Establishment of comparative transcriptome dataset related to nitrogen use efficiency in melon

Area of Science:

• Plant Science
• Genomics
• Agricultural Science

Background:

• Nitrogen use efficiency (NUE) is vital for melon (Cucumis melo var. saccharinus) yield and resource management.
• Understanding the genetic basis of NUE is essential for developing improved crop varieties.

Purpose of the Study:

• To investigate the molecular mechanisms of differential nitrogen use efficiency (NUE) in melon cultivars.
• To identify core differentially expressed genes (DEGs) associated with NUE under varying nitrogen conditions.

Main Methods:

• Transcriptome profiling using Illumina RNA-seq on 24 melon leaf samples from four inbred lines under high-nitrogen (HN) and low-nitrogen (LN) conditions.
• Annotation of 26,222 expressed genes and construction of the longest transcript dataset.
• Differential expression analysis to identify 824 core DEGs linked to NUE, with validation of six DEGs by RT-qPCR.

Main Results:

• Transcriptomic data revealed clear separation between melon germplasms and nitrogen treatments.
• Identified 824 core differentially expressed genes consistently associated with nitrogen use efficiency (NUE) across multiple comparisons.
• RT-qPCR validation confirmed the accuracy of RNA-seq results for selected genes.

Conclusions:

• The study provides valuable molecular resources for enhancing NUE in melon.
• Findings can aid in reducing fertilizer application and increasing melon productivity.
• The identified DEGs offer targets for genetic improvement of NUE in melon breeding programs.