Three field experiments conducted over two consecutive seasons in Tonga did not confirm the correlation between origin and response to reproductive pruning. When examining genotypic and environmental responses to reproductive pruning in 32 accessions of P. erosus, it was revealed that reproductive pruning increased tuber yield uniformly across accessions. Furthermore, although the accessions differed in tuber shape, soluble sugar and dry matter tuber content, reproductive pruning did not have any influence on these quality traits (Grum et al. 1996)