error in QtreeView Stylesheet

Code:
QTreeView *asrtTView = new QTreeView();
 
QVBoxLayout *layout = new QVBoxLayout;
           layout->addWidget(asrtTView);
        QList<QStandardItem *>  items,items2;
        assortModel= new QStandardItemModel;
 
        QStandardItem *wit1 = new QStandardItem("Peter");
        QStandardItem *wit2 = new QStandardItem("Family");
        QStandardItem *wit3 = new QStandardItem("Paul");
        QStandardItem *wit4 = new QStandardItem("John");
        QStandardItem *wit5 = new QStandardItem("Jack");
        QStandardItem *wit6 = new QStandardItem("Amie");
 
        assortModel->invisibleRootItem()->appendRow(wit1);
        assortModel->invisibleRootItem()->appendRow(wit2);
        assortModel->invisibleRootItem()->appendRow(wit3);
        assortModel->invisibleRootItem()->appendRow(wit4);
        assortModel->invisibleRootItem()->appendRow(wit5);
        assortModel->invisibleRootItem()->appendRow(wit6);
 
        assortModel->setHorizontalHeaderLabels( QStringList() << "2 Wits" <<"Assorted" );
        asrtTView->setModel(assortModel);
        asrtTView->expandAll();
        asrtTView->model()->setData(asrtTView->model()->index(0,1),QVariant("first 1 costs wariant"));
        asrtTView->model()->setData(asrtTView->model()->index(0,1).child(0,0),QVariant ("testing if i can change it like that"));
 
 
 
        ui->dropFrame->setLayout(layout);
        asrtTView->setStyleSheet(" alternate-background-color: yellow;show-decoration-selected: 1;");
       // asrtTView->setStyleSheet(QTreeView::item {border: 1px solid #d9d9d9; border-top-color: transparent;border-bottom-color: transparent;  });//this line shows error
I want to use item:hover, item:selected and all. How can I use this?