Functional mapping of N deficiency-induced response in wheat yield-component traits by implementing high-throughput phenotyping
Functional mapping of N deficiency-induced response in wheat yield-component traits by implementing high-throughput phenotyping
复制标题
通过实施高通量表型分析，对小麦产量组成性状中氮缺乏诱导的反应进行功能图谱
DOI：
10.1111/tpj.14186
复制
发表时间：
2019-03-01
期刊：
影响因子：
7.2
通讯作者：
Wu, Rongling
中科院分区：
文献类型：
--
作者：
Jiang, Libo;Sung, Lidan;Wu, Rongling
随着过量施肥导致环境问题和氮肥成本的增加，如何选择在缺氮土壤上高产的作物品种变得至关重要。然而，关于作物对N信号诱导的环境变化做出反应的遗传机制，人们知之甚少。在此，我们剖析了氮素诱导面包小麦表型可塑性的遗传结构。通过集成与产量相关的冠层结构的功能图谱和半自动高通量表型数据。我们确定了一组数量性状基因座(QTL)，它们决定了小麦品种在整个生命周期内对正常供氮的低氮胁迫反应的模式和幅度。这一分析突出了由单个QTL施加的遗传效应的物候景观，以及它们与N诱导信号和冠层测量角度的交互作用。这些信息可能有助于我们对植物适应机制的理解，并为选育耐氮亏缺小麦品种提供有价值的信息。
As overfertilization leads to environmental concerns and the cost of N fertilizer increases, the issue of how to select crop cultivars that can produce high yields on N-deficient soils has become crucially important. However, little information is known about the genetic mechanisms by which crops respond to environmental changes induced by N signaling. Here, we dissected the genetic architecture of N-induced phenotypic plasticity in bread wheat (Triticum aestivum L.) by integrating functional mapping and semiautomatic high-throughput phenotyping data of yield-related canopy architecture. We identified a set of quantitative trait loci (QTLs) that determined the pattern and magnitude of how wheat cultivars responded to low N stress from normal N supply throughout the wheat life cycle. This analysis highlighted the phenological landscape of genetic effects exerted by individual QTLs, as well as their interactions with N-induced signals and with canopy measurement angles. This information may shed light on our mechanistic understanding of plant adaptation and provide valuable information for the breeding of N-deficiency tolerant wheat varieties.