The Breeding and Law of Growth and Development of a New Fresh-eating Purple Sweet Potato Variety ‘Taizishu No.1’

doi:10.11924/j.issn.1000-6850.casb2021-0037

Abstract

Abstract:

The study aims to clarify the growth and development law of purple potato varieties and accelerate the breeding and promotion of new varieties, thus provide references for the breeding of fresh-eating purple sweet potato varieties with high yield and good quality. In this experiment, a new purple sweet potato variety ‘Taizishu No.1’ was bred by open pollination with ‘Taizhong No.6’ as female parent, the law of its growth and development was also studied with the ‘Taizhong11’ as control. The results showed that the average fresh and dried potato yields of ‘Taizishu No.1’ was 36867.9 kg/hm ² and 10911.5 kg/hm² respectively, 28.4% and 27.7% higher than those of the control ‘Taizhong 11’ in the comparison experiment; its content of anthocyanin was 26.21 mg/100 g FW, and the total score of eating quality was 75.5 points, which was significantly better than that of ‘Taizhong 11’. The fresh weight of stem and leaf per plant, and the leaf area per plant of ‘TaizishuNo.1’ could reach the maximum value at 80 days after planting, which were significantly higher than that of ‘Taizhong 11’. The weight of fresh tuber per plant of ‘Taizishu No.1’ was significantly lower than that of ‘Taizhong 11’ at 40-80 days after planting, but it was significantly higher than that of ‘Taizhong 11’ after 80 days. The tuber storage root expansion rate reached the maximum value at 80-100 days after planting, which was significantly higher than that of ‘Taizhong 11’, and the commercial potato rate, especially the medium potato rate, was significantly higher than that of ‘Taizhong 11’. In summary, the ‘Taizishu No.1’ has high yield, good marketability and good eating quality, as well as the characteristics of vigorous growth of shoot in early and middle stage, and rapid expansion of tuber in late stage.

Key words: purple sweet potato, ‘Taizishu No.1’, yield, quality, growth and development

CLC Number:

S531

Chen Lulu, Sun Zhe, Tian Changgeng, Liu Shanggang, Zheng Jianli, Zhao Fengling. The Breeding and Law of Growth and Development of a New Fresh-eating Purple Sweet Potato Variety ‘Taizishu No.1’[J]. Chinese Agricultural Science Bulletin, 2021, 37(30): 25-31.

Figures/Tables 11

References 28

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年份	泰紫薯1号		泰中11(CK1)		增产/%
年份	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯	薯干
2015	37370.6	10949.6	27486.6	8136.0	36.0	34.6
2016	36365.7	10873.3	29933.3	8950.1	21.5	25.5
平均	36867.9	10911.5	28710.0	8543.1	28.4	27.7

年份	泰紫薯1号		泰中11(CK1)		增产/%
年份	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯	薯干
2015	37370.6	10949.6	27486.6	8136.0	36.0	34.6
2016	36365.7	10873.3	29933.3	8950.1	21.5	25.5
平均	36867.9	10911.5	28710.0	8543.1	28.4	27.7

年份	泰紫薯1号		济薯21(CK2)		较对照增加/%
年份	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯	薯干
2017	32002.5	9831.0	30999.0	9399.0	3.24	4.60
2018	33867.0	10668.1	34227.0	10318.5	-1.05	3.39
平均	32937.8	10249.6	32613.0	9858.8	1.00	3.96

年份	泰紫薯1号		济薯21(CK2)		较对照增加/%
年份	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯产量/(kg/hm²)	薯干产量/(kg/hm²)	鲜薯	薯干
2017	32002.5	9831.0	30999.0	9399.0	3.24	4.60
2018	33867.0	10668.1	34227.0	10318.5	-1.05	3.39
平均	32937.8	10249.6	32613.0	9858.8	1.00	3.96

品种	食味品质/分
品种	甜度	粘度	香味	纤维量	总评
泰紫薯1号	70.2	75.3	72.6	78.7	75.5
泰中11(CK1)	70.0	70.0	70.0	70.0	70.0