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５１９９是一抽穗期比一般早熟大麦品种早２０ｄ左右的特早熟六棱皮大麦，对４个杂交组合６个世代（Ｆ１、Ｆ２、Ｂ１、Ｂ２、Ｐ１、Ｐ２）的抽穗期挂牌观察分析结果表明，大麦的出苗至抽穗天数及有效积温至少受３对效应大小不同、且存在互作效应的主效基因控制，迟穗性对早穗性呈部分显性，基因累加效应起主导作用。５１９９的特早穗性受３对存在隐性上位性效应的隐性基因控制（ｅ１ｅ１为隐性上位性基因），与其它主要目标性状无明显的负向关联。
5199 is a very early-maturing six-rowed barley with a heading date about 20 days earlier than that of the normal early-maturing barley varieties. The results of the heading date analysis of the heading date of the four cross combinations (F1, F2, B1, B2, P1 and P2) , Barley seedling emergence to heading days and effective accumulated temperature at least three pairs of effects of different sizes, and there are major effects of the interaction of the main gene control, late panicle was part of the characteristics of early panicle dominant, gene accumulation played a leading role. The special early panicle of 5199 was controlled by 3 recessive epistatic recessive genes (e1e1 was a recessive epistatic gene), which showed no significant negative correlation with other major target traits.