育苗是果菜栽培的主要环节之一。在长期生产实践中,我国菜农早就注意到菜苗素质对产量的影响,并根据菜苗的生态、形态提出种种与秧苗质量有关的描述。由于仅限于形态描述,无法定量评定秧苗的优劣程度,并在认识上有时不可避免地会出现一定程度的片面性。在科研中,数量性状指标一 Nursery is one of the main aspects of fruit and vegetable cultivation. In the long-term production practice, the vegetable farmers in China have long noticed the impact of the quality of vegetable seedlings on the yield and put forward various descriptions related to the quality of the seedlings according to the ecological and morphological characteristics of the vegetable seedlings. Because of the limited description of morphology, it is not possible to quantitatively assess the advantages and disadvantages of seedlings and, at some level of one-sidedness, unavoidably, in our understanding. In research, quantitative trait index one