任何树种,在大量播种的苗圃中,即使圃地的土壤、地势、播种方法和管理措施都一样,仍然会出现一些生势异常突出、而不同于一般的苗木,这些个体可能是优良遗传特性表现的结果。因此,在苗圃中选择这类超级苗木进行栽培,寻找树木早期优势遗传和早期选种,是林木良种选育的重要途径。 In any nursery with large numbers of sown plants, even though the soil, topography, sowing methods and management practices of the nursery are still the same, there are still some outstanding abnormalities in appearance, which are different from those of the common seedlings. These individuals may be excellent genetic characteristics the result of. Therefore, in the nursery to choose such super seedlings for cultivation, looking for early genetic inheritance and early selection of trees is an important way for breeding elite trees.