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Current Issue
2024 Vol.1 Issue.8,
Published 2024-08-01
1
Comparative Analysis on International Competitiveness of Spicy Vegetables in China
WANG Mengwei，HE Zejia，BAI Li,WANG Zhe
Hot!
The development of spicy vegetable export trade plays an important role in promoting the international competitiveness of China’s vegetable trade．On the basis of analyzing the export scale and export market structure of spicy vegetables，this paper selected data from 2014 to 2022 and utilized international market share，indicative comparative advantage index，and competitive advantage index and other competitiveness indicators to calculate and compare the international competitiveness of 4 spicy vegetables．They were ginger，chili，onion，and garlic．The diamond model was used to analyze the factors aff ecting the competitiveness of China’s spicy vegetables．Research found that the development of China’s spicy vegetable export trade on the whole was showing a good momentum．Judging from the international market share and displayed comparative advantage index，garlic and ginger had excellent international competitive advantages．Finally，the paper put forward suggestions to enhance the overall competitiveness of spicy vegetables；improve product quality and planting technology；strengthen brand building and capital investment；and actively develop diversifi ed markets，etc．
2024 Vol. 1 (8): 1-8 [
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Development Status and Countermeasures for Winter Vegetable Industry in Guangdong Province
CHU Xialing，XIE Dasen，LI Tao
Winter vegetable production in Guangdong Province is an important industry，which can ensure the supply of ‘vegetable baskets’all over China and increase farmers’income. This paper analyzed the current development status and existing problems for winter vegetable industry in Guangdong Province by data analysis and industry research. At the same time，this paper put forward specific countermeasures and suggestions. The results showed that the sowing areas and yield of winter vegetable production in Guangdong Province were stable. Its level of industrial development was gradually improved and sales areas were extended all over the country，achieving better results. But，many problems were still existing，like increasingly fi erce market competition，lacking of information guidance，slow technological updating，low level of standardization，weak brand building，and many land use obstacles，etc. Therefore，the following suggestions were put forward：strengthening adaptation to local conditions，adopting measures tailored to local conditions，executing policy according to diff erent classifi cations，optimizing the market position for winter vegetable production，carrying out technical research for improving quality and effi ciency of winter vegetable production，realizing integration and demonstration，establishing a number of standardized seedling breeding bases，building and promoting regional public brands of winter vegetables，perfecting winter vegetable production facilities and equipment，and formulating measures to ensure the development of winter vegetable industry.
2024 Vol. 1 (8): 9-14 [
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Investigation on Irrigation Status for Small Fruit Type Watermelon and Melon in Beijing
YUE Huanfang，ZHANG Xu emei，HU Xiaoyi，AN Shunwei，MENG Fanyu，ZONG Jing
This study investigated and surveyed the irrigation conditions of 116 small fruit type watermelon and melon growers in 7 districts of Be ijing；and analyzed the irrigation water source，irrigation method and irrigation system. The results showed that only 43.5% of the planting parks had both frequency conversion and fi ltration equipment at the head of the irrigation shaft. Individual farmer households only accounted for 15.9%. And 57.0% of the respondents adopted water-saving irrigation method，47.7% of them adopted drip irrigation，and 9.3% of them used micro jet. The irrigation volume for small fruit type watermelon in spring was mainly 1 500～2 250 m3 · hm-2 （taking 35.4%）. The irrigation volume for small fruit type watermelon in autumn was less than 1 500 m3 · hm-2 （taking 46.3%）. While，the irrigation volume for spring melon was mainly less than 1 500 m3 · hm-2 （taking 52.6%）. In response to the existing problems，the paper puts forward suggestions for future development. They were perfecting integration system，optimizing water-saving irrigation mode，and increasing promotion eff ort，etc.
2024 Vol. 1 (8): 15-18 [
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Research Progress of Volatile Aroma Compounds in Pepper Fruits
CUI Sufei，SHAN Qingyun，XIAO Jianmei，WU Yueliang，XIONG Cheng
Hot!
Aroma is one of the important traits to measure the quality of pepper fruits．With the development of pepper breeding towards high quality，research on aroma compounds of pepper fruits has received increasing attention．This paper reviewed the domestic and international research progress on the volatile aroma compounds in pepper fruits，outlined the means of separating and identifying the aroma components，and summarized the differences of sensory contribution，composition and content of aroma components among varieties，mature period and fruit parts．The synthetic pathway of main aroma components and the related regulatory genes were also summarized，and the problems and prospects of the current research on volatile aroma compounds in peppers were discussed in order to provide references for the future research and breeding and selection work on pepper aroma．
2024 Vol. 1 (8): 19-27 [
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Research Progress on Spinach Quality Breeding
ZHANG Chunnan,CHEN Haili,CUI Yanling，YU Pingbin，ZHAO Nan，QIAN Zongwei
Spinach is rich in nutrients，cultivated and consumed worldwide．This article described the quality breeding of spinach from three aspects：appearance quality，nutritional quality and processing quality．The appearance quality of spinach was mainly aff ected by genetics，temperature，light quality，water quality，fertilizer and hormones．The nutritional quality was mainly aff ected by genetics，variety，cultiv ation pattern and sowing period，fertilizers，and other factors．The processing quality was mainly affected by processing mode．Lastly，countermeasures and suggestions for breeding spinach with high nutritional quality are proposed．This article provides reference for the screening and creation of germplasm resources in the process of spinach quality breeding in China．
2024 Vol. 1 (8): 28-36 [
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Screening of Eggplant qRT-PCR Internal Reference Genes under Different Tissues and Adversity Stresses
DENG Jiashuo，FENG Cheng，ZHANG Longhao，YANG Xu
Hot!
To screen for suitable internal reference genes in eggplant under diff erenttissues and adversity stresses，UBC，EF-1a，18S，Actin，GAPDH，β-TUB，L33 and EF2，eight candidate internal reference genes were selected in this study under eight experimental conditions，including flood stress，drought stress，cold stress，heat stress，Verticillium dahliae infestation，salt stress，salicylic acid treatment and different tissue sites．The stability of candidate internal reference genes was analyzed using geNorm，NormFinder，ΔCT，Bestkeeper and RefFinder under eight test conditions．The results showed that Actin was the most stable internal gene among all samples，cold stress，heat stress，Verticillium dahliae infestation and salt stress，β-TUB was the most stable gene expressed under flooding stress，EF2 was the most stable under drought stress，EF-1a was the most stable gene expressed under salicylic acid treatment，and 18S was the most stable among different tissue sites．UBC，L33 and GAPDH were not stably expressed under all treatments．This study provides stable internal reference genes for the study of gene specific expression in different tissues of eggplants and under adversity stress．
2024 Vol. 1 (8): 37-46 [
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Identification and Analysis of NBS-LRR Family Genes in Dioscorea opposita Based on Transcriptome Sequencing
LI Shunpeng，LI Chaochuang，WANG Lanning，ZHANG Hao，WANG Ruifei，LI Mingjun，YANG Qingxiang
To explore the role of NBS-LRR resistance genes in response to different fungal infections in ‘Tiegun’ yam，NBS-L RR genes DoRGA2 and DoRGA4 were amplified from the genome of ‘Tiegun’ yam by homologous cloning．RT-qPCR analysis revealed that the infection of the black spot disease pathogenic fungus Alternaria alternata and the endophytic fungus Penicillium halotolerans could induce the up-regulated expression of DoRGA2 and DoRGA4 in different degrees．Meanwhile，RNA-seq was performed to analyze the NBS-LRR family genes of ‘Tiegun’ callus infected by A. alternata and P. halotolerans，the results showed that a total of 47 NBS-LRR family genes were identified，including 5 types of N，NL，CN，CNL and TN，with 24，15，3，3 and 1 gene，respectively．Furthermore，different subfamilies of NBS-LRR proteins had diff erent evolutionary paths，and these proteins were mainly acidic proteins with hydrophilic properties，and were mainly located in the cell membrane or cytoplasm．In addition，among these NBS-LRR family genes，the expressions of TRINITY_DN9146_c0_g1，TRINITY_DN8009_c1_g1，TRINITY_DN49830_c0_g1 and TRINITY_DN39475_c0_g1 were significantly up-regulated after inoculation with A. alternata，while TRINITY_DN18700_c0_g3 was significantly up-regulated after infection with P. halotolerans．
2024 Vol. 1 (8): 47-57 [
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Effects of Low Temperature Pretreatment on Anther Culture and Physiological Index in Pepper
DING Zijian，ZHANG Junhua，WU Lili，TANG Xiaoling，JIANG Qingqing，CHENG Weitao，YANG Bozhi，ZHOU Shudong
In order to further improve the anther culture efficiency of pepper，taking pod pepper XR1 as the experimental material，the eff ects of pretreatment of fl ower buds at normal temperature（25 ℃，CK）and low-temperature（0、4、8 ℃）on the efficiency of XR1 anther culture and changes in physiological indicators were studied．The results showed that compared with normal temperature，after low-temperature pretreatment of flower buds，the anther browning rate was significantly reduced，and the induction rate of embryoids was significantly increased．In addition to the significantly reduced MDA content in anthers，the contents of stress-resistant substances（soluble proteins，soluble sugars，Pro）and the activities of antioxidant enzymes （POD，PPO）were signifi cantly increased．The anther browning rate was the lowest under 0 ℃ treatment，the induction rate of cotyledon-shaped embryoids was the best under 4 ℃ treatment，and the induction rate of non-cotyledon-shaped embryoids was the best under 8 ℃ treatment．Among the anthers，except for the highest MDA content under 0 ℃ treatment，the other physiological indicators reached the highest values under 4 ℃ treatment．Correlation analysis showed that there was a negative correlation between the anther browning rate and the induction rate of embryoids（cotyledon-shaped and non-cotyledon-shaped），and there was an extremely signifi cant negative correlation with the MDA content and the strongest correlation，with a correlation coeffi cient of -0.967．The induction rates of both cotyledon-shaped and non-cotyledon-shaped embryoids were extremely significantly positively correlated with the soluble sugar content in the resistance index and had the strongest correlation，with correlation coefficients of 0.837 and 0.784，respectively．Only cotyledon-shapedembryoids could induce tissue culture seedlings during anther culture，and the pretreatment of flower buds at 4 ℃ had the best eff ect．The research results can provide a theoretical basis for in-depth analysis of the benefits of low-temperature pretreatment in improving the efficiency of pepper anther culture．
2024 Vol. 1 (8): 58-64 [
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Effects of Organic Fertilizer Replacing Chemical Fertilizer on Yield，Quality and Soil Fertility of Muskmelon in Greenhouse
LIANG Jinying,WANG Xian’gang,REN Huaidong，ZHAO Zichao
To address issues such as decreased soil fertility，reduced yield，and quality degradation in muskmelons because of the excessive use of chemical fertilizers，a study was conducted using ‘Hongjinmi’muskmelon as the experimental material．The study conducted field plot experiments with four treatments：conventional fertilization（CON），optimized fertilization（OPT），organic fertilizer replacing 15% of chemical fertilizer in addition to the optimized fertilization（OF1），and organic fertilizer replacing 30% of chemical fertilizer（OF2）．The objective was to assess the effects of various fertilization methods on the yield，quality，soil fertility，and economic outcomes of muskmelons in greenhouse．Results indicated that，compared to the CON treatment，the OPT，OF1，and OF2 treatments led to muskmelon yield increases of 1.70%，5.58%，and 9.82%，respectively． VC content was elevated by 41.9%，86.1%，and 62.3% respectively；nitrate content was reduced by 39.0%，49.1%，and 52.2%；soluble solids content rose by 3.4%，9.4%，and 10.1%；and acidity levels fell by 21.3%，32.0%，and 30.7%，thereby improving the quality of the muskmelons．Substituting chemical fertilizers with organic options also enhanced soil fertility．In comparison to the CON treatment，the OPT，OF1，and OF2 treatments boosted the soil’s organic matter content by 6.4%，11.4%，and 15.5%，enhancing the levels of available nutrients and the nutrient activation coefficient，as well as decreasing soil bulk density．From an economic standpoint，the OPT，OF1，and OF2 treatments resulted in profit increases of 1.23%（3 349 yuan · hm-2），5.84%（15 964 yuan · hm-2）and 11.5%（31 492 yuan · hm-2），respectively．Consequently，in areas with favorable soil conditions，using organic fertilizer instead of chemical fertilizer proved to be an effective strategy for improving the yield，quality，soil fertility，and economic outcomes of muskmelons in greenhouse，achieving optimal results when substituting 30% of chemical fertilizer with organic fertilizer on top of optimization．
2024 Vol. 1 (8): 65-74 [
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Analysis of Occurrence Dynamics of Allothrombium ovatum and Melon Aphids in Facility Watermelon
SHE Xiaoling，WANG Shaoli，ZHOU Chengxian，WU Dan，HE Jiting，LYU Yang，LIU Lijuan
Melon aphid（Aphis gossypii）is an important limiting factor for facility watermelon production．During field survey，we discovered in spring facility cultivation there was a certain amount larva of Allothrombium ovatum ．Whether these larvae could inhibit the population of melon aphid? It was currently unclear．This study conducted monitoring on larva of Allothrombium ovatum and contemporaneous population of melon aphid ，in 2 watermelon plastic-covered tunnels without chemical application at Yanqing district of Beijing；and also analyzed their occurrence dynamics．The results showed that in Yanqing plastic-covered tunnel and watermelon fields the main occurrence stage for Allothrombium ovatum was from May 19th to June 15th．These mites were either free crawling or parasitic on the body of melon aphids．In 2 watermelon plasticcovered tunnels the naturally occurring mite strain rates could reach as high as 26.67% and 33.33%．The number of mites per hundred stains could reach 83.33 heads and 100 heads．Meanwhile，the highest rate of aphid was 26.67% in the same period. Subsequently，the melon aphid populations declined．The exponential population growth trend under suitable environment was not yet presented，indicating that in spring facility watermelon plastic-covered tunnel Allothrombium ovatum could suppress the population of melon aphid in suitable climate years．Attention should be paid to the protection and utilization in production．
2024 Vol. 1 (8): 75-79 [
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The Effects of Inoculated Arbuscular Mycorrhizal Fungi on the Growth and Mineral Element Uptake of Green Onion Seedlings
CHEN Yixuan，XIE Kunhao，WANG Xiaoqin，YAN Yan，LI Yansu，YU Xianchang，WANG Jun，CHEN Zengjie,HE Chaoxing
Taking the green onion variety ‘Qingye No.1’as test material，the effects of inoculation with arbuscular mycorrhizal fungi（AMF）on the growth and mineral element absorption of green onion seedlings were studied．The results showed that AMF could form a good and stable symbiotic relationship with the onion root system，and the root mycorrhizal infection rate was 83.3% in 45 days seedlings．Compared with control （CK），inoculation with AMF significantly increased the plant height，pseudostem length，stem thickness，fresh and dry weight in both onion seedlings and roots，the root activity，root surface area，leaf photosynthetic pigment and nutrient mineral elements contents of N，P，K，and Mn in onion seedlings．These results suggest that inoculation with AMF is helpful in breeding robust green onion seedlings.
2024 Vol. 1 (8): 80-86 [
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Preparation of Manganese Ferrite Nanomaterials（MnFe2O4 NMs）and Eff ect of Foliar Spraying on Tomato Quality and Yield
ZHANG Xi’na，ZHU Xue，XIAO Haojun，QIN Xingli，SHI Songmei，SHEN Hui，YANG Zheng’an，ZHANG Hong
Nanomaterials have multiple potentials and applications，with special properties due to their size of less than 100nm，and have a greater potential for agricultural applications in recent years．In this study，the effect of 1、10、20、30、40 mg · L-1 5 different concentrations of manganese ferrite nanomaterials （MnFe2O4 NMs）on the quality and yield of tomato fruits was investigated by foliar spraying using a small fruited tomato inbred line‘6648’as test material．MnFe2O4 NMs were sprayed for four consecutive days 30 days after tomato planting（one week before flowering），and an equal amount of deionized water was sprayed as a control．The results showed that foliar spraying of MnFe2O4 NMs had a significant effect on improving the growth potential of tomato plants，and also induced a significant eff ect on the accumulation of biomass；at the same time，it could increase the content of soluble sugar，lycopene，VC，and the sugaracid ratio content of tomato fruits，which further improved the quality of tomato fruits；and it also had a significant effect on the increase of the yield of tomato fruits．The results of the study also showed that at low concentrations of MnFe2O4 NMs（1-10 mg · L-1 ），the growth of tomato plants was significantly promoted，and the effect was not signifi cant or even negative at higher concentrations．The total tomato yield increased by 12.7% with the application of 1 mg · L-1 MnFe2O4 NMs． Also analyzed by polynomial fitting，the concentration of MnFe2O4 NMs in the range of 4.01-7.25 mg · L-1 was found to be more effective in improving the growth and quality of tomato．This study provides some reference for the application of nanomaterials on tomato.
2024 Vol. 1 (8): 87-96 [
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Monitoring Resistance in Field Populations of Tuta absoluta to 3 Diamide Insecticides in Beijing and Zhangjiakou
HUANG Jianlei,ZHANG Daofeng，YAO Jiaqi，XU Yanjun，QU Cheng，LUO Chen，WANG Ran
Hot!
To clear and definite the resistance level of Tuta absoluta in the cities of Beijing and Zhangjiakou，the current work used leaf-dipping method with ten field-collected populations from the two cities to determine the levels of resistance to three popular diamide insecticides（5% chlorantraniliprole SC，20% fl ubendiamide WG，and 10% cyantraniliprole OD）．The results displayed that most of the ten fi eld-collected populations have developed low level of resistance to chlorantraniliprole and flubendiamide，respectively，and some of them have developed moderate resistance to the two insecticides．On the other hand，most of the ten field-collected populations showed high susceptibility or decreased susceptibility to cyantraniliprole，and some of them displayed low level of resistance to it．Moreover，significant resistance to all of the three popular diamide insecticides were detected in the Zhangjiakou Huailai field-collected population．Based on previously published cases and results of this study，application of chlorantraniliprole and fl ubendiamide should be cautious due to the detection of moderate resistance．Although high susceptibilities of cyantraniliprole were observed in the most field-collected populations of T.absoluta，other classes of insecticides were recommended to rotation with the diamide insecticides to avoid potential resistance development resulting from similar mode of action．
2024 Vol. 1 (8): 97-102 [
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The Effects of Combined Application of Chemical Fertilizers and Microbial Fertilizers on Tomato Growth，Yield，and Quality
JIANG Yu，WANG Juan,LIU Liyong，TAN Wei，WANG Zhiwei，FENG Yixin，WANG Lin， LI Jinlong
To investigate the effects of combined application of chemical fertilizers and microbial fertilizers on tomato growth and fruit quality，the tomato ‘Guanghui 101’was used as the test material，seven different fertilization treatments were set up，namely no fertilization（CK），formulated fertilization（M-1），conventional fertilization（M-2），chemical fertilizers combined with microbial agents（M-3），and M-1，M-2，M-3 reduced by 1/3 and base fertilizer combined with bio organic fertilizer（M-4、M-5、M-6）．The effects of different fertilization treatments on tomato growth，yield，and quality were studied．The results showed that the tomato plants treated with M-3 had the best growth．Compared with CK，the plant height，stem diameter，and number of internodes increased by 19.44%，13.57%，and 15.15%，respectively，and the differences were significant．The single fruit weight，average fruit set，single plant yield，plot yield，and total yield increased by 3.45%，14.66%，19.35%，18.77%，and 18.77%，respectively．Overall，the combination of microbial agents with chemical fertilizers（M-3）treatment can be considered as the optimal fertilization schemes for tomatoes，which includes the base fertilizer of 750 kg·hm-2 of potassium sulfate，stable nitrogen source mixed fertilizer，and 30 kg·hm-2 of microbial agents（Bacillus subtilis M101，Trichoderma harzianum TH7，and Purpureocillium lilacinum PL22），and top application of massive element water-soluble fertilizer（N∶P∶K = 19∶19∶19）675 kg·hm-2 ，（N∶P∶K = 15∶5∶30）225 kg·hm-2 ，and microbial agents 360 kg·hm-2．
2024 Vol. 1 (8): 103-108 [
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Effects of Biostimulants on Yield，Quality and Plant Nutrients in Allium tuberosum
WANG Ting，HAN Long，GAO Junjie，LIU Zhongliang，CHEN Zhen，YAN Weiqiang，GU Duanyin
To explore and obtain new fertilizers suitable for Allium tuberosum growing in facilities，the study take single-root red Chinese chives as test materials to research the influence of 5 types of biostimulant，namely chitin，amino acid，fish protein，alginicacid and humicacid on Allium tuberosum’s output，quality，photosynthetic pigment content and plant nutrient in the condition with the same content of nitrogen fertilizers applied．The results showed that applying different types of biostimulant can significantly increase the total output and tillering number of Allium tuberosum，and the overall output and tillering number of the Allium tuberosum treated with humicacids increased by 24.40% and 24.41% respectively in comparison to those treated with common nitrogen fertilizers．The influences of diff erent types of biostimulant on the contents of Allium tuberosum’s soluble sugars，soluble proteins and VC are different，and the humicacids with the content of 30 kg·hm-2 show the best treatment eff ect．They not only improve the contents of the pyruvicacids in plants and chlorophyll a and chlorophyll b in leaves，but also significantly reduce the contents of nitrates and cellulose．The contents of total nitrogen，total phosphorus and total potassium in Allium tuberosum treated with humicacids are significantly higher than those treated with regular nitrogen fertilizers and blank control，showing the highest nitrogen partial factor productivity，agricultural efficiency and input-output ratio．The comprehensive analysis shows that the humicacids with the content of 30 kg·hm-2 can realize high-output and high-quality Allium tuberosum production.
2024 Vol. 1 (8): 109-115 [
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A New Taste Tomato F1 Hybrid Resistant to TYLCV —‘Zhewei No.2’
WANG Rongqing，ZHOU Guozhi，RUAN Meiying，YE Qingjing，YAO Zhuping，CHENG Yuang，WAN Hongjian，LI Zhimiao
‘Zhewei No.2’is a new taste tomato F1 hybrid of mid-size fruit type．It is cultivated by conventional crossbreeding method combined with molecular marker-assisted screening techniques，which inbred line T18-238AA’as female parent and‘T20-055A’as male parent．It is of early maturity，and infinite growth type．The fruit is of round shape．The mature fruit is pink in color with good brightness．It is resistant to cracking．Its commodity is excellent．It is rich in flavor and taste．The single fruit weight is about 120 g．It is highly resistant to tomato yellow leaf curl virus（TYLCV），and resistant to tomato mosaic virus（ToMV），blight，grey leaf spot，root-knot nematodes．The soluble solid content is 8.5%，lycopenecontent is 68.29 mg · kg-1 ，VC content is 197 mg · kg-1 ，total soluble sugar content is 58 g · kg-1 ，titratable acid content is 3.84 g · kg-1 ，and sugar acid ratio is 15.10．It can yield about 60 t · hm-2 ．It is suitable for cultivation at protected fields in Zhejiang Province and surrounding areas in early spring and autumn delayed dates．
2024 Vol. 1 (8): 116-119 [
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A New Pepper F1 Hybrid—‘Huangding No.2’
XU Qing，LI Yonghui，SHEN Aimin,LIANG Bo，GU Xiaomin
‘Huangding No.2’is a new fresh pepper F1 hybrid，obtained by crossing inbred line ‘ZY20-3-8’as female parent and‘ZY25-1-4’as male parent．It is of mid-early maturity，flowering starting from the 9th to 10th node，and growth period of about 189 days．The fruit is of long horn-shaped，with green-yellow color when immature and red when ripe．Its longitudinal diameter is 21.0-31.0 cm，horizontal diameter is about 4.2 cm，and single fruit weight is of 80-115 g．The fresh fruit VC content is 1016 mg · kg-1 ，capsaicincontent 0.22%，excellent market quality，good storage and transport resistance．It exhibits stronger resistance to TMV，CMV，Phytophthora，and anthracnose compared to the control‘Zhengjiao No.11’．The plant shows strong growth vigor，high continuous fruit-setting ability．The yield is 63-75 t · hm-2 ．It is suitable for cultivation in spring and autumn protected areas and open fields in Henan，Guizhou，Zhejiang，Jiangsu，Shandong，Shaanxi Province．
2024 Vol. 1 (8): 120-123 [
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A New Chili Pepper F1 Hybrid—‘Dantianfang No.6’
SANG Aiyun，LIU Jianjun，SHEN Bingtao，ZHANG Ruixia，WANG Yihui，LI Yan，MA Wenquan
‘Dantianfang No.6’is a new chili pepper F1 hybrid with large fruit-type，prepared by taking high generation inbred line‘DP1-8’as female parent and inbred line‘KS8-1’as male parent．The plant type is compact，plant height is about 78 cm and spreading degree is about 72 cm．Its branching and fruit setting ability is strong．The fruit is of finger shape，straight and attractive，with smooth surface．Its vertical diameter is 7.0-9.0 cm，and transverse diameter is about 1.0 cm．The ripe green fruit is green in color，and red ripe fruit is bright red in color．The VC content of fresh fruit is 650 mg · kg-1，and capsaicin content is 0.16%．It is of mid-early maturity，initial flower node is about 11th and takes about 90 days from fix planting to first harvest．It is resistant to Phytophthora blight．It can yield fresh pepper about 67.5 t·hm-2．It is suitable for planting at protected fields in early spring or open fields oversummer in Henan，Anhui，Gansu，Hebei，Hubei，Jiangsu，Ningxia，Shandong，Shanxi，Shaanxi，Sichuan，Xinjiang．
2024 Vol. 1 (8): 124-126 [
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A New Leaf Lettuce Cultivar—‘Yunyoumai No.1’
ZHANG Liqin,LAN Mei，XU Xuezhong，HU Jingfeng，YANG Hongli，ZHAO Yalan，HE Jiangming
‘Yunyoumai No.1’is a new leaf lettuce cultivar developed by systematic selection of single plant from mixed population of local variety‘Longyanlvyewoju’．Its plant growth is strong．The plant height is 31-35 cm，with 40-45 cm divergence．Its leaves are lance-shaped，green in color，with smooth surface．The leaves taste crispy with good quality．There are 37-40 leaves in one single plant．The single plant weight is 270-300 g．It can yield about 36 t·hm-2 ．It is highly resistant to downy mildew，tolerant to bolting．It is suitable for year-round cultivation in the central region of Yunnan Province．It takes 50-55 days from fix planting to harvest in summer and autumn protected field cultivation．While，winter and spring protected field cultivation will take 60-65 days from fi x planting to harvest．
2024 Vol. 1 (8): 127-129 [
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Hot!
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2024 Vol. 1 (8): 133-135 [
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2024 Vol. 1 (8): 136-138 [
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China Vegetables
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中国蔬菜
Copyright © 2011
China Vegetables
Address: the haidian district of Beijing zhongguancun south street, number 12 zip
code：100081 Tel：010-82109550 E-mail:zgsc@mail.caas.net.cn
