Fresh leaves were collected, and leaf chloroplasts were extracted.. Zea mays

Popcorn originated from Central and South America and is an ancient type of maize. Popcorn is named for its ability to expand and burst after heating and produce relatively large maize flowers, and is now more and more popular with consumers as a nutrient-rich snack food. Considering that chloroplast genomes provide ideal information for species identification and evolution, the chloroplast of popcorn is sequenced and compared to obtain comprehensive information on its classification and evolution.