番茄是重要的蔬菜作物，可溶性固形物是番茄重要的品质性状。挖掘自然群体中可溶性固形物（Soluble Solid Content, SSC）的优异基因和资源，对番茄育种实践具有重要的价值。我们已经对400份遗传多态性丰富的番茄群体进行了初步的性状调查和重测序分析，在此基础上我们拟通过全基因组关联分析和分离群体混合测序相结合的方法对群体中可溶性固形物含量QTLs（qSSC）进行检测，精细定位主效位点，进一步通过回交转育探索此位点在番茄育种中的应用价值。本研究不仅有助于番茄群体高qSSC遗传位点的挖掘和育种应用，而且相应的研究策略对番茄其它性状的改良也具有重要的借鉴价值。

Tomato is an important vegetable crop and soluble solid content of fruit is a main quality trait. Mining the genes and resources of soluble solid content in natural population is valuable for tomato breeding. Preliminary investigation of trait and re-sequencing of one population including 400 individuals have been finished, and we found abundant phenotype and genetic variations within this group. Based on that, we will further detect the quantitative trait loci of soluble solid content (qSSC) by genome-wide association combined with bulked analysis of segregation population, and fine map the major gene. The breeding value of major QTL would be tested by backcross transformation. This research does not only contribute the discovery and breeding application of high qSSC in tomato population but also could give references for other trait improvements in tomato breeding.