The remarkable morphological diversity of leaf shape in sweet potato (Ipomoea batatas): the influence of genetics, environment, and GxE
The remarkable morphological diversity of leaf shape in sweet potato (Ipomoea batatas): the influence of genetics, environment, and GxE
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DOI：
10.1111/nph.16286
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发表时间：
2019-11-28
期刊：
影响因子：
9.4
通讯作者：
Baucom, Regina S.
中科院分区：
文献类型：
--
作者：
Gupta, Sonal;Rosenthal, David M.;Baucom, Regina S.
叶子形状是一种非常多样的植物特征，在不同的分类水平、地理位置和环境差异中都有所不同。然而，令人惊讶的是，对不同环境下叶片形状变化的种内综合分析却缺失。本研究利用不同甘薯材料对叶片形状进行了多层次分析，揭示了遗传、环境和GxE对这一重要性状的影响。我们使用多种形态计量学分析来检查叶片形状，并辅以转录组学调查来确定与形状变化相关的基因表达变化。此外，我们通过在两个地理上分开的普通花园进行实地研究，研究了遗传和环境对叶片形状的作用。结果表明，巴塔塔属植物存在广泛的叶形变异，并鉴定出与这种变异相关的候选基因。有趣的是，当考虑传统的测量方法时，我们发现遗传因素在很大程度上对大多数叶形变化负责，但是当使用更多的定量测量方法时，环境是高度影响的。这种对叶片形状的广泛和多层次的研究表明，遗传学在潜在的重要农艺性状中起着重要作用，并强调在使用更多的叶片形状定量测量时，环境可能是一个强烈的影响。
Leaf shape, a spectacularly diverse plant trait, varies across taxonomic levels, geography and in response to environmental differences. However, comprehensive intraspecific analyses of leaf shape variation across variable environments is surprisingly absent. Here, we performed a multilevel analysis of leaf shape using diverse accessions of sweet potato (Ipomoea batatas), and uncovered the role of genetics, environment, and GxE on this important trait. We examined leaf shape using a variety of morphometric analyses, and complement this with a transcriptomic survey to identify gene expression changes associated with shape variation. Additionally, we examined the role of genetics and environment on leaf shape by performing field studies in two geographically separate common gardens. We showed that extensive leaf shape variation exists within I. batatas, and identified promising candidate genes associated with this variation. Interestingly, when considering traditional measures, we found that genetic factors are largely responsible for most of leaf shape variation, but that the environment is highly influential when using more quantitative measures via leaf outlines. This extensive and multilevel examination of leaf shape shows an important role of genetics underlying a potentially important agronomic trait, and highlights that the environment can be a strong influence when using more quantitative measures of leaf shape.