20 March 1996, Volume 1 Issue 2

    

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新优品种
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  Jiafen No. 15 ─A New Tomato Variety for Protected Cultivation

  Zhang Huan;Zhang Lemin;Chai Min

  . 1996, 1(2): 2-0.

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  Jiafen No. 15 (F_1) is a newly-developed tomato variety in Beijing Vegetable Research Center. It contains disease resistant genes to leaf mould (Cf_4 and Cf_5) and TMV (Tm-2￣a). It is suitable for growing under protection such as greenhouse and plastic house. The main Characteristics of Jiafen No. 15 are as follows; high resistance to diseases (leaf mould and TMV) and stress, well-setting fruit. early-maturity. pink and round or slightly-flat fruit with large size, high yield (67.5￣ 82.5t / ha) and super qu...
品种选育
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  Breeding of New Hybrid‘ Feng Kang of Luffa acutangula Roxb

  Chen Qinghua;Huang Tao;Zhuo Qiyong;He Xinzhou;Lin Yu e

  . 1996, 1(2): 3-0.

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  One outstanding combination FengKang is a hybrid F￣1 (KR91-1-1 with 2-1-1). The plants of Feng Kang grow vigorously and mature early. The number of nodes under the first female flower is 10.67. The fruit of Feng Kang is dark green and 62cm long. The average yield of Feng Kang was 2.37t per ha, 33.2 percent higher than control Dongguang Shuang Qing and 30.6 percent higher than the another control Xia Tang No. l . Furthermore, Feng Kang is more resistant to downy mildew and powdery mildew than Dong...
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  Breeding of A New Cucumber Variety‘ Jin Chun No. 2 under Plastic Tunnel

  Li Jiawang;LiGuang;Sun Zhongkui;Yang Sen

  . 1996, 1(2): 4-0.

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  Jin Chun No. 2 is a F1 from crossing the inbred line 30-87-1-3 and inbred line 86-31-4. It is early ripening, high yielding and high disease resistence (Downy mildew, powdery mildew, blight). It needs only 65 days from sowing to the first harvest, its early yield is 13500kg / ha and the total yield can be over 75000kg/ ha, 21% and 29% higher than Chang Chun Mi Ci respectively. It is cold tolerant and can grow normally at 11 ￣ 14℃ night temperature.It is high quality with straight bar, delicious and risp fru...
专题综述
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  Analyse of Heterosis and Combining Ability for Main Yield Characteristics in Carrot

  Duan Yu;Wang Yong;Ren Xiaoyun;and Du Gangqiang

  . 1996, 1(2): 6-0.

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  Heterosis and combining ability were analysed for 12 combinations by incomplete dialle of 3 strile lines and 4 inbred lines. The results showed: positive heterosis occured in plot yield, single root weight, root length and width. Heterosis of plot yield and single root weight were the highest, General combining ability was more important than specific combining ability.General combining ability of 30 family (B_3) indicated had higher positive values for plot yield,single root weight, root length and width. ...
研究论文
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  Technique for Identification of Heat Tolerance in Heading Chinese Cabbage

  Luo Shaobo;LiZhijun;Zhou Weibo;Kenichi Hida;Takehiko Nakashima

  . 1996, 1(2): 7-0.

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  The correlation analyses among the data of electric conductivity, growth chamber test, chlorophyll content and summer natural field test showed that the former two methods could reflect the heat tolerance of heading Chinese cabbage. The electrolyte leakage rate of the blade cell and the heat damage index had a markable negative correlation with heading rate under high temperature. Whereas, after high temperature treatment, chlorophyll content did not expressed relationship with head formation, and could not...
试验研究
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  Effect of Choline Chloride on Growth and Development of Cucumber Seedlings at Cotyledon Stage

  Chen Yifeng

  . 1996, 1(2): 8-0.

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  Promotive effects of choline chloride (CC) on cotyledon growth and adventitious root emergence in hypocotyl cut from 7d seedlings of Cucumis sativus were observed under controlled conditions. CC greatly made etiolated cotyledons greening at 70μmol/ L, expanding in area and inreasing in fresh and dry weights at 50￣ 400mg/ L. It was also obvious that CC at 100μmol / L could stimulate adventitious root differentiation in down end of hypocotyls when the cotyledon-hypocotyl segment was used as exprimental system...
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  Effect of Gibberellins on Eggplant Seed Vigour

  Si Yaping;He Weiming;Chen Diankui

  . 1996, 1(2): 9-0.

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  The method using Gibberellins solution to treat presowing eggplant seeds improved emergence speed, seed vigour and final germination rate. The seed vigour did not decline in 6￣ 8month storage. This method is feasible for faster and uniform emergence of strong seedlings in the field.
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  Gourd Seedling-laying Caused by Fungai Infection

  Xiao Guanghui

  . 1996, 1(2): 10-0.

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  The occurrence patterns of gourd seedling-laying caused by Pythium aphanidermatum and Rhizoctonia solani were almost the same. Most of the seedlings were infected by pathogens before the sprouts had come up out of the ground. The younger seedlings were more seriously infected. The disease occurred more seriously in the garden and greenhouse soil where there were more pathogens. Low temperature high or middle humid soil, Low light intensity, slightly high pH soil and deep soil cover over seeds were favourabl...