Changes in a second gene that is active during seed development help to transform the stony, mineral-encased seeds of teosinte into the softer, more exposed kernels of maize.

• 第二个发生改变的基因活跃于种子发育时期，使得坚硬且被矿物质包围的大刍草种子，转变成柔软而容易取得的玉米子。