mobile genetic element是什么意思

用法例句

7 fine families of Pines elliottii were selected from investigation on their chest diameter,volulne,infection rate and principal component genetic index.

对４个省３０个家系在闽候南屿林场进行子代测定，通过多年观测，以胸径、材积、感病率３个调查性 状为测度，用主成分遗传指数得分值为多性状综合指标，评选出７个优良家系，其材积遗传增益为１２。