Figure 1
From: Analysis of Epistasis among QTLs on Heading Date based on Single Segment Substitution Lines in Rice

A preliminary network of rice flowering among six QTLs investigated. QTL i represented QTL on SSSL i . QTL i → QTL j and QTL i ⊣ QTL j indicated that QTL i activated and repressed the expression of QTL j , respectively. NLD and NSD were the abbreviations of natural long-day and short-day, respectively.