NBS-domains genes amplification model related to gene duplication events in Lotus japonicus.

  The curved lines within inner circle, colored by green, linked paralog pairs on Lotus japonicus 6 chromosomes produced by LCT (b). NBS-domains subfamily genes with darkgreen (NBS-TNL), crimson (NBS-TNx), darkorange" (NBS-xNL) and navy (NBS-xNx). Colored curved lines linked nodulation gene pairs with Ks < 0.15.