Insight into the Genetic Components of Community Genetics: QTL Mapping of Insect Association in a Fast-Growing Forest Tree

Identifying genetic sequences underlying insect associations on forest trees will improve the understanding of community genetics on a broad scale. We tested for genomic regions associated with insects in hybrid poplar using quantitative trait loci (QTL) analyses conducted on data from a common garden experiment. The F2 offspring of a hybrid poplar (Populus trichocarpa x P. deltoides) cross were assessed for seven categories of insect leaf damage at two time points, June and August. Positive and negative correlations were detected among damage categories and between sampling times. For example, sap suckers on leaves in June were positively correlated with sap suckers on leaves (P解析林木与昆虫互作相关的遗传序列，可从宏观层面深化对群落遗传学的认知。 本研究基于同质园（common garden）实验的数据，通过数量性状位点（quantitative trait loci, QTL）分析，对杂交杨中与昆虫相关的基因组区域进行了检测。 研究以毛果杨（*Populus trichocarpa*）与美洲黑杨（*P. deltoides*）杂交获得的F2代后代为实验材料，于6月和8月两个采样时间点，针对7类昆虫叶部为害情况开展评估。 研究在各类为害类别间及不同采样时段间，均检测到正相关与负相关关联。例如，6月叶片上的吸汁性昆虫为害情况与叶片上的吸汁性昆虫为害呈正相关（P