Having been determined the cross-incompatibility groups of 313 sweet potato cultivars from 1981-1986, it was found that the group B was the most and then group B >A>D>C>A(_1-2)>American red>Tiexinteug in accordance with the varietal number. And there were 6 clones beyond these 7 groups. It was also found that 10 cultivars were in semi-compatibility groups, belonging to group B, D and American red respectively, and 7 ones multi-group trait semi-compatibility. The research results could present a great deal o...
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