果树

• A RAPD Marker Linked to a Dominant Dwarf Gene in Apple
• Bi Xiaoying;Wu Luping;and An Lijia
• Acta Horticulturae Sinica. 2002, 29(1): 1-4.
• Abstract ( 1451 ) HTML ( 1207 ) PDF (194KB) ( 1207 ) 　　　
• Randomly Aplified Polymorphic DNA (RAPD) was employed to detect a molecular marker linked to the dominant dwarf gene in apple. A RAPD marker OPE1521001was proved to be linked to the dwarf gene. The genetic distance is 0. 69 cM. This work has provided a basis for locating and cloning Dw gene in the future.
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研究简讯

• NH₄⁺-N Accelerated Lipid Peroxidation Materials in Tomato Leaves in Nutrient Solution Cultivation
• Sun Zhaohui;Cheng Fei;Zhao Yuguo;and Li Shijun
• Acta Horticulturae Sinica. 2002, 29(1): 4-4.
• Abstract ( 1331 ) HTML ( 832 ) PDF (164KB) ( 832 ) 　　　
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果树

• Effect of Compact Mutants and Dwarfing Rootstocks on Endogenous HormoneContent of Apple
• Wang Liqin;Tang Fang;Zhao Fei;and Shu Huairui
• Acta Horticulturae Sinica. 2002, 29(1): 5-8.
• Abstract ( 1323 ) HTML ( 1343 ) PDF (171KB) ( 1343 ) 　　　
• Endogenous hormone regulation should be very important for apple dwarfing mechanism. Starking and its compact mutants , rootstocks in different warfing level were used to determine endogenous hormone content. The results were as follows : Compared to Red Delicious , its compact mutants had lower GA₁₊₃ and higher CTKs. CTKs/ GA₁₊₃ for dwarfing cultivars were 4. 78 to 6. 24 times of that for general cultivar. ABA , IAA content differed a little between compact and general apple cultivars. GA₁₊₃, ABA and CTKs in shoot tips and leaves varied about 13 % - 20 % for normal and dwarfing rootstocks. However , IAA in M9 leaves was 53. 7 % less than that in normal rootstock during the rest period of shoot growth. Using M26 as inter rootstock , IAA in scion leaves and fine roots of basic rootstocks dropped 34. 6 % and 25. 6 %. But the plant with Starkrimson as inter rootstock did not have this effect . So GA was very important for compact varieties. It erformed directly on above ground. But Dwarfing mechanism for rootstocks maybe was closed to polar transition of IAA.
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• Inheritance of Aroma Components in Vitis Interspecific Crossings
• Li Jiming and He Puchao
• Acta Horticulturae Sinica. 2002, 29(1): 9-12.
• Abstract ( 1277 ) HTML ( 1140 ) PDF (238KB) ( 1140 ) 　　　
• Abstracts : Aroma components of grape from F1 generation of two Vitis interspecific crossings were analysed with Gas chromatography2Mass spectrum2Computer System ( GC2MS2CS) . The results indicated that some
  components showd 1∶1 , 1∶3 and 1∶9 segregation ratio , with qualitative inheritance trends ; others had quantitative
  character inheritance.
  
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• Analysis of Genetic Diversity and Genetic Relationships of Chinese Chestnut
• Bao Zhaoxia andHuang Hongwen
• Acta Horticulturae Sinica. 2002, 29(1): 13-19.
• Abstract ( 1471 ) HTML ( 1270 ) PDF (232KB) ( 1270 ) 　　　
• Eighty-nine tradit ional cultivars of Chinese chestnut were investigated in present study for genet icdiversity, cultivar identification and genet icrelationships. Fifteen isozyme loci of 9 enzymes were examined using isoelectric focusing in thin􀀁layer polyacrylamide gels. The parameters of genetic diversity and genetic distance were calculated by Biosys 1 and henogram was constructed by UPGMA clustering analysis with NTSYS software. A high genetic diversity was observed in major chestnut production provinces, such as Zhejiang, Shandong, Hubei and Jiangsu. Eighty􀀁four out of total 89 cultivars examined can be uniquely identified by 15 multi􀀁locus isozymes. The
  UPGMA phenogram showed that the majority of cultivar of Shandong, Hubei, Jiangsu and Henan province was clustered together. The traditional cult ivars of Chinese chestnut were inclined to clustering of provincial groups.
  
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蔬菜

• The Effect of Ice Nucleation Active Bacteria on Cold Resistance of ApricotFlower Organs
• Yang Jianmin;Meng Qingrui;Peng Weixiu;Li Shaohua;Sun Fuzai;and Zhao Tingchang
• Acta Horticulturae Sinica. 2002, 29(1): 20-24.
• Abstract ( 1420 ) HTML ( 1286 ) PDF (228KB) ( 1286 ) 　　　
• Abstract : The hardiness of apricot flower organs were investigated with two varieties , by comparing the cold resistance. The obvious difference among the apricot flower organs and varieties with or without INA bacteria
  inoculation were observed. The variety Youyi had higher cold hardiness than Longwangmao. In addition , tests on the cold hardiness difference in various organs showed petal > stamen > pistal . Under stress of low temperatures ,
  treatment of bacteria can greatly raise relative electric conductivity , permeability of cell membrane , brown change and content of MDA , and cut down SOD , POD activity of apricot organs. The treated flower organs showed
  symptoms of serious frost at - 2 to - 3 ℃, and had supercooling points of - 2 ℃about higher than controls. The results demonstrated that INA bacteria are one major factor to incite frost damage to apricot flower organs , so during
  flowering phage , frost injury may be relieved through control of INA bacteria.
  
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• High Efficient System Establishment of Plant Regengation from CotyledonExplants of Pepper ( Capsicum annuum L. )
• Li Dingjun;;Zhang Baoxi;Zhao Kaijun;Xie Bingyan;and Luo Kuan
• Acta Horticulturae Sinica. 2002, 29(1): 25-29.
• Abstract ( 1580 ) HTML ( 1494 ) PDF (344KB) ( 1494 ) 　　　
• The report describes the development of a high efficient in vitro regeneration procedure from cotyledon explants of 17 sweet/ chilli pepper cultivars (Shuangfeng et al) . The effect of genotype , hormone , organic nutrient component and AgNO3 et al on the tissue culture from pepper cotyledon explants was investigated. Adding DJ(juice of peppr stem and leaf + kanamycin = 500∶1) organic nutrient component can improved the shoot buds differentiation and elongation rate. The best media for in vitro regeneration from cotyledon explants of pepper were discovered : the shoot buds induction medium: MB + IAA 1. 0 mg/ L + 62BA 5. 0 mg/ L + DJ 5. 0 g/ L + AgNO3 10. 0
  mg/ L ; the shoot buds elongation medium: MB + IAA 1. 0 mg/ L + 62BA 5. 0 mg/ L + DJ 5. 0 g/ L + AgNO3 10. 0 mg/ L + GA32. 0 mg/ L ; the rooting medium: MS + IAA 1. 0 mg/ L + NAA 0. 1 mg/ L.
  
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• Effects of CO₂ Enrichment on the Microstructure and Ultrastructure of Leavesin Cucumber
• Wei Min;Xing Yuxian;Wang Xiufeng;andMa Hong
• Acta Horticulturae Sinica. 2002, 29(1): 30-34.
• Abstract ( 1354 ) HTML ( 1149 ) PDF (250KB) ( 1149 ) 　　　
• The microstructure and ultrastructure of leaves in cucumber with CO₂ nrichment were investigated. It showed that the thickness of palisade tissue, epidermis and leaf increased simultaneously in CO₂ enriched leaves, and the ratio of palisade tissue to leaf thickness went up slightly. Longer and more tight ly arranged palisade cells were observed in leaves with CO₂ enrichment. Not only the number and size of chloroplast and starch grain, but also the number of grana and lamella increased as a result of CO₂ enrichment. No obvious chloroplast deterioration and thylakoid deformation were found in CO₂ enriched leaves. Enrichment at different CO₂ concentrations for three hours in morning was not very effective, but enrichment for six hours at 1 100+100 uL.L^-1 everyday produced most significant effects.
  
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• Effect of Ultradry Storage on Viability and Vigor of Tomato Seeds
• Zhang Haiying;Meng Shuchun;and Kong Xianghui
• Acta Horticulturae Sinica. 2002, 29(1): 35-38.
• Abstract ( 1534 ) HTML ( 1281 ) PDF (173KB) ( 1281 ) 　　　
• The effects of different moisture content on viability and vigor of tomato seeds were studied. At the MC of 4. 6 % and 2. 4 % , there was no injury to tomato seed after 13 years storage at 20 ℃, it did not vary
  significantly either in seed viability or seed vigor , the activities of dehydrogenase and SOD also remained well , electric conductivity value indicated that the membrane system of this treatment had good integrity , while at 1. 9 % moisture content , all those indexes decreased significantly. Those ultra2dried tomato seeds remained relatively high seed viability and vigor after 13 years storage at 0 ℃. The results indicated that we can store germplasm of tomato by using suitable ultradry storage.
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• Canopy Photosynthetic Characteristics and Its Relationship to Yield in Garlic
• Ai xizhen;Chen Liping;Zhang Zhenxian;Ma Xingzhuang;Wang Min;and Feng Hongjun
• Acta Horticulturae Sinica. 2002, 29(1): 39-42.
• Abstract ( 1497 ) HTML ( 1116 ) PDF (214KB) ( 1116 ) 　　　
• Abstract : The canopy photosynthetic characteristics of garlic was studied in this experiment . The result showed that there were obvious stage and diurnal changes of canopy photosynthetic rate (CPn) of garlic. CPn
  increased at first and decreased later with the growth stage advanced. Its peak was at bolting stage. The diurnal changes of CPn was a single2peak curve , and its peak value was at 12 : 00 A.M. CPn increased with LAI in the
  range from 1. 39 to 3. 14. The light saturation point and compensation point of canopy photosynthesis were about 1 960μmol·m^{- 2}·s ^{- 1} and 210μmol·m^{- 2}·s ^{- 1} , while the CO₂ saturation point and compensation point were 1 955 μmol·mol ^{- 1} and 136μmol·mol ^{- 1} . The CPn of garlic is positively related to the yield.
  
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• Effect of Heat Treatment on Cell Wall Components in Relation to Cell WallHydrolase of Excised Bamboo Shoots
• Luo Zisheng;Xi Yufang;Fu Guozhu;and LüChunxia
• Acta Horticulturae Sinica. 2002, 29(1): 43-46.
• Abstract ( 1486 ) HTML ( 1346 ) PDF (189KB) ( 1346 ) 　　　
• Effect of heat treatment on cell wall components and cell wall hydrolase of excised bamboo shoot during storage at ( 4 ±1 ) ℃ was investigated. As compared with the control , the activities of cellulase, pectinmethylesterase and polygalacturonase , edible rate and the content of water pectin of the excised bamboo shoot were higher, while the firmness and the content of cellulose, lignin and protopectin were lower.
  
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• Photorespiration and Xanthophyll Cycle in Adaptation to Strong Light in Ginger Leaves
• Xu Kun;Zou Qi;and Zheng Guosheng
• Acta Horticulturae Sinica. 2002, 29(1): 47-51.
• Abstract ( 1399 ) HTML ( 1574 ) PDF (231KB) ( 1574 ) 　　　
• Abstract: The apparent quantum yield (AQY) and photosystem Ò photochemical efficiency ( Fv/ Fm) in ginger ( Zingiber off icinale Rosc. ) leaves decreased significantly at clear midday, which indicated that obvious
  photoinhibition occurred, eg. , the AQY of 80%, 60% , 40% relative soil water contents was 0. 0312, 0. 0296, 0. 0218 at 7: 00, but 0. 0261, 0. 0186, 0. 0108 at 13: 00, and the Fv/ Fm was 0. 788, 0. 762, 0. 752 at 7: 00, but 0. 728, 0. 682, 0. 601 at 13: 00, respectively. The stress condition, such as drought, high tem2 perature and strong light enhanced the photoinhibition considerably. When ginger leaves treated at 35 e, 1 200 Lmol#m- 2#s- 1 PFD, the Fv/ Fm was descended 12. 5% in an hour, but no changes at 25 e , dark in 6 hours. Decrease of photosynthesis and increased ratio of photorespiration to photosynthesis were observed in water stress condition. The de2epoxidation extent of xanthephyll cycle was accelerated in ginger leaves subjected towater stress. The data presented in this paper indicated that photorespiration and xanthophylls cycle were important
  photoprotection mechanisms that effectively dissipate the excess light energy in ginger leaves.
  
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观赏植物

• A Study on Morphological Differentiation of Flower Bud of Osmanthus fragrans‘Houban Jingui’
• Wang Caiyun;Gao Liping;Lu Difei;and Huang Yanwen
• Acta Horticulturae Sinica. 2002, 29(1): 52-56.
• Abstract ( 1579 ) HTML ( 1248 ) PDF (285KB) ( 1248 ) 　　　
• The paraffin cut method was used to observe the developing process of the flower bud differentiation of Osmanthus f ragrans‘Houban Jingui’. The results showed that the flower bud differentiation process lasted for about 4 months from bract primordia differentiation in mid April to carpel primordia formation in late August . The process could be divided into 7 phases : bract differentiation phase , inflorescence primordium differentiation phase, single flower primordia differentiation phase, sepal differentiation phase of top flower , petal differentiation phase, stamen differentiation phase and pistil differentiation phase. The phase of bract differentiation and stamen differentiation were relatively long, The top flower of the nflorescence differentiated earlier and slower than the lateral flowers , and all the top and lateral flowers finished differentiation almost at the same time.
  
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研究报告

• Identification of Stenospermocarpy Mutants of Litchi by RAPD Analysis
• Liu Chengming;and Mei Mantong
• Acta Horticulturae Sinica. 2002, 29(1): 57-59.
• Abstract ( 1346 ) HTML ( 1328 ) PDF (192KB) ( 1328 ) 　　　
• For understanding the mechanismof stenospermocarpy mutation in litchi (Litchi chinensis Sonn. ) , RAPD analysis was conducted in this study. Huaizhi and Sanyuehong , two cultivars grown in South China, and nine spontaneous mutants from them were used as materials. After screening 500 102mer random primers for polymor phism among these two cultivars and their mutants , only one prime , OPL212 , was able to generate different elec
  trophoresis pattern between Huaizhi and its two seed2abortive mutants , as well as Sanyuehong and its four seed abortive mutants. The size of amplified fragments specifically for seed2abortive Huaizhi mutants was 1 645 bp , and
  which for seed2abortive Sanyuehong was 722 bp. The two specific amplified bands had been considered as markers of seed abortion genes in litchi.
  
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• Study on Red Globe Grape Leaf and Petiole Adventitious Bud RegeneratingSystem
• Li Yun;Feng Hui;and Tian Yanting
• Acta Horticulturae Sinica. 2002, 29(1): 60-62.
• Abstract ( 1327 ) HTML ( 1323 ) PDF (136KB) ( 1323 ) 　　　
• It is necessary to establish an efficient regenerating system before genetic transformation of grapevine. In this study, an efficient regenerat ing system was established. Advent itious buds were obtained from the leaves of Red Globe ( Vitis vinif era L. ) , and the factors that affect adventit ious bud regeneration were studied. The regenerating rate of adventitious bud had relationship with the kinds and the concentrat ion of plant growth regu lator, leaf position, etc. The opt imum medium for advent itious bud regeneration was found, which is NN69+ BA 2. 0- 2. 5 mg/ L+ IBA 0. 2 mg/ L. The regenerating rate of the adventitious bud from the first top leaf was the
  highest.
  
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• Winter Injury Index and Lethal Low Temperature for Introducted AmericanAlmond in Lanzhou, China
• Pan Xiaoyun;Wang Genxuan;and Cao Qindong
• Acta Horticulturae Sinica. 2002, 29(1): 63-65.
• Abstract ( 1184 ) HTML ( 991 ) PDF (127KB) ( 991 ) 　　　
• Cold hardiness for seven introduced almond cultivars was evaluated by winter injury index, trunk cambial browning (TCB) and electrolytic conductance test ( EC) with logistic equation. The results showed that the low temperature for 50% ( LT50) of one􀀁year excised dormant shoots from young tree to be killed was - 18. 0 to - 24. 5. Classificat ion of cold hardiness of these cultivars was evaluated by system analysis, the results were as follows: 1) the hardy cultivars included Butte and Padre which could bear - 24. 5 􀀂 ; 2) Nonpareil, Price and Monterey belonged to the medium hardy ones, whose LT50 was about - 20. 9; 3) the tender cultivars included Ne Plus and Sonora whose LT50 was about - 18. 3.
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• Cultivar Identification of Peach, Plum and Nai and Study on the Genetic Rela􀀁tionship of Nai (Prunus) Cultivars by RAPD Analysis
• Wu shaohua;Zhang dasheng;Pan dongming;and Lai zhongxiong
• Acta Horticulturae Sinica. 2002, 29(1): 66-68.
• Abstract ( 1330 ) HTML ( 1000 ) PDF (158KB) ( 1000 ) 　　　
• Some southern cultivars of plum, peach and nai were examined by RAPDs in this assay and discussed the genetic relat ionships of nai cultivars. Cluster analysis based on similarity coefficients showed that nai was one of species in Prunus instead of the hybrid between peach and plum, or variety of Prunus. RAPD is a valuable tool for the ident ification of specific genotypes and analysis of genetic relationships.
  
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• Molecular Identification of Main Cultivars of Torreya grandis by RAPDMarkers
• Tan Xiaofeng;Hu Fangming;Zhang Dangquan;Zhou Xuhui;and Yang Wei
• Acta Horticulturae Sinica. 2002, 29(1): 69-71.
• Abstract ( 1456 ) HTML ( 1140 ) PDF (162KB) ( 1140 ) 　　　
• The endosperm DNA samples of the seeds of a same individual plant of eight main cultivars (clones) of Torreya grandis are analyzed with RAPD technology by using 23 primers that have distinct polymor phism。The result indicated that there was a relatively large difference between the eight varieties at the level of DNA molecule; the marker genotype of varieties was established according to particularly isolated bands in the experiments; the clone varieties of Torreya grandis can be identified at the level of DNA molecule according to the marker genotype; the eight varieties of Torreya grandis were analyzed systematically with a assembling analysis tech nology, and the analyt ic result tallied with the two classes of tradit ional morphological classif icat ion on the whole.
  
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• Analysis of Relationships of Cauliflower, Broccoli and Purple Cauliflower byAFLP
• Sun Deling;Zhao Qiancheng;Song Wenqin;and Chen Ruiyang
• Acta Horticulturae Sinica. 2002, 29(1): 72-74.
• Abstract ( 1564 ) HTML ( 1072 ) PDF (149KB) ( 1072 ) 　　　
• Genetic relationships of inbreed line of cauliflower , broccoli and purple cauliflower were examimed by AFLP technology. 4901 bands were detected by using eight pairs of selective primers. Clustering analysis showed: cauliflower, broccoli, purple cauliflower and yellow cauliflower were divided into four groups, as to hered itary distance, it is close between purple cauliflower and broccoli, cauliflower is distant from others, yellow cauliflower is in midst. The art icle analysed relationships of cauliflower on molecular lever, and the method of analysing relat ionships of cauliflower with AFLP was studied.
  
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• Analysis of Isozyme in Varieties and Cultivars of Cymbidium sinense and Cym bidium goeringii
• Sun Caiyun;Zhang Mingyong;Liang Chengye;and Ye Xiulin
• Acta Horticulturae Sinica. 2002, 29(1): 75-77.
• Abstract ( 1351 ) HTML ( 1303 ) PDF (143KB) ( 1303 ) 　　　
• Five isozyme systems, EST, ME, PGI( NADP) , PGM( NAD) and SOD, were used to study the variation of isozyme in varieties and cult ivars of Cymbidium sinense and C. goeringii as well as the relationships a mong these taxa. Eleven loci were generated. Seven of them were polymorphic. EST, PGM( NAD) , SOD were polymorphic, two of them could be used to distinguish all of varieties and cultivars. The result showed that these isozyme systems could be used to distinguish cult ivars and varieties clearly, and these cultivars and varieties were divided into C. goeringii and C. sinense.
  
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• The RAPD analysis of the Rosa genus Plant of R. rugosa, R. chinensis and R.davurica
• Chen Xiangming;Zheng Guosheng;and Meng Li
• Acta Horticulturae Sinica. 2002, 29(1): 78-80.
• Abstract ( 1370 ) HTML ( 1619 ) PDF (205KB) ( 1619 ) 　　　
• Rosa rugosa, R. chinensis and R. davurica are belonged to Rosa genus , 15 cultivars were amplified by 16 primers , which produced 202 bands and 123 polymorphism bands. And the genetic tree was constructed by the ways of UPGMA method. It confirmed that R. rugosa and R. chinensis belonged to the one cluster group and R. davurica belonged to another by the dissimilarity of 0. 5. Moreover , dissimilarity of 0. 65 could resulted in 4 R. davurica to be divided into 4 cluster groups , respectively. While 5 R. chinensis belonged to one group. Mean while , 5 R. rugosa were belonged to one group , and 1 R. rugosa was one independent group. Therefore , the genetic relationship was close between R. chinensis and R. rugosa , and they were distant to R. davurica in genetic relationship.
  
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• Ornamental Germplasm Resources of Genus Buddleja L. in Yunnan
• Sun Weibang;Kong Fancai;Lam-Wing-Hime Mickael;Zhou Yuan;and Li Chongren
• Acta Horticulturae Sinica. 2002, 29(1): 81-83.
• Abstract ( 2079 ) HTML ( 1302 ) PDF (285KB) ( 1302 ) 　　　
• Yunnan has all types of the climate owning to its unique geographical location and the special topography. Hence Yunnan occupies the richest flora in China. Based on the field investigation on Genus Buddleja L. in Yunnan, this paper has summarized and described the natural distribution characteristics, and the ornamental features of flowers , foliages and flowering times of the 25 species which have a great ornamental potential . And some important work on exploiting the ornamental species and breeding the new cultivars has also been proposed.
  
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新品种

• The New Pear Variety‘Jinzhuguo’
• Shi Guo an;Zhang Guohai;Li Yingxian;and Zhang Yimin
• Acta Horticulturae Sinica. 2002, 29(1): 84-84.
• Abstract ( 1246 ) HTML ( 847 ) PDF (164KB) ( 847 ) 　　　
• The new pear variety Jinzhuguo is selected from wild Pyrus pyrifolia ( Burm. f. ) Nakai. The average fruit mass is 173 g, the fruit is long ovate, red dish􀀁brown colour. The flesh is fine, crisp, juicy, sour􀀁sweet, palatable and aronaticwith rich nutri ent. It fruits early and has high yield, resistance to virus, late maturity with long storage life at room temperature. It ripens in early November in Luoyang area.
  
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• ‘Dabailing’-A New Great Cultivar of Zizyphus juj uba Mill.
• Gao Li;Guo Yuxin;Zhou Guangfang;Shan Gonghua;and Wang Bin
• Acta Horticulturae Sinica. 2002, 29(1): 85-85.
• Abstract ( 1450 ) HTML ( 881 ) PDF (166KB) ( 881 ) 　　　
• Dabailing, a new cultivar of jujubee, is selected from jujubee orchard. It is characterized with large, uniform, attactive and good quality fruit . The cultivar shows early bearing, high yield and resistant to adverse
  growing conditions.
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• The New Watermelon F^₁ Hybrid Variety‘Hong guanlong’
• Zhang Xian;Wang Ming;Zhang Jinsheng;and Yang Jianqiang
• Acta Horticulturae Sinica. 2002, 29(1): 86-86.
• Abstract ( 1699 ) HTML ( 833 ) PDF (163KB) ( 833 ) 　　　
• Hong guanlong is a middle ripening watermelon hybrid. Its growing season is about 100 days. Its fruit shape is oblong, with red flesh. The average single fruit mass is above 8 kg. The soluble solid matter content in central part is 12. 2 %. It is a highly Fusarium wilt and anthrancnose diseases resistance hybrid, and with drought resistance and moisture tolerance. It is suitable to be grown in main watermelon growing region in China.
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• A New Melon Hybrid Cultivar-‘Whitesnow princess’
• Zhang Xiaobing and Zhang Guo
• Acta Horticulturae Sinica. 2002, 29(1): 87-87.
• Abstract ( 1330 ) HTML ( 945 ) PDF (172KB) ( 945 ) 　　　
• Whitesnow princess is one generation hybrid melon cult ivar released for protected cultivation in eastern China. It grows vigorously and is rsistant to disease, especially to powdery mildew. The fruit site is middle with about 157 g weight . Melon shape is ellipitic. The melon skin is smoothy withmilky white colour. Inner cavern is small. Flesh with orange yellow colour is about 4 cm in thickness and very crispy in texture. The quality is high, full flavored, sweet with 17% of soluble carbon hydrate.
  
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• A New Early Maturity Asparagus Bean Variety-‘E Jiangdou 2’
• Chen Chanyou;Zhou Yuquan;Zhao Xinchun;Hu Zhihui;and Zhang Fengyin
• Acta Horticulturae Sinica. 2002, 29(1): 88-88.
• Abstract ( 1253 ) HTML ( 1034 ) PDF (174KB) ( 1034 ) 　　　
• ‘E Jiangdou 2’ is a newly bred trailing variety. It is characterized by vigorous growth, early maturity, fine quality, high yield , resistance to disease and insensitive to light period. It is 5- 7 days earlier than Zhijiang 28- 2 . It is 29. 5 % higher in early yield and 15% higher in total yield than that of the popular culti var. The new cultivar is well suitable for early culture of rotected fields or in the open in the main productive areas of Asparagus bean in China.
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• A New Chinese Cabbage‘Yuyuan 50’
• Geng Jianfeng;Yuan Yuxiang;Zhang Xiaowei;Jiang Wusheng;Chen Xiao;Gao Muqiang;and Li Genyi
• Acta Horticulturae Sinica. 2002, 29(1): 89-89.
• Abstract ( 1328 ) HTML ( 902 ) PDF (174KB) ( 902 ) 　　　
• Yuyuan 50 is a new Chinese cabbage F₁ hybrid whose parents are self incompatiable double haploid lines induced by isolated microspore culture. It takes 52 days from sowing to maturity . Its head weight is 1. 45 kg , head shape index is 1. 74 . It s tolerant to heat and suitable to plant in summer, resistant to turnip virus, downy mildew and black spot. The marketable yeild is 52. 6 -58. 7 t.hm^-2.
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• New Begonia Varieties —‘Dabai’,‘Jianlü’,‘Meinü’and‘Zhongda’
• Tian Daike;Guan Kaiyun;Li Jingxiu;and Xiang Jianying
• Acta Horticulturae Sinica. 2002, 29(1): 90-90.
• Abstract ( 1382 ) HTML ( 1030 ) PDF (244KB) ( 1030 ) 　　　
• ‘Dabai’was F₁ hybrid crossed between Begonia daweishanensis and B. ‘White King’from B.rex. It is a rhizomatic herb without erect stem and with large leaves and red beautiful flowers.‘Jianlü’was F₁ hybrid of B. dryadis and B . hemsleyana. It is a rhizomatic and evergreen herb with thick stem, large green lobed leaves and red flowers.‘Meinü’was selected from F₁ hybrid between B. hemsleyana and B. deliciosa. It is a rhiromatic herb with medium sized lobed leaves with small white spots. ‘Zhongda’was F₁ hybrid crossed between B.cathayana and B. rex. It is a rhizomatic herb with erect stem and medium sized leaves with a white heart liked band.
  
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