The efficiency of indirect selection of 300-EPD by 8-SAW as the secondary trait was 1.2174, 1.4460 and 1.0826 times as large as individual selection, family selection and combination selection, respectively.

• 利用8周龄血清白蛋白百分含量作为辅助性状对300日龄产蛋量进行间接选择；其间接选择效率为个体选择的1.；2174倍；为家系选择的1