How does 1 Chronicles 2:31 connect to God's promises in Genesis?

1 Chronicles 2:31 traces Appaim → Ishi → Sheshan → Ahlai to show that, even when Judah’s branch shrinks to one child, God keeps the Genesis promises—Abraham’s countless seed (Genesis 12:2; 15:5; 22:17) and Judah’s lasting royal line (Genesis 49:10). The verse proves the line is unbroken despite Seled’s death (v. 30) and Sheshan’s later lack of sons (vv. 34–35), preserving the path that leads to David and, ultimately, the Messiah.