The pigmentation patterns of potato tubers are complex and diverse, often exhibiting significant tissue specificity. This study was conducted to elucidate the molecular mechanisms underlying the differential pigmentation in different parts of potato tubers using two cultivars, ‘Huashu 12’ and 15EM36-26, which exhibit opposite pigmentation patterns between the bud eyes and the tuber periderm. Metabolomic analysis revealed that cyanidin, pelargonidin, and malvidin are the key anthocyanin components responsible for the observed pigmentation differences. A total of 118 common differentially expressed genes in the differentially pigmented tissues of both cultivars were identified in transcriptomic analysis, including key structural genes of the anthocyanin biosynthesis pathway (such as StPAL, StCHS, and StDFR). Weighted gene co-expression network analysis was further employed to screen modules significantly correlated with pigmentation phenotypes, and 28 candidate genes associated with anthocyanin biosynthesis were identified. Expression validation demonstrated that the expression of StbHLH14 was significantly higher in non-pigmented tissues compared to pigmented tissues. Functional analysis revealed that StbHLH14 can inhibit the activation of structural gene promoters (such as StCHS and StDFR) via the MYB transcription factor StAN2, thereby negatively regulating anthocyanin biosynthesis. This study unveils the metabolic and transcriptional basis of tissue-specific pigmentation in potato tubers and clarifies the negative regulatory role of StbHLH14.

Cadmium (Cd) soil contamination severely threatens potato production and food safety by accumulating in edible tubers. This study systematically integrated physiology, transcriptomics, and gene validation to elucidate the organ-specific mechanisms by which exogenous zinc (Zn) alleviates Cd toxicity and explores its field potential. Physiological assays demonstrated 50 μM ZnSO₄ supplementation under 100 μM CdCl₂ stress increased biomass over twofold while reducing root and leaf Cd by 57.6 % and 15.4 %, respectively. Transcriptomics revealed organ-specific regulation of Zn in alleviating Cd stress. In roots, Zn downregulated StZIP3/4/5 (ZIPs family) and upregulated StPCR2/8/9 (PCRs family), suppressing Cd uptake and enhancing efflux, respectively. Zn concurrently regulated antioxidant defense (SOD and POD decreased 22.2-23.9 %), osmoregulation (PRO reduced 42.8 %), and alleviated membrane damage (MDA decreased 25.2 %). Simultaneously, Zn mitigates metabolic overload by blocking the hyperactivation of phenylpropanoid metabolism in roots and glutathione-based detoxification in leaves. Functional analyses demonstrated that plasma membrane-localized StPCR9 facilitates Cd and Zn efflux in potato. Its overexpression increased biomass by approximately 2-fold under Cd stress while reducing Cd accumulation in organs. Conversely, StZIP5 overexpression decreased biomass by 15.0-20.5 % and increased Cd accumulation. Critically, field application (37.5 and 75.0 kg·hm-2 ZnSO4) reduced tuber Cd by 64.2-66.3 % (primarily via about 60.0 % reduction in stem-to-tuber translocation), significantly lowering dietary Cd risk, while concurrently enhancing tuber Zn (>3 μg·g⁻¹ FW) for improved nutritional quality. This integrated approach elucidates the coordinated organ-specific defense of Zn and provides a field-validated strategy for safer potato production in Cd-contaminated soils.

Plant viruses, constrained by their limited genomic coding capacity, rely significantly on host factors for successful infection. Disruption of these essential host factors can confer resistance to viruses, with such factors categorized as susceptibility genes or recessive resistance genes. Recent research has identified developmentally regulated plasma membrane polypeptide (DREPP) proteins as susceptibility factors integral to the cell-to-cell movement of potyviruses. In the present study, we demonstrated that the silencing of StPCaP1, a DREPP gene in potato, confers novel resistance to both Potato virus Y (PVY, Potyvirus) and Potato virus S (PVS, Carlavirus). Interaction and subcellular localization analyses revealed that the movement proteins (MPs) of PVY (P3NPIPO) and PVS (TGB1) interact with StPCaP1, recruiting it to plasmodesmata (PD). Furthermore, transcriptome analysis and experimental validation indicated that compared to wild-type (WT) controls, StPCaP1-silenced lines exhibit significantly increased glucose content and elevated expression levels of several UDP-glucosyltransferases (UGTs), which are potential components of the callose synthesis complex. These findings suggest that StPCaP1 participates in callose deposition, as evidenced by the increased callose deposition at PD and reduced PD permeability observed in StPCaP1-silenced lines. Additionally, we found that StPCaP1 expression in Nicotiana benthamiana led to reduced callose deposition at PD and promoted PVY-GFP cell-to-cell movement in NbPCaP1-silenced plants in a concentration-dependent manner, which suggests the changes in callose deposition at PD induced by StPCaP1 relates to viral cell-to-cell movement. This study provides a deeper understanding of DREPP-mediated viral movement and highlights potential targets for developing virus-resistant crops.

Vascular bundles regulate water balance, nutrient uptake and transport, and stress responses, ultimately influencing the yield and quality of crops. However, our understanding of the genetic functions of microRNAs (miRNAs) during vascular development remains limited. In this research, the role of miR169a in potatoes was studied. Silencing StmiR169a in potatoes promoted vascular bundle formation, resulting in not only upright and robust stems but also longer roots and more extensive root systems. Histological analysis revealed a significant increase in the number of xylem vessels in the vascular bundles of stems and roots of RNAi-mediated miR169a lines (STTM169). Silencing miR169a led to higher water use efficiency, enhanced photosynthesis rates, elevated enzymatic antioxidant activity, and reduced levels of reactive oxygen species (ROS), thereby enhancing the drought resistance of potatoes. However, overexpression of miR169a lines (OE169a) showed the opposite effects. The nuclear factor Y subunit NF-YA3 was identified as a target gene of StmiR169a. The miR169a/NF-YA3 module may be involved in the regulation of potato vascular bundle development and the response to drought stress.

Anthocyanin biosynthesis is affected by light, temperature, and other environmental factors. The regulation mode of light on anthocyanin synthesis in apple, pear, tomato and other species has been reported, while not clear in potato. In this study, potato RM-210 tubers whose peel will turn purple gradually after exposure to light were selected. Transcriptome analysis was performed on RM-210 tubers during anthocyanin accumulation. The expression of StMYBA1 gene continued to increase during the anthocyanin accumulation in RM-210 tubers. Moreover, co-expression cluster analysis of differentially expressed genes showed that the expression patterns of StMYBA1 gene were highly correlated with structural genes CHS and CHI . The promoter activity of StMYBA1 was significantly higher in light conditions, and StMYBA1 could activate the promoter activity of structural genes StCHS , StCHI , and StF3H . Further gene function analysis found that overexpression of StMYBA1 gene could promote anthocyanin accumulation and structural gene expression in potato leaves. These results demonstrated that StMYBA1 gene promoted potato anthocyanin biosynthesis by activating the expression of structural genes under light conditions. These findings provide a theoretical basis and genetic resources for the regulatory mechanism of potato anthocyanin synthesis.

[目的]综合分析我国不同产区马铃薯品种的主要品质性状,为今后马铃薯育种目标的制定及种质资源的利用提供参考.[方法]从我国华北、西北、西南马铃薯主产区收集48个国内种植广泛且性状优良的马铃薯栽培品种,测定鲜薯的干物质、淀粉、总糖、可溶性糖和还原糖含量,采用相关分析、主成分分析、聚类分析及遗传多样性分析等方法对不同产区马铃薯品种的品质性状进行综合分析.[结果]48个马铃薯品种的干物质含量在13.71％～20.01％,平均值为16.85％;淀粉含量在7.94％～15.72％,平均值为11.24％;其中,中薯17号、中薯5号、陇薯7号和康尼贝克的干物质和淀粉含量较高,具有作为全粉或淀粉加工品种的潜力.48个马铃薯品种鲜薯总糖含量在55.25～287.70 mg/g,平均值为140.10 mg/g;可溶性糖含量在2.60～26.78 mg/g,平均值为7.81 mg/g;还原糖含量在0.16～6.08 mg/g,平均值为3.12 mg/g;其中,云薯304、中薯16号、中薯26号、大西洋(石家庄)和中薯18号的还原糖含量较低.不同产区马铃薯品种品质性状存在差异,河北张家口和甘肃兰州的马铃薯品种干物质和淀粉含量较高;云南昆明和河北石家庄的马铃薯品种干物质和淀粉含量相对较低;云南昆明和河北张家口的马铃薯品种还原糖含量较低.相关分析结果显示,干物质含量与淀粉含量呈极显著正相关(P<0.01),与总糖含量呈显著负相关(P<0.05).聚类分析将48个马铃薯品种分为3类,第I类包含青薯168、HF-10、丽薯10号和陇薯7号,具有较高的干物质、淀粉和总糖含量;第Ⅱ类包含青薯6号、青薯9号(西宁)、下寨65、丽薯6号、青薯10号和乐薯1号,具有较低的总糖含量;其余品种无明显的优势性状特点.5个品质性状的遗传多样性指数在1.77～2.03,总糖含量的遗传多样性指数最低,淀粉含量的遗传多样性指数最高.[结论]我国马铃薯品种干物质和淀粉含量总体水平较低,具有较大提升空间;将近一半的品种还原糖含量满足油炸食品生产要求.与淀粉和干物质含量相比,糖含量受环境因素及栽培措施的影响较大.

为研究不同生态区域的 8 个马铃薯品种对湖南生态条件的适应性,分别于 2019 年春季和秋季在湖南农业大学耘园基地进行了比较试验.结果表明:除合作 88 与青薯 9 号外,其他品种马铃薯株高均为秋季高于春季;中薯 18 号、丽薯 6 号和合作 88 春季和秋季均开花,陇薯 7 号与青薯 9 号只在春季开花,其他 3 个品种两季均不开花;各品种春季产量为 20.27～44.84 t/hm2,秋季产量为 8.72～36.44 t/hm2,春季产量高于秋季;冀张薯 12 号春季和秋季产量均为最高,而尤金最低.一般线性模型分析结果表明,季节和品种对产量的影响极显著.综合分析,冀张薯 12 号、青薯 9 号、中薯 18 号、陇薯 7 号在湖南地区春、秋季均适合栽培,中薯 5 号适合春季栽培,而尤金、丽薯 6 号和合作 88 不适合在湖南地区栽培.

Light-induced greening of tubers seriously affects its safety and economic benefits, but the mechanism of light-induced chlorophyll synthesis in potato tubers remains unclear. In this study, the related metabolites of potato tubers with different light durations were analyzed. The results were as follows: When the light duration prolonged, the chlorophyll content of the tubers gradually increased. Moreover, the chlorophyll content increased significantly at 36 hours, with which the tuber skin turned green obviously. Transcriptome sequencing and bioinformatics analysis were carried out on the samples taken at 0 hour, 6 hours, and 36hours, and 5646 differentially expressed genes（DEGs）were identified. According to the co-expression cluster analysis and quantitative RT-PCR verification results, 9 major structure genes of chlorophyll biosynthesis pathway（StGAS1, St CHLD, StCrd1,StHEMA, StGUN4, St PORA, St UROD, StCHLM, and StCHLG）and 6 transcription factors（St SBP, StLSD, St GATA, StWRKY,StMYB-like, and StMYB113）were significant induced. Predictions of the cis-acting elements of the promoter sequences of these 9structural genes indicated that they all contained multiple MYB binding sites. Promoter element analysis and transcriptional activation validation further revealed that StMYB113 had a light-responsive element and could activate the expression of StUROD in tobacco. Therefore, StMYB113 may be light-responsive and be able to regulate potato tuber greening in the light. This study provides a reference for the research on the regulatory mechanism of light-induced chlorophyll synthesis in potato tubers, which is important for reducing the loss caused by greening of potato tubers.

为提高秋马铃薯产量,降低种薯成本,以华薯1号、兴佳2号为供试品种,研究不同种植密度对秋马铃薯的生长及产质量的影响.结果表明:种植密度对2个马铃薯品种的茎粗、SPAD值、主茎数、产量和单株结薯数影响显著,对块茎品质影响不显著;其中,茎粗和SPAD值随种植密度增加呈下降趋势,株高和主茎数随种植密度增加呈上升趋势;不同品种的适宜种植密度不同,华薯1号种植密度为4100株/667m2时产量最高,为1947.98 kg/667m2,而兴佳2号的种植密度为5100株/667m2时产量最高,为1537.52 kg/667m2.

为了解湖南省马铃薯种薯质量和主要病毒病发生情况,2019年-2020年马铃薯秋作和冬作期间,对长沙、益阳、湘潭、澧临等马铃薯生产区的155个马铃薯样品,运用反转录-聚合酶链式反应(RT-PCR)和双抗体夹心酶联免疫吸附检测(DAS-ELISA)技术,筛查6种主要马铃薯病毒,包括马铃薯X病毒Potato virusX(PVX)、马铃薯Y病毒Potato virus Y(PVY)、马铃薯M病毒Potato virus M(PVM)、马铃薯S病毒Potato virus S(PVS)、马铃薯A病毒Potato virus A(PVA)、马铃薯卷叶病毒Potato leaf roll virus (PLRV).检测结果表明:6种马铃薯病毒病在湖南均有不同程度的发生,单一和两种病毒复合感染植株占比最高,其次是3种病毒复合感染,存在极少数植株复合感染4～5种病毒病情况.在秋作马铃薯中,PVY检出率达到29.41％;PVS和PVA检出率均为27.94％;PVM、PVX、PLRV的检出率分别为20.59％、19.12％、17.65％.在冬作马铃著中,PVX检出率最高,达到31.03％;其次是PLRV,检出率为25.29％;PVS、PVM、PVA、PVY的检出率依次为19.54％、16.09％、10.34％、5.75％.综上所述,近年来湖南地区马铃薯病毒病发生有抬头之势,其中PVX和PVY最为严重,复合感染增加,受天气和种源影响,秋作马铃薯比冬作马铃薯情况严重.

通过田间调查及生理生化测试,分析比较了紫甘薯浙紫薯1号野生型及其芽变突变体植株的植物学特征、光合特性、农艺性状、产量及块根品质的差异.结果表明:与野生型相比,突变体茎粗加大,茎长和节间长度显著变短,生长势旺盛;野生型茎和根系为紫色,突变体茎和根系颜色分别为绿色和白色;突变体叶片净光合速率高于野生型;突变体单株结薯数减少,单株产量和单位面积产量显著增加;野生型薯皮、薯肉均为紫色,其花青素含量分别为666.0、536.7 mg/kg,突变体薯皮和薯肉颜色分别为白色和黄色,其花青素含量分别为15.3、11.2 mg/kg,显著低于野生型;突变体块根干物质含量和淀粉含量高于野生型,块根蛋白质含量显著低于野生型,块根食味品质评分为8.9分,显著高于野生型,味粉甜,有板栗香味,粗纤维较少.

In various plant species, many transcription factors (TFs), such as MYB, bHLH, and WD40, have been identified as regulators of anthocyanin biosynthesis in underground organs. However, the regulatory elements of anthocyanin biosynthesis in the tuberous roots of sweet potato have not been elucidated yet. Here, we selected the purple-fleshed sweet potato cultivar "Zhezi1" (ZZ(P)) and its spontaneous yellow-fleshed mutant "Xinli" (XLY) to investigate the regulatory mechanism of the anthocyanin biosynthesis in the tuberous roots of sweet potato. By analyzing the IbMYB1 genotype in ZZ(P) and XLY, we found that the IbMYB1-2, a MYB TF involved in anthocyanin biosynthesis, was missing in the XLY genome, which might lead to an extreme decrease in anthocyanins in XLY. A comparative transcriptome analysis of ZZ(P) and XLY was conducted to find the TFs involved in anthocyanin biosynthesis in ZZ(P) and XLY. The anthocyanin structural genes were significantly enriched among the differentially expressed genes. Moreover, one MYB activator (IbMYB1), one bHLH (IbbHLH2), three WRKY activator candidates (IbWRKY21, IbWRKY24, and IbWRKY44), and two MYB repressors (IbMYB27 and IbMYBx-ZZ) were highly expressed in ZZ(P) accompanied with anthocyanin structural genes. We also tested the expression of these TFs in six purple- and two orange-fleshed sweet potato cultivars. Interestingly, most of these TFs were significantly positively correlated with anthocyanin contents in these cultivars. The function of the anthocyanin biosynthesis repression of IbMYB27 and IbMYBx-ZZ was verified through transient co-transformation with IbMYB1 into tobacco leaves. Further functional verification of the above TFs was conducted by Y2H, BiFC, and dual-luciferase assays. These tests showed that the MYB-bHLH-WD40/MYB-bHLH-WD40-WRKY complex activated the promoter of anthocyanin structural gene IbDFR and promoters for IbWRKY44, IbMYB27, and IbMYBx-ZZ, indicating reinforcement and feedback regulation to maintain the level of anthocyanin accumulation in the tuberous roots of purple-fleshed sweet potato. These results may provide new insights into the regulatory mechanism of anthocyanin biosynthesis and accumulation in underground organs of sweet potatoes.

对低温贮藏5 d的低温糖化不敏感品种'华薯三号'和敏感品种'中薯五号'马铃薯块茎进行转录组测序,通过对差异表达基因的生物信息学分析,获得与植物激素相关的差异表达基因,其中6个与植物激素合成或信号转导有关的差异表达基因与糖分解代谢密切相关.结果表明:KOox2和GA3ox1是马铃薯块茎中赤霉素合成的关键酶基因,赤霉素可刺激淀粉酶和转化酶活性,加剧块茎还原糖的积累,是马铃薯低温糖化的正调控因子;ANT和AIL6属于参与乙烯响应的AP2转录因子家族;BRI1和BKI1是油菜素内酯信号通路中的转录因子,两者互作共同拮抗14–3–3蛋白质活性;ANT、AIL6、BRI1和BKI1这4个转录因子通过负调控转化酶基因的表达而影响还原糖的产生,是马铃薯低温糖化的负调控因子.

Due to their limited coding capacity, plant viruses have to depend on various host factors for successful infection of the host. Loss of function of these host factors will result in recessively inherited resistance, and therefore, these host factors are also described as susceptibility genes or recessive resistance genes. Most of the identified recessive resistance genes are members of the eukaryotic translation initiation factors 4E family (eIF4E) and its isoforms. Recently, an eIF4E-type gene, novel cap-binding protein (nCBP), was reported to be associated with the infection of several viruses encoding triple gene block proteins (TGBps) in Arabidopsis. Here, we, for the first time, report that the knockdown of nCBP in potato (StnCBP) compromises the accumulation of potato virus S (PVS) but not that of potato virus M (PVM) and potato virus X (PVX), which are three potato viruses encoding TGBps. Further assays demonstrated that StnCBP interacts with the coat proteins (CPs) of PVS and PVM but not with that of PVX, and substitution of PVS CP in the PVS infectious clone by PVM CP recovered the virus infection in StnCBP-silenced transgenic plants, suggesting that the recognition of PVS CP is crucial for StnCBP-mediated recessive resistance to PVS. Moreover, the knockdown of nCBP in Nicotiana benthamiana (NbnCBP) by virus-induced gene silencing suppressed PVX accumulation but not PVM, while NbnCBP interacted with the CPs of both PVX and PVM. Our results indicate that the nCBP orthologues in potato and tobacco have conserved function as in Arabidopsis in terms of recessive resistance against TGB-encoding viruses, and the interaction between nCBP and the CP of TGB-encoding virus is necessary but not sufficient to determine the function of nCBP as a susceptibility gene.

在冬闲稻田用白膜覆盖、白膜膜上覆土(简称白膜覆土)、黑膜覆盖、黑膜膜上覆土(简称黑膜覆土)、稻草覆盖等5种覆盖方式栽培马铃薯'兴佳2号',分析覆盖方式对马铃薯出苗、生长势、产量和马铃薯块茎品质的影响.结果表明:各覆盖栽培方式出苗均比裸地(对照)早,其中白膜覆盖出苗最早,比对照早17 d;与对照相比,各覆盖栽培方式的植株株高、SPAD值和主茎数增加;块茎产量显著高于对照,其中白膜覆盖产量最高,为34.87 t/hm2,显著高于白膜覆土的,但黑膜覆盖与黑膜覆土间产量差异不显著;不同覆盖方式的马铃薯块茎干物质含量为15.46％～16.74％;黑膜覆土的绿薯率最低,为2.56％;各覆盖方式的马铃薯龙葵素含量4.65～9.76 mg/100 g,其中黑膜覆盖的最低;块茎镉含量在0.029～0.042 mg/kg,白膜覆盖的最高.综合来看,黑膜覆盖及黑膜覆土的产量较高,且绿薯率、龙葵素含量低、块茎镉含量不超标,较适合冬闲田早春马铃薯栽培.

The production of potato (Solanum tuberosum L.) faces a severe challenge due to the salinization of arable land worldwide. The cultivation of salt-tolerant potatoes is of great significance to ensure food security. In this study, two cultivars of ‘Longshu 5’ and ‘Qingshu 9’ were compared for physiological responses to salt stress, and then the salt tolerance of the two cultivars were assessed via principal component analysis. Furthermore, the Na+, K+, and Ca2+ flux of the cultivars under salt stress was recorded. Finally, the expression levels of ion transport-related genes and transcription factors in salt-tolerant cultivars were explored under NaCl stress. The results showed that the seven physiological indicators of salt tolerance were differed between the cultivars. Interestingly, soluble protein and sugar were early responsive to salt stress than proline in the salt-tolerance cultivar. Peroxidase and superoxide dismutase activity were significantly different in ‘Longshu 5’ under NaCl stress and without being significantly different in ‘Qingshu9’. In addition, the salt tolerance of ‘Longshu 5’ was more tolerant than ‘Qingshu 9’ based on principal component evaluation. Meanwhile, the strong efflux of Na+, the stability of K+, and the high absorption of Ca2+ in ‘Longshu 5’ indicated salt adaption mechanisms in the salt-tolerant potato. In addition, we found that ion transport-related genes and transcription factors, such as StSOS1, StNHX4, StAKT1, StNAC24, and StCYP707A, played a role in the salt tolerance of ‘Longshu 5’. In conclusion, the salt-tolerant potato can regulate physiological substances to adapt to salt stress, and ion transport related genes and transcription factors play a role in improving salt tolerance.

In order to elucidate the contributions of JA in orchestrating disease resistance in potato plants, the potato genotype ‘SD20’, which exhibits strong resistance against the highly virulent Phytophthora infestans isolate CN152, while infected by the super virulent isolate 2013-18-306, was treated with exogenous JA and then challenged by inoculation with 2013-18-306. The results showed that exogenously applied JA significantly delayed the onset and alleviated the symptoms of late blight, indicating exogenous JA could induce resistance to P. infestans in the early biotrophic stage of infection in ‘SD20’ plants. To further clarify the role of JA in the early defense response and identify key genes involved in JA signal transduction, gene expression profiling via RNA sequencing（RNA-seq） in ‘SD20’ plants treated with exogenously applied JA was performed. A total of 2 927 differentially expressed genes were specifically induced, the majority encoded transcription factors, protein kinases, secondary metabolites, defense enzymes and disease resistance related proteins. GO functional annotation and KEGG metabolic pathway analysis showed that exogenously applied JA rapidly induced the expression of genes related to immune response regulation, pathogen defense, and other biological processes, and stimulated endogenous JA synthesis and signal transduction, and the overall early pathogen defense response in‘SD20’. These results provide useful information in understanding the JA’s function involved in pathogen defense responses and a theoretical basis for the application of JA in potato production.

加强协同创新是培养创新型人才和建设创新型国家的内在要求.当前,地方农业院校在科技创新能力、创新人才培养等方面与部属高校相比仍存在较大的差距.该文分析了地方农业院校博士生培养现状及不足,提出了共建协同创新中心、建立研究生联合培养基地、开展联合培养和合作研究等协同创新模式,并从改革招生录取方式、修订培养方案等方面对博士培养模式的改革与实践进行了总结.

为筛选适合湖南周年生产的品种,对引进的14个马铃薯品种(系)在春季和秋季进行比较试验,观察其农艺性状,分析块茎品质.结果表明,各品种(系)春季和秋季的农艺性状均较好;春季各品种(系)产量在1484～3195 kg/667m2,其中'华薯13号'08CA9668-15'07HE110-6'08HE077-15'北方002'北方009'09HE039-1'华彩1号'华薯8号'F04046'和'华薯6号'的产量显著高于对照品种'中薯5号',各品种(系)块茎干物质含量在14.07％～22.57％.秋季各品种(系)产量在1108～2372 kg/667m2,其中'华薯6号'07HE110-6'09HE039-1'和'北方009'的产量显著高于对照,各品种(系)干物质含量在16.57％～22.37％.各品种(系)春季产量高于秋季产量.春秋2季'华薯6号'07HE110-6'09HE039-1'北方009'北方002'08HE077-15'华薯13号'08CA9668-15'华薯8号'F04046'的周年产量显著高于对照,较对照增产18.09％～40.89％,适合湖南地区周年栽培.

湖南秋马铃薯播种正值高温干旱,病毒病发生严重.该研究以"费乌瑞它"的脱毒微型薯和小个商品薯为试验材料,研究不同时期喷施抗病毒药剂盐酸吗啉胍对马铃薯生长及产量的影响.结果表明,不同种薯级别的马铃薯产量差异不显著.其中,小个商品薯各处理的产量在14.81～17.15t/hm2,平均产量高于脱毒微型薯.种薯级别和抗病毒药剂共同影响马铃薯的产量,仅齐苗期喷施药剂的小个商品薯的总产量、商品薯产量和商品薯率最高,分别为17.15t/hm2、15.59t/hm2、90.91％.