室内直观鉴定种子真实性,往往受到种子本身外在特征表现范围的限制。有的种子,如某些杂交籼稻,虽可利用幼苗(芽)显现某个指示基因的特点加以鉴定,但是对不具备指示基因的种子就无能为力了。譬如,杂交粳稻“黎优57”的杂交种与不育系黎明A,无论从穗部、籽粒还是从幼苗的形态特征上都无从鉴别,而生产上又恰恰在杂交种及三系种子之间容易发生差错,室内鉴定种子真实性的工作日显重要。 Indoor visual identification of seed authenticity is often limited by the extent of the external characteristics of the seed itself. Some seeds, such as some hybrid indica rice, can be identified by using seedlings (shoots) to show the characteristics of an indicator gene, but can not do anything for seeds that do not have the indicator gene. For example, hybrid rice “Liyou 57” and sterile line Liming A are indistinguishable from the morphological characteristics of spike, grain or seedling, and the production is just between hybrids and three lines of seeds Prone to error, indoor identification of authenticity of the working day is important.