Transcriptome Analysis Reveals Genes Associated with Kernel Size in Apricots Cultivated for Kernel Consumption (Prunus Armeniaca×Prunus Sibirica)
Seed size is an important component of overall seed yield trait, and apricots cultivated for consumable kernels produce kernels that are large and sweet. The molecular mechanism of kernel development in these consumption apricots, however, remains unclear. We measured kernel weight, kernel length, kernel width, and kernel thickness and investigated the transcriptome profiles of kernel consumption apricots ( Prunus armeniaca × Prunus sibirica ) at six different developmental stages. The results of phenotypic analysis showed that rapid development of kernel size occurred from 15 to 45 days after flowering (DAF), and the kernel coat size almost to the maximum at 45 DAF, suggesting that the kernel coat size is one of the most important factors that determine overall kernel size. A total of 8,108 differentially expressed genes (DEGs) were identified, and a weighted gene co-expression network analysis revealed that three of 14 modules were strongly correlated with the kernel siz. One hub gene (PaLWMG0300012495.01), which is homologous with the EMBRYO DEFECTIVE ( EMB ) in the turquoise module, was identified. In addition, the DEGs related to kernel size in the phytohormones biosynthesis and signal transduction pathways, ubiquitin-proteasome pathway, G-protein signaling, mitogen-activated protein kinase signaling, and HAIKU pathway were analyzed, which were considered to be important regulators of kernel size. Our findings provide new insights into the molecular mechanisms underlying the regulation of kernel size in kernel consumption apricots
Year of publication: |
[2022]
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Authors: | Lin, Wang ; Bao, Wenquan ; Xu, Wanyu ; Huang, Mengzhen ; Zhu, Gaopu ; Zhao, Han ; Chen, Chen ; Bai, Haikun ; Chen, Junxing ; Liu, Huimin ; Wuyun, Ta-na |
Publisher: |
[S.l.] : SSRN |
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