Distribution and Genetic Diversity of Dasheen Mosaic Virus in Konjac in Southern Shaanxi，China

doi:10.16420/j.issn.0513-353x.2025-0489

Acta Horticulturae Sinica ›› 2026, Vol. 53 ›› Issue (8): 2469-2480.doi: 10.16420/j.issn.0513-353x.2025-0489

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Distribution and Genetic Diversity of Dasheen Mosaic Virus in Konjac in Southern Shaanxi，China

YANG Jinfang, LEI Lina, LIU Xiang, LIU Huan^*(), HEI Fei, LI Chuan

Shaanxi Province College Engineering Research Center of Selenium-enriched Konjac， College of Modern Agriculture and Biotechnology，Ankang University，Ankang， Shaanxi 725000， China

Received:2026-04-16 Revised:2026-05-29 Online:2026-08-25 Published:2026-08-25
Contact: LIU Huan

Abstract

Abstract:

Dasheen mosaic virus（DsMV）was identified in konjac（Amorphophallus rivieri）in Ankang，Shaanxi，China，using metaviromic sequencing. To investigate the prevalence and genetic diversity of DsMV in this region，207 leaf and bulb samples of Amorphophallus konjac K. Koch were collected from southern Shaanxi and analyzed via RT-PCR，revealing an average virus positive rate of 37.7%. Based on published DsMV genome sequences and metaviromic data，specific primers targeting conserved viral genomic regions were designed. Using long-fragment RT-PCR and RACE technologies，the complete genomes of 9 DsMV isolates from konjac in southern Shaanxi were obtained. Nucleotide similarity among these isolates ranged from 77.6% to 98.9%，while their similarity to published DsMV genomes varied between 76.1% and 98.8%. Sequence analysis indicated significant variation in the P1，P3，VPg，and CP regions. A phylogenetic tree constructed from 34 complete DsMV genome sequences suggested that genetic diversity was not correlated with host species or geographical distribution. Recombination analysis revealed that the nine konjac-derived DsMV isolates participated in 19 recombination events. These findings demonstrate that DsMV infecting konjac exhibits substantial genetic diversity，primarily driven by recombination.

Key words: konjac, dasheen mosaic virus, complete genome, genetic diversity

YANG Jinfang, LEI Lina, LIU Xiang, LIU Huan, HEI Fei, LI Chuan. Distribution and Genetic Diversity of Dasheen Mosaic Virus in Konjac in Southern Shaanxi，China[J]. Acta Horticulturae Sinica, 2026, 53(8): 2469-2480.

Figures/Tables 9

References 32

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引物名称 Primer name	引物序列 Primer sequence	引物长度/bp Length	退火温度/℃ Annealing temperature	产物大小/bp Product length	引物结合位点^* Primer binding sites
DsMV-F	ATGAATGGTTTYATGGTYTGGTGCAT	26	55	419	9 305 ~ 9 330
DsMV-R	GCAGTGTGCCTTTCAGTGTT	20	55	419	9 704 ~ 9 723
DsMV-F1	ATGAGTGAYGARGARTAYAAGGCRCAYATAGC	27	58	4 484	1 553 ~ 1 584
DsMV-R1	CGRTCYCKTGCATCYCTAAACTTGAG	26	58	4 484	6 011 ~ 6 036
DsMV-F2	CTAAYTACTCAGATGTGGCTGATCTTG	27	58	3 688	5 775 ~ 5 801
DsMV-R2	GAAAAGTGATGCATDATYTGACGCAAG	27	58	3 688	9 436 ~ 9 462
DsMV-5RACE	GCTCTYTTGTTYCTAAAWGATTCAAGATT	29	58	1 914	1 886 ~ 1 914
DsMV-3RACE	ATGCATCACTTTTCTGACGCAGCAGAGGC	29	65	584	9 449 ~ 9 477

引物名称 Primer name	引物序列 Primer sequence	引物长度/bp Length	退火温度/℃ Annealing temperature	产物大小/bp Product length	引物结合位点^* Primer binding sites
DsMV-F	ATGAATGGTTTYATGGTYTGGTGCAT	26	55	419	9 305 ~ 9 330
DsMV-R	GCAGTGTGCCTTTCAGTGTT	20	55	419	9 704 ~ 9 723
DsMV-F1	ATGAGTGAYGARGARTAYAAGGCRCAYATAGC	27	58	4 484	1 553 ~ 1 584
DsMV-R1	CGRTCYCKTGCATCYCTAAACTTGAG	26	58	4 484	6 011 ~ 6 036
DsMV-F2	CTAAYTACTCAGATGTGGCTGATCTTG	27	58	3 688	5 775 ~ 5 801
DsMV-R2	GAAAAGTGATGCATDATYTGACGCAAG	27	58	3 688	9 436 ~ 9 462
DsMV-5RACE	GCTCTYTTGTTYCTAAAWGATTCAAGATT	29	58	1 914	1 886 ~ 1 914
DsMV-3RACE	ATGCATCACTTTTCTGACGCAGCAGAGGC	29	65	584	9 449 ~ 9 477

采样地点 Sampling location	样品数量 Sample quantity		阳性样品数量 Number of infected samples		RT-PCR检出率/% RT-PCR detection rate
采样地点 Sampling location	叶片 Leaf	种球 Bulb	叶片Leaf	种球 Bulb	叶片Leaf	种球 Bulb
安康市汉滨区 Hanbin，Ankang	21	17	6	4	28.57	23.53
安康市岚皋县 Langao，Ankang	35	57	14	27	40.00	47.37
安康市汉阴县 Hanyin，Ankang	15	24	4	9	26.67	37.50
安康市旬阳市 Xunyang，Ankang	18	20	7	7	38.89	35.00

采样地点 Sampling location	样品数量 Sample quantity		阳性样品数量 Number of infected samples		RT-PCR检出率/% RT-PCR detection rate
采样地点 Sampling location	叶片 Leaf	种球 Bulb	叶片Leaf	种球 Bulb	叶片Leaf	种球 Bulb
安康市汉滨区 Hanbin，Ankang	21	17	6	4	28.57	23.53
安康市岚皋县 Langao，Ankang	35	57	14	27	40.00	47.37
安康市汉阴县 Hanyin，Ankang	15	24	4	9	26.67	37.50
安康市旬阳市 Xunyang，Ankang	18	20	7	7	38.89	35.00

采样地点 Sampling location	植株症状 Plant symptoms	分离物 Isolate	基因组大小/nt Genome size	登录号 Accession No.
安康市汉滨区 Hanbin，Ankang	褪绿 Chlorosis	MYIA-SXAK	9 962	PV235466
安康市汉滨区 Hanbin，Ankang	花叶 Mosaic	MYIB-SXAK	9 962	PV235468
安康市汉阴县 Hanyin，Ankang	褪绿 Chlorosis	MYRC-SXAK	10 036	PV235467
安康市汉阴县 Hanyin，Ankang	卷叶，花叶 Leafrol，mosaic	MYRB-SXAK	9 961	PV235469
安康市旬阳市 Xunyang，Ankang	花叶 Mosaic	MYF-SXAK	10 026	PQ863969
安康市旬阳市 Xunyang，Ankang	黄化 Yellowing	MYC-SXAK	9 972	PQ863971
安康市岚皋县 Langao，Ankang	花叶 Mosaic	MYH2-SXAK	9 957	PQ863972
	环斑 Ringspot	MYH3-SXAK	9 960	PQ863970
	矮化，花叶 Dwarf，mosaic	M9-SXAK	9 958	PV235470

Distribution and Genetic Diversity of Dasheen Mosaic Virus in Konjac in Southern Shaanxi，China

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分离物 Isolate	MYRC- SXAK	MYC- SXAK	MYF- SXAK	MYH2- SXAK	MYH3- SXAK	MYRB- SXAK	MYIA- SXAK	M9- SXAK	MYIB- SXAK
MYRC-SXAK	100.0
MYC-SXAK	84.5	100.0
MYF-SXAK	84.6	85.2	100.0
MYH2-SXAK	78.6	78.4	77.6	100.0
MYH3-SXAK	81.1	81.5	79.3	82.2	100.0
MYRB-SXAK	81.1	81.5	79.4	82.1	98.9	100.0
MYIA-SXAK	81.0	81.6	79.2	82.2	98.3	98.3	100.0
M9-SXAK	80.9	81.4	79.3	82.2	98.2	98.2	98.3	100.0
MYIB-SXAK	80.8	81.6	80.0	82.9	90.9	91.0	90.9	90.6	100.0
其他Others	79.2 ~ 86.1	78.3 ~ 85.1	79.4 ~ 85.9	76.1 ~ 82.6	78.6 ~ 98.8	78.4 ~ 98.8	78.4 ~ 98.3	78.0 ~ 98.1	77.9 ~ 91.0

区域 Region	DsMV魔芋分离物蛋白大小/kD Protein size of DsMV-konjac isolates
区域 Region	MYC- SXAK		MYF- SXAK	MYH2- SXAK		MYH3- SXAK	MYIA- SXAK		MYRC- SXAK	MYIB- SXAK		MYRB- SXAK	M9- SXAK
多聚蛋白 Poly protein	3 185		3 203	3 177		3 178	3 178		3 206	3 178		3 178	3 177
P1	397		397	385		385	385		385	385		385	384
HC-Pro	458		458	458		458	458		458	458		458	458
P3	346		346	346		346	346		346	346		346	346
6K1	52		52	52		52	52		52	52		52	52
CI	634		634	634		634	634		634	634		634	634
6K2	53		53	53		53	53		53	53		53	53
NIa-VPg	190		190	190		190	190		190	190		190	190
NIa-Pro	243		243	243		243	243		243	243		243	243
NIb	516		516	516		516	516		516	516		516	516
CP	296		314	300		301	301		329	301		301	301
区域 Region		魔芋分离物相互比较 Konjac isolates comparison with each other						魔芋与其他分离物比较 Comparison of konjac and other isolates
区域 Region		核苷酸一致性/% Nucleotide dentity			氨基酸一致性/% Amino acid identity			核苷酸一致性/% Nucleotide identity			氨基酸一致性/% Amino acid identity
多聚蛋白Poly protein		71.0 ~ 98.9			85.4 ~ 99.5			76.3 ~ 81.2			83.7 ~ 89.2
P1		72.6 ~ 99.0			70.1 ~ 99.2			67.4 ~ 78.1			59.2 ~ 79.0
HC-Pro		80.5 ~ 98.8			92.8 ~ 100.0			77.8 ~ 85.7			92.8 ~ 97.2
P3		71.0 ~ 98.9			72.8 ~ 99.7			69.1 ~ 84.3			67.1 ~ 87.9
6K1		75.0 ~ 100.0			88.5 ~ 100			76.3 ~ 89.1			88.5 ~ 98.1
CI		78.9 ~ 98.8			78.7 ~ 99.3			77.4 ~ 86.3			89.0 ~ 96.7
6K2		77.4 ~ 100.0			84.9 ~ 100.0			73.6 ~ 89.9			83.0 ~ 98.1
NIa-VPg		76.8 ~ 98.6			68.6 ~ 99.5			77.0 ~ 83.7			90.0 ~ 95.3
NIa-Pro		76.4 ~ 99.2			88.5 ~ 100.0			77.5 ~ 82.7			88.5 ~ 94.2
NIb		76.9 ~ 99.4			85.9 ~ 100.0			76.7 ~ 79.7			85.6 ~ 89.0
CP		77.6 ~ 99.0			78.7 ~ 99.3			77.2 ~ 81.2			77.7 ~ 83.7

重组分离物 Recombinant isolate	主要亲本 Major parental	次要亲本 Minor parental	重组区域 Recombinant region	重组检测方法 Recombination detection method
重组分离物 Recombinant isolate	主要亲本 Major parental	次要亲本 Minor parental	重组区域 Recombinant region	RDP	GENECONV	Bootscan	Maxchi	Chimaera	SiSscan	3Seq
MYH2-SXAK	未知Unknown	MYIA-SXAK	7 854 ~ 15	+	+	+	+	+	+	+
MYC-SXAK	未知Unknown	MYF-SXAK	6 458 ~ 10 126	-	+	+	+	+	+	+
MYH2-SXAK	未知Unknown	MYIB-SXAK	6 011 ~ 124	+	+	+	+	+	+	+
Konjac-sym	MYF-SXAK	AK-sym	4 654 ~ 5 448	+	+	+	+	+	+	+
MYRC-SXAK	SdP	未知Unknown	8 942 ~ 9 344	+	+	+	+	+	+	-
MYIB-SXAK	MYRB-SXAK	未知Unknown	286 ~ 700	+	+	+	+	+	-	+
MYC-SXAK	M13	未知Unknown	315 ~ 441	+	+	+	+	+	+	-
MYF-SXAK	未知Unknown	MYC-SXAK	499 ~ 946	+	+	+	+	+	+	+
MYRC-SXAK	MYRB-SXAK	未知Unknown	1 051 ~ 1 834	+	-	+	+	+	-	+
M9-SXAK	未知Unknown	MYH2-SXAK	685 ~ 905	+	+	+	+	+	+	+
Et26	MYF-SXAK	DsMV-BF8	1 407 ~ 1 893	+	+	-	+	+	+	-
Tz34	未知Unknown	MYH2-SXAK	2 124 ~ 3 089	+	+	-	+	+	+	+
AK-sym	MYH2-SXAK	MYC-SXAK	4 534 ~ 6 436	+	+	+	+	+	+	+
MYH2-SXAK	MYF-SXAK	未知Unknown	56 ~ 1 848	+	+	+	+	+	+	+
Tz34	MYH2-SXAK	Et5	3 392 ~ 4 022	+	+	+	+	+	-	-
BF1	MYRC-SXAK	AA-sym	5 272 ~ 5 765	+	-	+	+	+	+	-
CTCRI-II-14	MYF-SXAK	未知Unknown	8 843 ~ 9 023	+	+	+	+	+	-	-
MYRB-SXAK	DsMV strain I	未知Unknown	411 ~ 684	+	+	-	+	+	+	-
MYH2-SXAK	未知Unknown	SdP	6 018 ~ 2 374	+	-	+	+	+	-	+

[1]	GAO Penghua, QI Ying, LI Lifang, YANG Min, ZHAO Yongteng, GUO Jianwei, HUANG Feiyan, ZHAO Jianrong, KONG Chuisi, DONG Kun, YU Lei. A New Konjac Cultivar‘Zhuyahuang 1’ [J]. Acta Horticulturae Sinica, 2026, 53(S1): 163-164.
[2]	FENG Yidi, LI Lifang, YANG Min, GAO Penghua, GUO Jianwei, HUANG Feiyan, ZHAO Jianrong, KONG Chuisi, DONG Kun, QI Ying, YU Lei. A New Konjak Cultivar‘Zhuyahuang 3’ [J]. Acta Horticulturae Sinica, 2026, 53(S1): 165-166.
[3]	GAO Penghua, QI Ying, LI Lifang, YANG Min, ZHAO Yongteng, GUO Jianwei, HUANG Feiyan, ZHAO Jianrong, KONG Chuisi, DONG Kun, YU Lei. A New Konjac Cultivar‘Kunyu 1’ [J]. Acta Horticulturae Sinica, 2026, 53(S1): 167-168.
[4]	GAO Dandan, LI Lifang, YANG Min, GAO Penghua, GUO Jianwei, HUANG Feiyan, ZHAO Jianrong, KONG Chuisi, DONG Kun, QI Ying, YU Lei. A New Konjac Cultivar‘Kunyu 2’ [J]. Acta Horticulturae Sinica, 2026, 53(S1): 169-170.
[5]	XIE Huimin, ZHANG Yan, QIN Mei, ZHAO Desheng, ZENG Yun, YANG Yuping, YANG Faming, DAI Rong, SUN Jiliang, HU Zhiqiang, LI Yingjie, GU Shunhua. A New Amorphophallus konjac Cultivar‘Chumohua 2’ [J]. Acta Horticulturae Sinica, 2026, 53(S1): 171-172.
[6]	SAILAIJIANG Maierhaba, CHENG Ping, MAIMUTIMIN Mieradili, LI Dan, ABDUSALAM Aysajan. Genetic Diversity Analysis and DNA Fingerprinting Development of Prunus ferganensis Landrace Germplasm Based on SSR [J]. Acta Horticulturae Sinica, 2026, 53(8): 2224-2240.
[7]	LIU Liqin, HU Xiaowen, LI Tianzi, LI Xiang, WANG Jiahui, XUE Zhong, ZHU Lifei, WANG Yi, ZHOU Jiannan, SHI Shengyou. Analysis of Genetic Diversity in Leaf Phenotypic Traits of Hybrid Progenies Between Longan and Litchi [J]. Acta Horticulturae Sinica, 2026, 53(8): 2275-2288.
[8]	XU Huinan, GAO Mengjie, QI Kaijie, CUI Yanbo, WU Xiao, TAO Shutian, ZHANG Shaoling, YIN Hao. Phenotypic Diversity Evaluation of Shoots and Leaves in 264 Pear Germplasm Accessions [J]. Acta Horticulturae Sinica, 2026, 53(5): 1237-1252.
[9]	HU Lingyu, SHI Kaili, WEN Mingling, ZHENG Chaowen, QU Feng, JIANG Xuekuan, NIU Yi, LIU Haili, ZHANG Shenglin. A New Konjac Cultivar‘Muyu 1’ [J]. Acta Horticulturae Sinica, 2025, 52(S2): 195-196.
[10]	LI Lifang, YANG Min, QI Ying, GAO Penghua, GUO Jianwei, ZHAO Yongteng, YANG Shaowu, HUANG Feiyan, LIU Jiani, ZHAO Jianrong, YU Lei. A New Konjac Cultivar‘Zhuyajin 3’ [J]. Acta Horticulturae Sinica, 2025, 52(S2): 201-202.
[11]	ZHONG Shengyuan, LUO Yuting, CHEN Jianfeng, ZHONG Haifeng, CHEN Yuhua, and LIU Zhonghua. Grading of Quantitative Traits and Genetic Diversity in DUS Test of Phalaenopsis Cultivars [J]. Acta Horticulturae Sinica, 2025, 52(7): 1817-1827.
[12]	LI Zuo, XIAO Wenfang, CHEN Heming, and LÜ Fubing. Genetic Diversity and Core Collection Construction of Phalaenopsis Germplasm Resources [J]. Acta Horticulturae Sinica, 2025, 52(6): 1519-1529.
[13]	SUN Pei, ZHANG Hong, YANG Yuan, WANG Hua, LI Maofu, KANG Yanhui, SUN Xiangyi, JIN Wanmei. Genetic Diversity Analysis and Fingerprint Construction of Rosa Germplasm Resources Based on SSR Marker [J]. Acta Horticulturae Sinica, 2025, 52(6): 1539-1552.
[14]	BI Qingrui, CUI Dongsheng, MA Xinyuan, XUE Yuran, ZHANG Shikui, FAN Guoquan, NIU Yingying. Genetic Diversity and Genetic Relationship of Local Pear Cultivars in Xinjiang [J]. Acta Horticulturae Sinica, 2025, 52(3): 561-574.
[15]	LUO Sifang, YAN Xiang, XIE Lifang, SUN Jingxian, GUO Zijing, ZHANG Zuming, CHEN Zhaoxing. Development and Application of Insertion-Deletion（InDel）Markers in Gannan wild Fortunella hindsii Based on Whole Genome Re-sequencing Data [J]. Acta Horticulturae Sinica, 2025, 52(2): 267-278.