Baptisia leucophaea

Especially complex variation arises in situations in which hybridization or the combination of two genetically different groups exists. In some plants, additive chemistry, apparently produced by the presence of two sets of enzyme systems, has been observed. In hybrids of Baptisia leucophaea and B. spherocarpa, the appearance of a hybrid compound (a 7-6>-glucoside-3-0-rutinoside) can be explained as such an additive combination (one parental type produced the 7-0-glucoside, whereas the other produced the 3-0-gluco-side). Other compounds, predicted on the basis of the chemistry of the putative parents, are mysteriously absent (Alston et al., 1965 Markham and Mabry, 1968). 

In hybrids of Baptisia leucophaea and 5. spherocarpa, the appearance of a hybrid compound could be explained when the chemical nature of the compound was ascertained. Combination of the enzymes that produced a 3-(9-rutinoside (rutin) (35) in the former and the 7-(9-glucoside (36) in the latter produced a 7-(7-glucoside-3-0-rutinoside (37) in the hybrids (Fig. 11.17) (Alston and Turner, 1963 Alston et al., 1965). 

---