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New Cultivar Developed

식용 자색 고구마 품종 ‘단자미’

이형운1,*, 이준설2, 정미남1, 양정욱2, 남상식1, 한선경1, 김재명1, 안승현2, 송연상2, 황엄지1, 유경단1, 고산1, 문진영3, 최규환4, 황세구5, 이안수6, 강영식7, 이경보2

A Purple-Fleshed Sweetpotato Variety ‘Danjami’ for Table Use

Korean Journal of Breeding Science 2020;52(1):53-61.
Published online: March 1, 2020

1농촌진흥청 국립식량과학원 바이오에너지작물연구소

2농촌진흥청 국립식량과학원

3경상남도농업기술원

4전라북도농업기술원

5충청북도농업기술원

6강원도농업기술원

7충청남도농업기술원

1Bioenergy Crop Research Institute, NICS, RDA, Muan 58545, Republic of Korea

2National Institute of Crop Science, RDA, Wanju 55365, Republic of Korea

3Gyeongsangnam-do Agricultural Research & Extension Services, Jinju 527, Republic of Korea

4Jeollabuk-do Agricultural Research & Extension Services, Iksan 5591, Republic of Korea

5Chungcheongbuk-do Agricultural Research & Extension Services, Cheongju 28130, Republic of Korea

6Gangwon-do Agricultural Research & Extension Services, Chuncheon 2422, Republic of Korea

7Chungcheongnam-do Agricultural Research & Extension Services, Yesan 32418, Republic of Korea

*Corresponding Author (E-mail: leehu79@korea.kr, Tel: +82-61-450-0141, Fax: +82-61-453-0085)
• Received: October 14, 2019   • Revised: October 30, 2019   • Accepted: January 6, 2020

Copyright © 2020 by the Korean Society of Breeding Science

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • ‘Jinyulmi’, a Sweetpotato Variety for Table Use
    Hyeong-Un Lee, Joon-Seol Lee, Mi-Nam Chung, Sang-Sik Nam, Jung-Wook Yang, Jae-Myung Kim, Seung-Hyun Ahn, Yeon-Sang Song, Seon-Kyeong Han, Eom-Ji Hwang, Gyeong-Dan Yu, San Goh, Seung-Yong Lee, Im-been Lee, Jin-Young Moon, Kyu-Hwan Choi, Se-Gu Hwang, An-Soo
    Korean Journal of Breeding Science.2020; 52(3): 263.     CrossRef

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A Purple-Fleshed Sweetpotato Variety ‘Danjami’ for Table Use
Korean. J. Breed. Sci.. 2020;52(1):53-61.   Published online March 1, 2020
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Korean. J. Breed. Sci.. 2020;52(1):53-61.   Published online March 1, 2020
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A Purple-Fleshed Sweetpotato Variety ‘Danjami’ for Table Use
Image Image Image
Fig. 1 Genealogical diagram of ‘Danjami’.
Fig. 2 Pedigree diagram of ‘Danjami’.
Fig. 3 Raw storage roots of ‘Danjami’ (left) and ‘Sinjami’ (right).
A Purple-Fleshed Sweetpotato Variety ‘Danjami’ for Table Use

Mature vine characteristics of ‘Danjami’ on field at harvesting stage.

Variety No. of leaf blade lobes Depth of leaf blade lobe Leaf color Extent of anthocyanin coloration on abaxial veins Anthocyanin coloration

Tip Petiole Internode Node
Danjami Absent (Cordate) - Green Very small Absent Absent Medium Medium
Sinjami 3 Shallow Green Small Medium Absent Weak Medium

Storage root characteristics of ‘Danjami’.

Variety Skin color Flesh color General shape Length/width ratio Depth of eyes
Danjami Purple Light purple Elliptic 3.3±0.9ns Shallow
Sinjami Dark purple Purple Elliptic 3.2±0.6z Shallow

Chroma value of strorage root of ‘Danjami’.

Variety Chroma valuez

Skin Flesh


L* a* b* L* a* b*
Danjami 38.9±0.9ns 12.4±0.1* 6.5±0.8ns 34.1±0.7* 28.5±1.0* -8.6±0.8ns
Sinjami 40.2±1.4y 8.7±0.6 9.3±0.7 27.9±1.3 24.2±0.6 -6.6±0.4

Agronomic characteristics, yield components, and yield of ‘Danjami’ on regional yield trial under early-season cultivation.

Variety Sprout appearance (DAP)z Date of sprouting (DAP) Vine length (cm) Vine weight (MT/ha) No. of marketable storage root per plant Avg. weight of marketable storage root (g) Marketable storage root yield (MT/ha)
Danjami 12.0±1.0* 16.0±0.6* 237.0±27.0** 44.3±11.7ns 2.3±0.3ns 104.3±17.2ns 15.3±3.0*
Sinjami 15.3±0.3y 21.0±1.2 100.0±11.2 42.2±13.9 2.8±0.1 148.0±12.2 28.0±3.4

Agronomic characteristics and yield components of ‘Danjami’ on regional yield trial under optimum and late-season cultivation.

Variety Vine length (cm) Vine Weight (MT/ha) No. of marketable storage root per plant Avg. weight of arketable storage root (g)
Danjami 460.0±31.9** 39.8±1.0ns 2.8±0.3ns 136.0±1.8*
Sinjami 193.6±13.6z 35.7±2.0 3.0±0.3 162.0±7.1

Reaction to fusarium wilt and root-knot nematode (Meloidogyne incognita) of ‘Danjami’.

Variety Fusarium wilt Root-knot nematodey No. of egg mass per plant
Danjami MRz R 20.1±6.2x
Yulmi - S (Susceptible check) 361.9±22.6
Juhwangmi - R (Resistant check) 1.6±0.8
Singeonmi R (Resistant check) - -
Sinjami MR (Moderately resistant check) MR 42.7±7.5
Borami S (Susceptible check) - -

Quality characteristics of storage root of ‘Danjami’.

Variety Dry matter content (%) Hardness of steamed storage root (g) Texture of steamed storage root Total sugar contents (g/100 g dw) °Brix of steamed storage root Palatability (1-9) Total anthocyanin (mg/100 g dw) Total polyphenol (CAE g/100 g dw) DPPH radical scavenging activity (%)

Raw Steaming
Danjami 35.7±1.7ns 1,625±222ns Slightly moist 9.2±1.7ns 36.0±10.4ns 31.3±1.5ns 6.2±0.2* 55.1±3.8** 2.5±0.2ns 77.2±3.9ns
Sinjami 30.4±1.7z 2,373±153 Intermediate 8.9±0.1 40.0±9.4 25.9±2.4 5.0±0.0 229.8±7.3 2.5±0.1y 79.6±4.9

Storage root yield (MT/ha) over 50 g of ‘Danjami’ on preliminary and advanced yield trials.

Variety Storage root yield (MT/ha)

2011 2012 Mean Indexz
Danjami 22.5 20.6 21.6 89
Sinjami 22.4 25.8 24.1 100

Marketable storage root yield (MT/ha) of ‘Danjami’ on regional yield trial under optimum and late season cultivation at six regions.

Region Danjami (Mt/ha) Indexz (A/B) Sinjami (MT/ha)


2013 2014 2015 Mean (A) 2013 2014 2015 Mean (B)
Muan 15.0 30.8 33.3 26.4 81 16.8 35.2 45.8 32.6
Gangreung (Chuncheon) (15.8) 35.4 20.3 23.8 83 (22.6) 39.2 24.3 28.7
Cheongju 21.8 18.0 25.0 21.6 85 20.7 28.4 27.2 25.4
Yesan - - 27.8 27.8 76 - - 36.5 36.5
Iksan 20.2 20.6 32.2 24.3 88 33.8 15.5 33.7 27.7
Jinju 12.2 6.2 13.1 10.5 52 20.8 20.5 19.5 20.3

Mean 17.0 22.2 25.3 21.5ns 79 22.9 27.8 31.2 27.3
Table 1 Mature vine characteristics of ‘Danjami’ on field at harvesting stage.
Table 2 Storage root characteristics of ‘Danjami’.

Mean±SE (n=3).

Not significant (ns) in the t-test.

Table 3 Chroma value of strorage root of ‘Danjami’.

L, Lightness: black=0, white=100; a, redness to greenness: green=-80, red=+80; b, yellowness to blueness: blue=-80, yellowness=+80.

Mean±SE (n=3).

Not significant (ns) in the t-test, while * significant at p<0.05.

Table 4 Agronomic characteristics, yield components, and yield of ‘Danjami’ on regional yield trial under early-season cultivation.

DAP: Days after planting.

Mean±SE (n=3).

Not significant (ns) in the t-test, while * and ** significant at p<0.05 and p<0.01, respectively.

Table 5 Agronomic characteristics and yield components of ‘Danjami’ on regional yield trial under optimum and late-season cultivation.

Mean±SE (n=3).

Not significant (ns) in the t-test, while * and ** significant at p<0.05 and p<0.01, respectively.

Table 6 Reaction to fusarium wilt and root-knot nematode (Meloidogyne incognita) of ‘Danjami’.

R: Resistance, MR: Moderate resistance, S: Susceptibility.

Resistance was determined by number of egg masses per plant. R: ≤10% of a susceptible cultivar (Yulmi), MR: 11~25%, S: >25%.

Mean±SE (n=7).

Table 7 Quality characteristics of storage root of ‘Danjami’.

Mean±SE (n=3), yMean±SE (n=8).

Not significant (ns) in the t-test, while * and ** significant at p<0.05 and p<0.01, respectively.

Table 8 Storage root yield (MT/ha) over 50 g of ‘Danjami’ on preliminary and advanced yield trials.

(Yield of ‘Danjami’ / yield of ‘Sinjami’)×100.

Table 9 Marketable storage root yield (MT/ha) of ‘Danjami’ on regional yield trial under optimum and late season cultivation at six regions.

(Yield of ‘Danjami’ / yield of ‘Sinjami’)×100.

Not significant (ns) in the t-test.