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Article Abstract
The prostrate cultivars of ground-cover chrysanthemum have been used in landscape gardening due to their small stature, large crown width and strong branching ability. qRT-PCR is a rapid and powerful tool for gene expression analysis, while its accuracy highly depends on the stability of reference genes. The paucity of authentic reference genes presents a major hurdle in understanding the genetic regulators of prostrate architecture. Therefore, in order to reveal the regulatory mechanism of prostrate growth of chrysanthemum stems, here, stable reference genes were selected for expression analysis of key genes involved in shoot development and graviresponse. Based on transcriptome data, eleven reference genes with relatively stable expression were identified as the candidate reference genes. After the comprehensive analysis of the stability of these reference genes with four programs (geNorm, NormFinder, BestKeeper and RefFinder), we found that TIP41 was the most stable reference gene in all of the samples. SAND was determined as a superior reference gene in different genotypes and during the process of shoot development. The optimal reference gene for gravitropic response was PP2A-1. In addition, the expression patterns of LA1 and PIN1 further verified the reliability of the screened reference genes. These results can provide more accurate and reliable qRT-PCR normalization for future studies on the expression patterns of genes regulating plant architecture of chrysanthemums.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6880974 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0225241 | PLOS |
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