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Identification and evaluation of PCR reference genes for host and pathogen in sugarcane-Sporisorium scitamineum interaction system.

Abstract：

BACKGROUND:Sugarcane (Saccharum L. plant) is an important crop for sugar and bio-energy production around the world. Among sugarcane diseases, smut caused by Sporisorium scitamineum is one of the major fungal diseases causing severe losses to the sugarcane industry. The use of PCR reference genes is essential to the normalization of data on gene expression involving the sugarcane-S. scitamineum interaction system; however, no report that addresses criteria in selecting these reference genes has been published to date. RESULTS:In this study, 10 sugarcane genes and eight S. scitamineum genes were selected as candidate PCR reference genes in the sugarcane-S. scitamineum interaction system. The stability and reliability of these 18 candidate genes were analyzed in smut-resistant (NCo376) and -susceptible (YC71-374) genotypes using the statistical algorithms geNorm, NormFinder, BestKeeper, and deltaCt method. Subsequently, the relative expression levels of the sugarcane chitinase I-3 gene and S. scitamineum chorismate mutase gene were determined to validate the applicability of these sugarcane and S. scitamineum PCR reference genes, respectively. We finally found that the acyl-CoA dehydrogenase gene (ACAD), serine/arginine repetitive matrix protein 1 gene (SARMp1), or their combination (ACAD + SARMp1) could be utilized as the most suitable reference genes for normalization of sugarcane gene expression in sugarcane bud tissues after S. scitamineum infection. Similarly, the inosine 5'-monophosphate dehydrogenase gene (S10), the SEC65-signal recognition particle subunit gene (S11), or their combination (S10 + S11) were suitable for normalization of S. scitamineum gene expression in sugarcane bud tissues. CONCLUSIONS:The PCR reference genes ACAD, SARMp1, S10, and S11 may be employed in gene transcriptional studies involving the sugarcane-S. scitamineum interaction system.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Huang N,Ling H,Liu F,Su Y,Su W,Mao H,Zhang X,Wang L,Chen R,Que Y

doi

10.1186/s12864-018-4854-z

subject

Has Abstract

pub_date

2018-06-19 00:00:00

pages

479

issue

issn

1471-2164

pii

10.1186/s12864-018-4854-z

journal_volume

pub_type

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Identification and evaluation of PCR reference genes for host and pathogen in sugarcane-Sporisorium scitamineum interaction system.