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Genome-wide Identification, Evolution and Transcriptome Analysis of GRAS Gene Family in Chinese Chestnut ()

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Journal Front Genet
Date 2023 Jan 23
PMID 36685835
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Abstract

GRAS transcription factors play an important role in regulating various biological processes in plant growth and development. However, their characterization and potential function are still vague in Chinese chestnut (), an important nut with rich nutrition and high economic value. In this study, 48 genes were identified in Chinese chestnut genome and phylogenetic analysis divided genes into nine subfamilies, and each of them has distinct conserved structure domain and features. Genomic organization revealed that tend to have a representative GRAS domain and fewer introns. Tandem duplication had the greatest contribution for the expansion based on the comparative genome analysis, and genes experienced strong purifying selection pressure based on the . Gene expression analysis revealed some members with potential functions in bud development and ovule fertility. genes with more homologous relationships with reference species had more -acting elements and higher expression levels. Notably, the lack of DELLA domain in members of the DELLA subfamily may cause de functionalization, and the differences between the three-dimensional structures of them were exhibited. This comprehensive study provides theoretical and practical basis for future research on the evolution and function of GRAS gene family.

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