field-grownCOCA²⁰⁵⁷¹⁶ 例句 Using field-grown plants of lines and F1- F2 hybrids of barley as experimental materials, a procedure of microspore culture in vitro with high regeneration was established by technique optimization. 以大麦 F1、 F2代为供体材料，通过技术优化，建成了大麦小孢子培养高频再生技术程序。 cnki