参见近交系数。
从近交系数增量考虑，育种群公羊使用年限最多不应超过4年。
Useful life of breeding flock ram should not surpass 4 years according to inbreeding increment.
父系以近交法建系，近交系数达38—39%，母系以家系闭锁世代选择法建系。
The paternal line was developed from inbreeding, its inbreeding coefficient was 38-39%, While the maternal line was selected from generation among closed flock.
尿素氮和球蛋白含量在系统选择中随近交系数的上升而下降，血红素含量却上升。
The contents of ureotelism and globulin increased and hemoglobin decreased with inbreeding coefficient in systematic breeding.
尿素氮和球蛋白含量在系统选择中随近交系数的上升而下降，血红素含量却上升。
The contents of ureotelism and globulin increased and hemoglobin decreased with inbreeding coefficient in systematic breeding.
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