Mutation rate analysis via parent-progeny sequencing of the perennial peach. II. No evidence for recombination-associated mutation.

Mutation rate analysis via parent-progeny sequencing of the perennial peach. II. No evidence for recombination-associated mutation.
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通过多年生桃子的亲子测序进行突变率分析。

DOI:
10.1098/rspb.2016.1785
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发表时间:
2016-10-26
期刊:
Proceedings. Biological sciences
影响因子:
--
通讯作者:
Hurst LD
Hurst LD
中科院分区:
其他
文献类型:
--
作者:
Wang L;Zhang Y;Qin C;Tian D;Yang S;Hurst LD

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突变率和重组率在物种之间和基因组内的区域之间变化。这些变异形式的决定因素是什么?先前的证据表明,重组可能是致突变的,在重组断点附近有过量的新突变。由于驯化的类群比野生类群具有更高的重组率,我们预计驯化类群的突变率也会提高。在这里,我们在驯化和野生桃中使用亲子测序来询问(i)重组是否是诱变的,以及(ii)驯化桃是否比野生桃具有更高的重组率。我们没有发现任何证据表明驯化桃的重组率增加,也没有发现重组事件附近的突变率增加。如果重组是致突变的,在这个分类群,效果太弱,不能检测到我们的分析。虽然缺乏重组相关突变可能解释了缺乏重组杂合性相关的桃,我们警告这样的解释。
Mutation rates and recombination rates vary between species and between regions within a genome. What are the determinants of these forms of variation? Prior evidence has suggested that the recombination might be mutagenic with an excess of new mutations in the vicinity of recombination break points. As it is conjectured that domesticated taxa have higher recombination rates than wild ones, we expect domesticated taxa to have raised mutation rates. Here, we use parent–offspring sequencing in domesticated and wild peach to ask (i) whether recombination is mutagenic, and (ii) whether domesticated peach has a higher recombination rate than wild peach. We find no evidence that domesticated peach has an increased recombination rate, nor an increased mutation rate near recombination events. If recombination is mutagenic in this taxa, the effect is too weak to be detected by our analysis. While an absence of recombination-associated mutation might explain an absence of a recombination–heterozygozity correlation in peach, we caution against such an interpretation.
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