No evidence for parental age effects on offspring leukocyte telomere length in free-living Soay sheep.

No evidence for parental age effects on offspring leukocyte telomere length in free-living Soay sheep.
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没有证据表明父母的年龄对自由生活的绵羊中后代白细胞端粒长度的影响。

DOI:
10.1038/s41598-017-09861-3
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发表时间:
2017-08-30
期刊:
影响因子:
4.6
通讯作者:
Nussey DH
Nussey DH
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Froy H;Bird EJ;Wilbourn RV;Fairlie J;Underwood SL;Salvo-Chirnside E;Pilkington JG;Bérénos C;Pemberton JM;Nussey DH

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在人类中,父亲的受孕年龄(PAC)对后代白细胞端粒长度(LTL)的影响已经得到了很好的证实,年长的父亲被认为会在精子中将更长的端粒传给后代。很少有研究在其他物种中寻找PAC效应,但有人假设这种效应在精子竞争和生产水平较高的一夫多妻物种中会加剧。我们测试的母亲(MAC)和父亲的年龄在概念上的后代LTL的Soay羊,原始品种经历强烈的精子竞争的影响。我们使用qPCR来测量相对端粒长度在389血液样本(n = 318个人)收集从一个未受管理的羊在圣基尔达,其中个人的年龄和亲子关系是已知的。我们没有发现任何证据表明,无论是MAC或PAC与LTL在整个年龄范围内的后代,或只考虑年轻的羔羊(n = 164)。这是第一个研究测试父母的年龄对后代LTL在野生哺乳动物种群的影响,其结果与许多人类研究发现的PAC效应,以及一夫多妻制物种中更强的PAC效应的预测结果形成对比。
In humans, the effect of paternal age at conception (PAC) on offspring leukocyte telomere length (LTL) is well established, with older fathers thought to pass on longer telomeres to their offspring in their sperm. Few studies have looked for PAC effects in other species, but it has been hypothesised that the effect will be exacerbated in polygamous species with higher levels of sperm competition and production. We test for maternal (MAC) and paternal age at conception effects on offspring LTL in Soay sheep, a primitive breed experiencing strong sperm competition. We use qPCR to measure relative telomere length in 389 blood samples (n = 318 individuals) collected from an unmanaged population of sheep on St Kilda, where individual age and parentage are known. We find no evidence that either MAC or PAC are associated with LTL in offspring across the age range, or when considering only young lambs (n = 164). This is the first study to test for parental age effects on offspring LTL in a wild mammal population, and the results contrast with the findings of numerous human studies that find a PAC effect, as well as predictions of a stronger PAC effect in polygamous species.
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