Inter-annual and spatial climatic variability have led to a balance between local fluctuating selection and wide-range directional selection in a perennial grass species.
Inter-annual and spatial climatic variability have led to a balance between local fluctuating selection and wide-range directional selection in a perennial grass species.
复制标题
年际和空间气候变化导致了多年生草种的局部波动选择和大范围定向选择之间的平衡。
DOI：
10.1093/aob/mcab057
复制
发表时间：
2021
期刊：
影响因子：
4.2
通讯作者：
Keep T
中科院分区：
文献类型：
--
作者：
Keep T
背景和目的植物种群在特定的气候条件下的持续生存需要表型适应，其基础是适应位点的等位基因的特定组合。自然植物种群中适应性基因座的等位基因多样性水平决定了其进化潜力，特别是适应气候变化的潜力。因此，研究有助于维持种群适应性多样性的环境因素是值得的。在适应性位点的种群内等位基因多样性可以部分地驱动的平均气候在人口situ.MethodsThe气候的时间平均值和变异性对种群内等位基因多样性的影响puplum适应性数量性状基因座（QTL）进行了评估，使用385个自然种群ofLolium perenne（多年生黑麦草）收集的权利在欧洲各地。7个适应性性状有关的生殖物候和营养生长潜力的季节性，平均人口内的等位基因多样性在主要QTL（HeA）computed.Key ResultsSignificant关系被发现heA这些性状和时间的平均值和当地气候的变化。这些关系是一致的功能生态学theorety.ConclusionsResults表明，当地气候的时间变化可能导致波动的方向选择，这有助于维持适应位点的等位基因多样性，从而进一步适应的潜力。
Background and AimsThe persistence of a plant population under a specific local climatic regime requires phenotypic adaptation with underlying particular combinations of alleles at adaptive loci. The level of allele diversity at adaptive loci within a natural plant population conditions its potential to evolve, notably towards adaptation to a change in climate. Investigating the environmental factors that contribute to the maintenance of adaptive diversity in populations is thus worthwhile. Within-population allele diversity at adaptive loci can be partly driven by the mean climate at the population site but also by its temporal variability.MethodsThe effects of climate temporal mean and variability on within-population allele diversity at putatively adaptive quantitative trait loci (QTLs) were evaluated using 385 natural populations ofLolium perenne(perennial ryegrass) collected right across Europe. For seven adaptive traits related to reproductive phenology and vegetative potential growth seasonality, the average within-population allele diversity at major QTLs (HeA) was computed.Key ResultsSignificant relationships were found betweenHeAof these traits and the temporal mean and variability of the local climate. These relationships were consistent with functional ecology theory.ConclusionsResults indicated that temporal variability of local climate has likely led to fluctuating directional selection, which has contributed to the maintenance of allele diversity at adaptive loci and thus potential for further adaptation.