Evolution and expression analyses of the MADS-box gene family in Brassica napus

PloS One
Yun-Wen WuHai Du

Abstract

MADS-box transcription factors are important for plant growth and development, and hundreds of MADS-box genes have been functionally characterized in plants. However, less is known about the functions of these genes in the economically important allopolyploid oil crop, Brassica napus. We identified 307 potential MADS-box genes (BnMADSs) in the B. napus genome and categorized them into type I (Mα, Mβ, and Mγ) and type II (MADS DNA-binding domain, intervening domain, keratin-like domain, and C-terminal domain [MIKC]c and MIKC*) based on phylogeny, protein motif structure, and exon-intron organization. We identified one conserved intron pattern in the MADS-box domain and seven conserved intron patterns in the K-box domain of the MIKCc genes that were previously ignored and may be associated with function. Chromosome distribution and synteny analysis revealed that hybridization between Brassica rapa and Brassica oleracea, segmental duplication, and homologous exchange (HE) in B. napus were the main BnMADSs expansion mechanisms. Promoter cis-element analyses indicated that BnMADSs may respond to various stressors (drought, heat, hormones) and light. Expression analyses showed that homologous genes in a given subfamily or sister pair...Continue Reading

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Datasets Mentioned

BETA
PRJNA358784

Methods Mentioned

BETA
RNA-seq

Software Mentioned

PlantCARE
BLASTP
PROSITE
Java Treeview
Genoscope
MEGA
Cluster
Mapchart
MEME
CoGe

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