Unravelling the impact of domestication on competitive ability in durum wheat: A phenotypic plasticity perspective

The need to address the impact of domestication on plant traits is frequently highlighted in modern agriculture. It is often argued that domesticated plants have lost competitive ability due to reduced phenotypic plasticity. This study examines whether domestication has affected competitive ability, functional trait values, and plasticity in durum wheat across 39 genotypes representing four key stages of domestication, from wild progenitors to modern elite varieties. Plants were grown in pots, both alone and in competition with a same neighboring genotype. Biomass, and above- and belowground traits were measured at the end of the vegetative stage. Our results show that the three domesticated groups lost less biomass in response to competition compared to their wild progenitors. All genotypes developed thinner leaves and thicker roots when grown with a neighbor. While wild progenitors exhibited the highest plasticity, this did not translate to a greater competitive ability. These finding..., , , # Data from: Unravelling the impact of domestication on competitive ability in durum wheat: A phenotypic plasticity perspective [https://doi.org/10.5061/dryad.t1g1jwtbk](https://doi.org/10.5061/dryad.t1g1jwtbk) ## Description of the data acquisition context ``` Data where collected on 39 accessions from the domestication history of the tetraploid wheat: 10 wild emmer accessions of the wild progenitor T. turgidum ssp. dicoccoides (W), 10 accessions of the first domesticated emmer T. turgidum ssp. dicoccum (FD), 10 landrace accessions of durum wheat T. turgidum ssp. durum belonging to the pre-Green Revolution period (DL), and 9 elite accessions of durum wheat registered in Europe after the Green Revolution (DE). Seeds were originally gathered from internationa seed collections (Table 1). To ensure genetic homogeneity of seeds within accessions, accessions were further reproduced by successive self-fertilizations in common gardens by INRAE UMR AGAP, Montpellier, France. ``` ###### *Ex...现代农学领域中，解析驯化作用对植物性状的影响始终是广受关注的重要研究方向。学界普遍认为，驯化作物因表型可塑性（phenotypic plasticity）降低而丧失了竞争能力。本研究以覆盖硬粒小麦（durum wheat）驯化四个关键阶段的39份基因型材料为研究对象，探究驯化是否对其竞争能力、功能性状值及表型可塑性产生影响，该四个阶段涵盖从野生祖先种到现代优良品种的完整驯化谱系。 所有供试植株均采用盆栽种植，设置单株种植与同种邻株竞争两种栽培处理，于营养生长末期测定植株生物量、地上部与地下部性状指标。 研究结果表明，相较于野生祖先种，三个驯化类群在竞争环境下的生物量损失显著更少。所有供试基因型在邻株共存条件下均表现出叶片变薄、根系增粗的表型响应。尽管野生祖先种展现出最高的表型可塑性，但这并未使其具备更强的竞争能力。本研究发现…… # 数据来源：解析驯化对硬粒小麦竞争能力的影响：基于表型可塑性的视角 [https://doi.org/10.5061/dryad.t1g1jwtbk](https://doi.org/10.5061/dryad.t1g1jwtbk) ## 数据采集背景 本研究数据来源于覆盖四倍体小麦（tetraploid wheat）驯化历史的39份种质资源：包含10份野生二粒小麦（T. turgidum ssp. dicoccoides, W）野生祖先种种质、10份初代驯化二粒小麦（T. turgidum ssp. dicoccum, FD）种质、10份属于绿色革命前时期的硬粒小麦地方品种（T. turgidum ssp. durum, DL）种质，以及9份绿色革命后在欧洲登记的硬粒小麦优良品种（T. turgidum ssp. durum, DE）种质。所有种子最初均采集自国际种子库（详见表1）。为确保每份种质内种子的遗传均一性，法国蒙彼利埃INRAE UMR AGAP研究团队通过在共同花园中连续多代自交对种质进行了扩繁。 ###### *实验……