Mapping Covariation Quantitative Trait Loci That Control Organ Growth and Whole-Plant Biomass
Mapping Covariation Quantitative Trait Loci That Control Organ Growth and Whole-Plant Biomass
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绘制控制器官生长和全株生物量的协变数量性状位点
DOI：
10.3389/fpls.2019.00719
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发表时间：
2019-06-04
影响因子：
5.6
通讯作者：
Wu, Rongling
中科院分区：
文献类型：
--
作者：
Gan, Jingwen;Cao, Yige;Wu, Rongling
植物器官生长和生物量积累之间的协变在植物中起着重要作用。植物在自然界中捕获最佳适应性，这取决于叶，茎和根等不同器官的协调和相互作用。虽然许多研究都集中在植物生长或生物量分配，协调变异的遗传机制的详细信息是缺乏的。在这里，我们扩展了一个新的映射模型的基础上功能定位检测共变数量性状基因座（QTL），管理发展的植物器官和整个生物量，通过一系列的假设检验，允许量化的QTL如何调节器官生长和生物量积累之间的共变。利用该模型对拟南芥重组自交系（RILs）的叶片数和全株干重进行了分析。两个关键的QTL相关的生长和生物量分配，驻留在生物学意义的基因，CRA1和HIPP25，其特征在于。这两个基因可能控制两个性状之间的协变。新模型将能够阐明生长和生物量积累的遗传结构，这可能会增强我们对植物适应性发展的理解。
Covariation between organ growth and biomass accumulation plays an important role in plants. Plant to capture optimal fitness in nature, which depend coordinate and interact for distinct organs such as leaves, stems, and roots. Although many studies have focused on plant growth or biomass allocation, detailed information on the genetic mechanism of coordinated variation is lacking. Here, we expand a new mapping model based on functional mapping to detect covariation quantitative trait loci (QTLs) that govern development of plant organs and whole biomass, which, via a series of hypothesis tests, allows quantification of how QTLs regulate covariation between organ growth and biomass accumulation. The model was implemented to analyze leaf number data and the whole dry weight of recombinant inbred lines (RILs) of Arabidopsis. Two key QTLs related to growth and biomass allocation that reside within biologically meaningful genes, CRA1 and HIPP25, are characterized. These two genes may control covariation between two traits. The new model will enable the elucidation of the genetic architecture underlying growth and biomass accumulation, which may enhance our understanding of fitness development in plants.