Functional And Structural Evolution Of Peanut Oil Synthesis Gene Family

Peanut(Arachis hypogaea)is an important oil and food crop.The completion of genome sequencing provides important data support for the study of the structure and function of peanut oil synthesis gene at the genomic level.Here,the main research object of this study is the members of the family of oleoresin two kinds of tetraploid peanut and two kinds of wild peanut,and the multigenome comparative analysis was carried out in soybean,alfalfa and grape.Taking 621 oil synthesis genes published in Arabidopsis as reference sequence,we identified the number of family members of the oil synthesis gene family in the selected genome.Tetraploid peanut cultivated species has the most oil synthesis genes(1535),followed by tetraploid wild peanuts(1422),wild peanut BB(829),and wild peant AA(757).By using genome homology comparison and collinear analysis,we inferred the gene sets and collinearity lists of different genome doubling events in each species.The multiple events,the influenced on the number of oil synthesis gene families and the loss rate of oil synthesis related genes in different species were determined.The relative loss rate of tetraploid peanut wild species was 39.47%,and a large number of repeat gene loss was found.The results show that the genes related to oil synthesis in different species genome have been kept in a stable range.The phylogenetic tree and similarity comparison showed that the evolution of peanut oil synthesis-related genes was conservative,and some of them were still evolving fast.The structure and protein domain of oil synthesis genes in peanut genome were predicted and analyzed.The GO annotation and function classification were carried out.It was found that the structure difference between the oil synthesis genes in the species was large,which may explain function variation.The present research revealed the information of the number,similarity,structure,and function of the oil synthesis genes in different peanuts,providing genomic support for peanut improvement.Figure 19;Table 9;Reference 78...