18 August 2006, Volume 1 Issue 8

    

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研究论文
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  Identification of Physiological Races of Powdery Mildew on Cucurbits in Beijing

  Wang Juan;Gong Guoyi;Guo Shaogui;et al.

  . 2006, 1(8): 7-9.

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  Twelve pathogen collections of powdery mildew,which came from watermelon,melon,pumpkin,cucumber and squash grown in the greenhouse or open field of different places in spring and autumn of Beijing,were detected using the international standard identification system.According to a series of reaction of powdery mildew to different host,it could be confirmed that the disease was caused by Sphaerotheca fuliginea.There were two races,race 1 and race 2France,of which race 2France was the dominant one.
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  The Changes of the Seed Vigor of Welsh Onion under Ultra-dry Storage

  Li Xin;Wang Qian

  . 2006, 1(8): 10-12.

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  The changes of seed vigor and various physiological indexes of welsh onion during normal and ultra-dry storage were studied.After stored at normal condition for 12 months,the seed vigor of welsh onion decreased with the extending of storage time.The seed vigor,SOD and POD decreased significantly;and electric conductivity,the content of soluble sugar and MDA increased significantly.But after 18 months of ultra-dry storage,the germination rate,germination index,vigor index,electric conductivity,the content of...
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  Combining Ability of Economic Characters in Seed Pumpkin(Cucurbita maxima Duch.)

  Xu Donghui;Zhang Yaowei;Li Chungang;et al.

  . 2006, 1(8): 13-15.

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  36 crosses were made in diallel cross design by using 6 inbred lines of seed pumpkin.Combining ability of individual fruit weight,fruit length,fruit diameter,seed length,seed width,seed amount per fruit,100 seeds weight and seed yield per fruit were investigated.And several genetic parameters of 8 characters mention above were estimated,the results showed that heredity of fruit weight,fruit length,seed amount per fruit and seed yield per fruit were affected mostly by non-additive effect,heterosis breeding i...
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  The Effects of Different Controlled-release Nitrogen Fertilizers on Yield and Quality of Flowering Chinese Cabbage

  Peng Xiahui;Liu Houcheng;Sun Guangwen;et al.

  . 2006, 1(8): 16-18.

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  The effects of different controlled-release nitrogen fertilizers(CRNFs)(PDU,PHU,PS2U,PS5U)on yield and quality of flowering Chinese cabbage(Brassica campestris L.ssp.chinensis var.utilis Tsen et Lee)were studied by field experiment.The results showed that the yield was significantly increased by 19.1 %~28.2 % with CRNFs application,compared with the urea treatment with same nitrogen level.The effects of PDU were the most obvious among the 4 CRNFs.The content of soluble protein and VC in flower stalk were th...
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  Resistance Evaluation of Tomato Rootstock and Its Tissue Culture Seedling to Root-knot Nematode(Meloidogyne incognita)

  Dong Daofeng;Cao Zhiping;Qu Yinghua;et al.

  . 2006, 1(8): 18-20.

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  The resistance of the tissue culture seedling from tomato resistant rootstock Beaufort(Lycopersicon lycopersicum ×L.hirsutum)was evaluated.The results indicated that the resistance of tissue culture seedling significantly declined compared with the rootstock seedling,but the resistance level was significantly higher than that of the check of Hezuo908,a susceptible tomato cultivar.The same trend was found when the tissue culture seedling grafted on Hezuo908 three months after inoculated with root-knot nemato...
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  Evaluation of 19 Pesticides on the Safety of Whitefly Parasite,Encarsia formosa

  Wang Yubo;He Xiaoqing;Zheng Shuhong;Zhu Guoren;Wu Qingjun;Xu Baoyun

  . 2006, 1(8): 21-22.

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  Identification of Tomato Seed Purity Using RAPD Technique

  Dai Xiuchun;Wang Fojiao;Xie Weiping;Zhang Hua

  . 2006, 1(8): 23-24.

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  Cluster Analysis of Quantitative Characters on Chinese Onion Genetic Rosources

  Chen Yunqi;Gao Limin;Liu Hongxing

  . 2006, 1(8): 25-26.

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品种选育
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  A New Hot Pepper F_1 Hybrid —‘Danjiao No.4’

  Wang Guodong;Li Meihua;Lin Gaoyu;et al.

  . 2006, 1(8): 27-28.

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  Danjiao No.4 is a new hot pepper F_1 hybrid by two crossing inbred lines CP_9 and CP_ 10.It has early maturity and takes about 95 days from sowing to harvest.It is middle resistant to virus.The total yield is 67.5 t·hm -2 in protected cultivation field.The fruit is blocky shaped with dark green color,thick wall(0.4 cm in flesh thickness)and good taste and has good commercial characteristic.It is suitable for protected cultivation in spring and has been extended to Liaoning,Jilin,Heilongjiang,Hebei,Shandong,...
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  A New Potato Variety —‘Zhengshu No.7’

  Wu Huanzhang;Guo Zhaojuan

  . 2006, 1(8): 29-30.

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  The potato variety of Zhengshu No.7 was developed by crossing female parent Favorita with male parent Yu malingshu No.1.It is an early maturity variety,and takes about 68 days from sowing to harvest.Its dormant period is about 45 days.It yields 30 t·hm -2 in spring.The tube is oval shaped,with yellow skin,yellow flesh,shallow eyes,12.2 % of starch,VC content is 158.0 mg·kg -1,crude protein content is 2.48 %,reducing sugar content is 0.81 %.The rate of marketable tuber is over 95 %.It has stronger resistance...
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  A New Purple-tsaitai F_1 Hybrid — ‘Wucaihongtai No.1’

  Wu Chaolin;Ding Zhuoyi;Zheng Mingfu;et al.

  . 2006, 1(8): 31-32.

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  Wucaihongtai No.1 is a new purple-tsaitai F_1 hybrid bred by crossing cytoplasmic male sterile line M-103A with inbred line 94-ST-24.It is an extremely early maturity hybrid which takes about 45 days from sowing to harvest.The flower stalk is 1.7 cm in diameter,and 40 g in average weight,purple red in color,covered with waxy powder.It has stronger resistance to soft than Hongzhao 50,similar resistance to downy mildew to Hongzha 50,and tolerance to heat.The yield is 22.5 t·hm -2.It can be cultivated in the m...