Israel is God's vine in Psalm 80 and Isaiah 5, often portrayed as failing to produce the desired fruit.
Psalm 80:8-19; Isaiah 5:1-7 are central backgrounds.
Jesus presents himself as the faithful reality in whom God's people must abide for life and fruitfulness.
The saying is not a direct YHWH identification, but the absolute dependence of disciples upon abiding in Jesus contributes strongly to his life-giving identity.