Genome-Wide Identification and Expression Profiling of the MADS-Box Gene Family in Lavandula Angustifolia

A team of researchers from Yili Normal University has conducted a comprehensive study on the MADS-box gene family in Lavandula angustifolia, an economically significant aromatic plant. The study, published in BMC Genomics, identified 173 MADS-box genes in L. angustifolia, categorized into type I and type II based on phylogenetic comparisons with Arabidopsis thaliana. The MIKC subgroup was further subdivided into 12 subclasses, with distinct conserved motifs and exon-intron configurations specific to each subgroup. The research demonstrated that type II MADS-box genes exhibited higher expression levels with pronounced tissue-specific and developmental stage-specific expression patterns compared to type I genes. Many type II genes displayed significant associations with floral organogenesis, floral transition, and abiotic stress responses, underscoring their essential roles in reproductive development and environmental adaptability in L. angustifolia.

Key Takeaways:

• The study identified 173 MADS-box genes in Lavandula angustifolia, categorized into type I and type II based on phylogenetic comparisons with Arabidopsis thaliana.
• The MIKC subgroup of MADS-box genes was further subdivided into 12 subclasses, with distinct conserved motifs and exon-intron configurations specific to each subgroup.
• Type II MADS-box genes exhibited higher expression levels with pronounced tissue-specific and developmental stage-specific expression patterns compared to type I genes.
• Many type II genes displayed significant associations with floral organogenesis, floral transition, and abiotic stress responses.
• The research demonstrated that Whole Genome Duplication (WGD) and segmental duplications were major contributors to MIKC gene family expansion in L. angustifolia.
• The study highlights the significant expansion of the MIKC subgroup driven primarily by WGD and segmental duplications.
• The research established a robust molecular basis for further functional analysis and genetic improvement of aromatic plants.

Statistics:

• 173 MADS-box genes were identified in Lavandula angustifolia.
• 26 type I MADS-box genes (Ma) and 10 type I MADS-box genes (Mg) were identified in L. angustifolia.
• 125 type II MADS-box genes (MIKC) and 12 type II MADS-box genes (MIKC*) were identified in L. angustifolia.
• 12 subclasses were identified within the MIKC subgroup.
• Type II MADS-box genes exhibited a 3-fold higher expression level compared to type I genes.

Sources:

• Genome-wide identification and expression profiling of the MADS-box gene family in Lavandula angustifolia. BMC Genomics, 2025;26(1):911.
• BioMed Central - www.biomedcentral.com/; BMC Genomics - www.biomedcentral.com/bmcgenomics/
• Yili Normal University, College of Biological Sciences and Technology, Yining, 835000, People's Republic of China.