Laccetti Lucrezia, Carta Angelino, Barone Lumaga Maria Rosaria, Frachon Léa, Scopece Giovanni
Department of Biology, University of Naples Federico II, Naples, Italy.
Department of Biology, University of Pisa, Pisa, Italy.
Commun Biol. 2025 Aug 14;8(1):1225. doi: 10.1038/s42003-025-08673-w.
Seed traits underlying germination, by determining the environment experienced by plants throughout their lifetime, can play a key role in shaping plants' adaptive strategies. However, the genomic bases of adaptation in seed traits and its link with local biotic and abiotic environments remain largely unexplored. Here, we used a pool-sequencing approach combining genome-wide association (GWA), genome-environment association (GEA) and a genome wide scan of a spatial genomic differentiation index (XX) to identify putative signatures of adaptation in seed traits and to climate and pollinator community across 14 populations of the wild plant species Brassica incana. We observed a complex genetic architecture potentially involved in seed trait adaptation, which varied depending on the seed trait function. Also, we identified several candidate genes simultaneously linked to signals of adaptation in seed traits and local abiotic or biotic conditions. These results expand our understanding on the adaptive value of seed traits, on its interaction with environmental conditions and on its potential for shaping the evolutionary trajectory of wild plant populations.
种子萌发的潜在性状，通过决定植物一生中所经历的环境，在塑造植物的适应策略中可能发挥关键作用。然而，种子性状适应的基因组基础及其与当地生物和非生物环境的联系在很大程度上仍未被探索。在此，我们采用了一种群体测序方法，结合全基因组关联（GWA）、基因组-环境关联（GEA）以及对空间基因组分化指数（XX）的全基因组扫描，来识别野生植物物种甘蓝（Brassica incana）14个种群中种子性状对气候和传粉者群落适应的假定特征。我们观察到一个可能参与种子性状适应的复杂遗传结构，其因种子性状功能而异。此外，我们还鉴定出了几个与种子性状适应信号以及当地非生物或生物条件同时相关的候选基因。这些结果扩展了我们对种子性状适应价值、其与环境条件相互作用以及其塑造野生植物种群进化轨迹潜力的理解。
