图2. 4种模式植物中LRR VIII-2祖先基因在古多倍化后的差异保留和扩张
左侧第1个数字为行号。方框代表种内和种间染色体共线性区段(SCB)。方框中的编码为定位于该SCB上的LRR VIII-2基因编号; 基因编号中带字母N的表示该基因与LRR VIII-2基因存在共线性同源关系, 但该基因已不具备LRR VIII-2亚家族成员的特征结构域; 字母L表示SCB上和LRR VIII-2亚家族对应的共线性基因丢失, 但该区段被保留下来; 空白位置表示SCB完全丢失。

Figure 2. Differential retention and expansion of the ancestral LRR VIII-2 gene associated with paleopolyploidy events in four model plant species
The left first digit indicates the row number. Squares in the same line represent the syntenic chromosomal blocks (SCBs) within and between species. Gene codes in the square correspond to the associated LRR VIII-2 genes; gene code containing a letter N indicates that the gene has a collinear homologous relationship with the LRR VIII-2 gene, but the gene no longer has the characteristic domain of the members of the LRR VIII-2 subfamily; the letter L represents the corresponding SCB has been retained, but the duplicated LRR VIII-2 gene on the SCB has been lost; blank regions indicate the SCBs has been completely lost.