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首页> 外文期刊>Molecular ecology >Effect of genotype and environment on branching in weedy green millet (Setaria viridis) and domesticated foxtail millet (Setaria italica) (Poaceae)
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Effect of genotype and environment on branching in weedy green millet (Setaria viridis) and domesticated foxtail millet (Setaria italica) (Poaceae)

机译：基因型和环境对杂草绿粟（Setaria viridis）和家养谷尾粟（Setaria italica）（禾本科）分枝的影响

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摘要

Many domesticated crops are derived from species whose life history includes weedy characteristics, such as the ability to vary branching patterns in response to environmental conditions. However, domesticated crop plants are characterized by less variable plant architecture, as well as by a general reduction in vegetative branching compared to their progenitor species. Here we examine weedy green millet and its domesticate foxtail millet that differ in the number of tillers (basal branches) and axillary branches along each tiller. Branch number in F-2:3 progeny of a cross between the two species varies with genotype, planting density, and other environmental variables, with significant genotype-environment interactions (GEI). This is shown by a complex pattern of reaction norms and by variation in the pattern of significant quantitative trait loci (QTL) amongst trials. Individual and joint analyses of high and low density trials indicate that most QTL have significant GEI. Dominance and epistasis also explain some variation in branching. Likely candidate genes underlying the QTL (based on map position and phenotypic effect) include teosinte branched1 and barren stalk1. Phytochrome B, which has been found to affect response to shading in other plants, explains little or no variation. Much variation in branching is explained by QTL that do not have obvious candidate genes from maize or rice.
机译：许多驯化的农作物都来自其生活史包括杂草特征的物种，例如能够根据环境条件改变分支模式的能力。但是，驯化的农作物的特征在于其植物结构的可变性较小，以及与其祖先物种相比，营养分支的普遍减少。在这里，我们研究了杂草绿色小米及其驯化的谷子小米，它们在每个分till上的分ers（基部分枝）和腋生分枝的数量不同。两个物种之间杂交的F-2：3子代的分支数随基因型，种植密度和其他环境变量而变化，并且具有显着的基因型-环境相互作用（GEI）。在实验中，反应规范的复杂模式以及重要的定量性状基因座（QTL）模式的变化表明了这一点。高密度和低密度试验的个体和联合分析表明，大多数QTL具有显着的GEI。优势和上位性也解释了分支的某些变化。 QTL的潜在候选基因（基于图谱位置和表型效应）包括teosinte branched1和barrens1。已发现植物色素B会影响其他植物对遮荫的反应，但几乎没有变化。 QTL解释了分支中的许多变异，这些变异没有来自玉米或水稻的明显候选基因。

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