Exploring the chemotypes underlying important agronomic and consumer traits in cassava (Manihot esculenta crantz)
Exploring the chemotypes underlying important agronomic and consumer traits in cassava (Manihot esculenta crantz)
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DOI：
10.1016/j.jplph.2020.153206
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发表时间：
2020-08-01
影响因子：
4.3
通讯作者：
Fraser, Paul D.
中科院分区：
文献类型：
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作者：
Drapal, Margit;Rivera, Tatiana M. Ovalle;Fraser, Paul D.
在木薯种质资源库中可获得广泛多样的表型。表型包括改善的营养、淀粉或烹饪根质量以及非生物和生物抗性特性。其中一些特征可以在木薯地方品种中自然发现，而另一些则是有针对性的育种努力的结果。对于未来的育种计划，重要的是要知道这些理想性状的潜在机制。代谢组学可以通过测量赋予目标性状的细胞过程的终产物来帮助阐明这些机制。本研究的重点是比较两个或两个以上的变种相同的性状，如高和低的烹饪品质或抗和感蓟马。结果表明，氨基酸和鲜味化合物与优良的上级烹饪品质相关，苯丙烷超途径在抗虫性中起重要作用。此外，数据突出表明，非洲木薯的化学多样性较低，源-汇关系在收获阶段仍然活跃。
A broad diversity of phenotypes are available within the cassava germplasm collections. The phenotypes include improved nutritional, starch or culinary root quality as well as abiotic and biotic resistance properties. Some of these traits can be found naturally occurring in cassava landraces, whereas others are the result of targeted breeding efforts. For future breeding programmes it is important to know the underlying mechanisms of these desirable traits. Metabolomics can assist in the elucidation of these mechanisms by measuring the end products of the cellular processes conferring the traits of interest. The present study focused on the comparison of two or more variants of the same trait such as high and low culinary quality or resistance and susceptibility to thrips. Overall, eight different traits were assessed.Results showed that amino acids and umami compounds were associated with superior culinary attributes and the phenylpropanoid superpathway plays an important role in pest resistance. Furthermore, the data highlighted a low chemodiversity in African cassavas and that the source-sink relation was still active at the harvest stage.