Genome-wide Identification and Bioinformatics Analysis of GRAS Gene Family in Maize
GRAS gene family is a kind of transcription factor widely distributed in plants,which plays an important role in plant growth and development,biological and abiotic stress,light signal,hormone signal response and other processes.The physicochemical properties,chromosome localization,phylogeny and cis-acting elements of GRAS gene family in maize were analyzed.The results showed that a total of 49 ZmGRAS genes were identified in the whole genome of maize,which were unevenly distributed on chromosomes 1 to 10,and the physicochemical properties of the encoded proteins were very different,which might play a role in different microenvironments.Phylogenetic analysis classified GRAS proteins into 8 subfamilies,which might play important roles in regulating growth and development and stress response.The promoter regions of GRAS genes in maize contained variety of cis-acting elements such as hormone response,light response and stress response,which might be involved in important response such as hormone and stress.Collinear analysis showed that genes with collinear relationships might be the result of replication of chromosome segments,and belonged to the same subfamily with similar structure and function.The identification and analysis of GRAS gene family in maize provided the basis for further research on the function of GRAS genes and their response mechanisms to stress in maize.
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