Background Prunus Cistena is an excellent color leaf configuration tree for urban landscaping in the world, which has purplish red leaves, light pink flowers, plant shape and high ornamental value. Genomic resources for P. Cistena are scarce, and a clear phylogenetic and evolutionary history for this species has yet to be elucidated. Here, we sequenced and analyzed the complete chloroplast (cp) genome of P. Cistena and compared it with related species of Prunus genus based on chloroplast genome.Results The complete chloroplast genome of P. Cistena was 157,935 bp in length, which had a typical tetrad structure. The overall GC content was 36.72%, while IR regions displayed a higher GC content than LSC and SSC regions. It encoded 130 genes, including 85 protein-coding genes, 37 tRNA genes, and 8 rRNA genes. The ycf3 and clpP genes had two introns; the longest intron was trnK-UUU gene in the LSC region. There were 253 SSRs, and the mononucleotide SSRs were the most abundant. The chloroplast sequences and gene arrangements of P. Cistena were conserved, which overall structure and gene order were similar to other Prunus species. The atpE, ccsA, petA, rps8 and matK gene had significant positive selection in Prunus species. P. Cistena had a close evolutionary relationship with the P. jamasakura. The coding region and IR region were more conserved than noncoding region, and the cpDNA sequences highly conserved throughout the genus Prunus.Conclusions The current genomic datasets provide valuable information for further species identification, evolution, and phylogenetic research of genus Prunus.

No abstract

IntroductionChicken eggs are a favorite food and the major consumed eggs worldwide 1) . They contain numerous nutritional components, such as proteins, lipids, minerals, amino acids, and vitamins 1) . Currently, many studies have confirmed that the nutrient profiles of eggs could be modified by different hen breeds 2) , feeds 3) , and husbandry systems (free range or indoor) 2) . In China s market, there are various types of chicken eggs available with different origins, quality and also retail prices. For instance, Yunan Nixi chicken eggs, being an unique eggs in the Yunnan area with the chicken name derived from that of the Nixi Township in Shangri-La, are usually sold at a 5-fold higher price than the ordinary eggs. In addition, silky fowl s eggs are another high priced chicken eggs in China have a long eating history and have been credited with famous medicinal and health-promoting properties 4) . Determine the detailed nutritional characteristics of different chicken eggs will provide references for the evaluation of quality and commercial value of the eggs.Lipids are one of the most important nutrients of chicken eggs that are present in egg yolk (65％ dry weight percentage) and include approximately 62％ triacylglycerol (TG) , 33％ phospholipid (PL) , and less than 5％ cholesterol 5) .