Local phenotypic adaptation
Common garden experiments were conducted to investigate the phenotypic
divergence evidence for genome differentiation and adaptation of theA. viridiflora complex. The mean FST for the four
lineages was 0.1519 (95% HPD: 0.14949-0.15074), and the overall
QST of the six traits was higher than the mean
FST, including the corolla diameter, petal length, spur
length, pistil length, inflorescence number and leaf area, indicating
that local adaptation was driven by these traits (Table 1). The highest
QST was procured by measuring the corolla diameter,
followed by the spur length, petal length, pistil length, inflorescence
number and leaf area, which also showed a higher QST of
floral characteristics than nutritional traits. Among the four lineages,
CN showed the smallest corolla diameter and the shortest petal length,
spur length and pistil length, followed by EL, while NW and NE showed
the largest values of these phenotypes (the difference between NW and NE
was not significant) (Figure S10A - D). Interestingly, the number of
inflorescences showed the reverse order of the above traits (Figure
S10E). EL showed the largest leaf area, followed by CN, while the
difference in leaf area between NW and NE was not significant (Figure
S10F).