本研究探讨了放任授粉集团杂交技术克服甘薯亲本杂交障碍、扩大自然选择范围的可行性，为快速育成超亲品系提供借鉴。以高蛋白甘薯品种‘Tis5125’为母本，以遗传背景差异大的28 个品种（系）为父本经放任授粉集团杂交育成高蛋白高花色苷甘薯新品种‘榕紫薯1 号’。对‘榕紫薯1 号’的形态特征、农艺性状、品质性状、抗病性、生产力、适应性进行了研究。结果表明：‘榕紫薯1 号’萌芽性好，全生育期生长势稳定。2011—2012 年福建省甘薯区域试验平均鲜薯产量31.1739 t/hm2；平均干物率29.35%，比对照‘金山57’高4.36 个百分点；平均出粉率19.18%，比‘金山57’高3.80 个百分点；食味评分81.4 分，比‘金山57’高1.4 分；外观评分81.2 分，比‘金山57’高1.2 分；鲜薯花色苷含量47.39 μg/g.FW，干基粗蛋白含量7.5%；中抗蔓割病，耐贮性好。该品种于2014 年通过福建省作物品种审定委员会审定（审定编号：闽审薯2014003），适合在薯瘟病较轻的平原及山地丘陵作为鲜食薯或特用淀粉加工品种栽培。

The feasibility of overcoming the hybridization barrier between different sweetpotato parents and expanding natural selection lange through the techniques of open-pollinated group cross was discussed in this study for the reference of super parent strain breeding. A new sweetpotato cultivar ‘Rongzishu No.1’ high in protein and anthocyanin hybridized between a high protein female parent ‘Tis5125’ and male parental materials of 28 varieties (lines) with great difference of genetic background in the open-pollinated group was selected. The morphological characteristics, agronomic characteristics, quality characteristics, disease resistance, productivity and adaptability of ‘Rongzishu No.1’ were experimental studied and the results demonstrated that it had strong sprout ability, steady vigor during all growth period. In Fujian Provincal Sweetpotato Regional Trial (2011-2012), the average yield of fresh tuberous root of ‘Rongzishu No.1’was 31.1739 t/hm2. The average dry matter rate was 29.35% and 4.36 percentage point higher than ‘jinshan No.57’ (CK). The average starch rate was 19.18% and 3.80 percentage point higher than ‘jinshan No.57’. The test value of cooked taste was 81.4 and 1.4 percentage point higher than ‘jinshan No.57’. The test value of extrinsic feature was 81.2 and 1.2 percentage point higher than ‘jinshan No.57’. The anthcoyaninanthocyanin content in fresh tuberous root was 47.39 μg/g.FW. The crude protein content on dry basis was 7.5%; The resistance to Fusarium oxysporum was moderate and the storability of tuberous root was strong. It was approved by Fujian Provincial Crop Varieties Appraisal Committee in 2014(the approval No: MinShenShu2014003). As a cultivar used for fresh-eating or specially starch processing, it is suitable for growing in plain and hilly areas where the Ralstonia solanacearum wilt is lighter.