This verse makes it clear that Nephi is still abridging the record of his father. The most important part of one's genealogy in Lehi's day was to show descent through Israel. The Jews did have a habit of declaring long genealogies. Paul warned about this when he wrote to Titus, "But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain (Titus 3:9) Nephi declares his father's lineage through Joseph then kindly spares us the details of who begat whom from Joseph to Lehi.