Genome-Wide Identification and Expression Analysis of Gene in Response to GA and SL Related to Plant Height in Banana.

Dwarfing is one of the common phenotypic variations in asexually reproduced progeny of banana, and dwarfed banana is not only windproof and anti-fallout but also effective in increasing acreage yield. As a key gene in the strigolactone signalling pathway, () plays an important role in the regulation of the height of plants. In order to gain insight into the function of the banana gene, this study conducted genome-wide identification of banana gene based on the , and genome database. Analysis of gene expression under high temperature, low temperature and osmotic stress based on transcriptome data and RT-qPCR was used to analyse gene expression in different tissues as well as in different concentrations of GA and SL treatments. In this study, we identified three , three and two genes in banana. Phylogenetic tree analysis showed that D53 Musa are equally related to D53 Asparagales and Poales. Both high and low-temperature stresses substantially reduced the expression of the gene, but osmotic stress treatments had less effect on the expression of the gene. GR24 treatment did not significantly promote the height of the banana, but the expression of the gene was significantly reduced in roots and leaves. GA treatment at 100 mg/L significantly promoted the expression of the gene in roots, but the expression of this gene was significantly reduced in leaves. In this study, we concluded that responds to GA and SL treatments, but "Yinniaijiao" dwarf banana may not be sensitive to GA and SL.