Wheat shovelomics I: A field phenotyping approach for characterising the structure and function of root systems in tillering species
Wheat shovelomics I: A field phenotyping approach for characterising the structure and function of root systems in tillering species
复制标题
小麦铲组学 I：一种用于表征分蘖物种根系结构和功能的田间表型方法
DOI：
10.1101/280875
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
M. J. Foulkes
中科院分区：
文献类型：
--
作者：
L. York;S. Slack;M. Bennett;M. J. Foulkes
小麦是一种主要作物，但目前的增产速度不足以满足其预计的全球粮食需求。培育根系更有效地捕获水和氮是一个有前途的途径，加快产量的增加。根冠表型分析，或铲形组学，依赖于在田间挖掘根系的上部，并测量根的特性，如数量，角度，密度和长度。我们报道了一种新的铲组学方法，该方法对整个小麦根冠进行成像，然后将其划分为主茎和分蘖，以进行更深入的表型分析。采用新方法对由双亲和94个双单倍体品系组成的Rialto ×萨凡纳群体的根冠进行了表型分析。对整个根冠、主茎和分蘖进行了根表测量，包括节根数、生长角度、长度和直径。观察到所有表型的显著变异和遗传力。主成分分析揭示了潜在的结构，这意味着多效遗传控制的几个相关的根phenes。相关分析表明，节根数和生长角在全冠、主茎和分蘖中相关，表明这些器官之间存在共同的遗传控制。我们的结论是，这种表型学方法将是有用的分蘖物种的理想型根系育种。
Wheat represents a major crop, yet the current rate of yield improvement is insufficient to meet its projected global food demand. Breeding root systems more efficient for water and nitrogen capture represents a promising avenue for accelerating yield gains. Root crown phenotyping, or shovelomics, relies on excavation of the upper portions of root systems in the field and measuring root properties such as numbers, angles, densities and lengths. We report a new shovelomics method that images the whole wheat root crown, then partitions it into the main shoot and tillers for more intensive phenotyping. Root crowns were phenotyped using the new method from the Rialto × Savannah population consisting of both parents and 94 doubled-haploid lines. For the whole root crown, the main shoot, and tillers, root phenes including nodal root number, growth angle, length, and diameter were measured. Substantial variation and heritability were observed for all phenes. Principal component analysis revealed latent constructs that imply pleiotropic genetic control of several related root phenes. Correlational analysis revealed that nodal root number and growth angle correlate among the whole crown, main shoot, and tillers, indicating shared genetic control among those organs. We conclude that this phenomics approach will be useful for breeding ideotype root systems in tillering species.
影响因子：
5.8
作者：
F. Piñera-Chávez;P. Berry;M. J. Foulkes;G. Molero;M. Reynolds
通讯作者：
F. Piñera-Chávez;P. Berry;M. J. Foulkes;G. Molero;M. Reynolds