C+42913T and C+53327T sites were present in the same haplotype block which proved that C+53327T was a genetic marker for the age of first egg and duration of broodiness, too.

• 位点C+42913T与C+53327T构成的单倍型块与性状的分析结果进一步证实位点C+53327T与开产日龄、就巢持续时间相关的遗传标记。