheng, C and Jin, Y and Tian, Q and Liu, Q and Liu, W and Zhang, C and Lin, L and Zhang, D and Thu, M and Zhang, Z and Liu, S and Zhong, C and Fang, X and Wang, J and Yang, H and Varshney, R K and Yin, Y and Lai, Z (2017) Genome-wide sequencing of longan (Dimocarpus longan Lour.) provides insights into molecular basis of its polyphenol-rich characteristics. GigaScience, 6 (5). pp. 1-14. ISSN 2047-217X