Sentence:  Studying the duration of the flowering-<WSD>fructification</WSD> period among interspecific first-generation back-cross progenies of African species showed that this trait is positively correlated (r=0.78) with 100-seed weight and caffeine content. 
Meaning of the word marked with <WSD> tags:  The act of forming or producing fruit; the act of fructifying, or rendering productive of fruit; fecundation.