The quantitative-genetic and QTL architecture of trait integration and modularity in Brassica rapa across simulated seasonal settings
The quantitative-genetic and QTL architecture of trait integration and modularity in Brassica rapa across simulated seasonal settings
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DOI：
10.1038/hdy.2010.103
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发表时间：
2011-04-01
期刊：
影响因子：
3.8
通讯作者：
Weinig, C.
中科院分区：
文献类型：
--
作者：
Edwards, C. E.;Weinig, C.
在生物体内，具有不同功能的一组特征通常是模块化的，因此模块之间的差异是独立的，模块内的差异是紧密结合或相关的。在这里，我们研究了甘蓝型油菜在三个模拟的季节温度/光周期条件下的性状整合和模块化模式。本研究的目的是利用性状相关性来了解三种处理下白菜花、营养和物候性状内部和之间的性状整合和模块化模式，研究性状整合和模块化模式背后的QTL结构，并量化温度和光周期的变化如何影响性状的相关性结构和QTL结构。白菜的所有花器官都是强相关的，与预期相反的是，花和营养性状也是相关的。广泛的QTL共定位表明，这些性状的协变可能是由于多效性，尽管不能排除独立影响个体性状的物理连锁基因座。在所有处理中，基因类型和QTL相关性的结构总体上是保守的。所观察到的遗传结构的任何变化都源于基因x环境互作(GEI)和伴随的QTL x E对温度的响应，而不是光周期。《遗传》(2011)106661-677；doi：10.1038/hdy.2010.103；2010年8月25日在线发布
Within organisms, groups of traits with different functions are frequently modular, such that variation among modules is independent and variation within modules is tightly integrated, or correlated. Here, we investigated patterns of trait integration and modularity in Brassica rapa in response to three simulated seasonal temperature/ photoperiod conditions. The goals of this research were to use trait correlations to understand patterns of trait integration and modularity within and among floral, vegetative and phenological traits of B. rapa in each of three treatments, to examine the QTL architecture underlying patterns of trait integration and modularity, and to quantify how variation in temperature and photoperiod affects the correlation structure and QTL architecture of traits. All floral organs of B. rapa were strongly correlated, and contrary to expectations, floral and vegetative traits were also correlated. Extensive QTL co-localization suggests that covariation of these traits is likely due to pleiotropy, although physically linked loci that independently affect individual traits cannot be ruled out. Across treatments, the structure of genotypic and QTL correlations was generally conserved. Any observed variation in genetic architecture arose from genotype x environment interactions (GEIs) and attendant QTL x E in response to temperature but not photoperiod. Heredity (2011) 106, 661-677; doi:10.1038/hdy.2010.103; published online 25 August 2010