The paternal line was developed from inbreeding, its inbreeding coefficient was 38-39%, While the maternal line was selected from generation among closed flock.

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。

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The paternal line was developed from inbreeding, its inbreeding coefficient was 38-39%, While the maternal line was selected from generation among closed flock.

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。

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